Ethernet Port

Connect to the internal LAN network or router

RESET

Factory Reset button. Press and hold for a while to reset factory default settings.

DC IN

Power adapter connection

Analog Port

Connect to analog phones / fax machines with an RJ21 to RJ11 cable

FXS Ports

FXS port to be connected to analog phones / fax machines.

Act LED

Remains ON if plug the network cable.

LINK LED

Indicates Ethernet port activity.

FXS LED

Indicate status of the respective FXS Ports on the back panel

Busy – ON (Solid Green)

Available – OFF

Slow blinking FXS LEDs indicates Voice Mail for that port.

All FXS LEDs slow blinking indicates provisioning.

Pin

Signal

Pin

Signal

1

RING1

26

TIP1

2

RING2

27

TIP2

3

RING3

28

TIP3

4

RING4

29

TIP4

5

RING5

30

TIP5

6

RING6

31

TIP6

7

RING7

32

TIP7

8

RING8

33

TIP8

9

RING9

34

TIP9

10

RING10

35

TIP10

11

RING11

36

TIP11

12

RING12

37

TIP12

13

RING13

38

TIP13

14

RING14

39

TIP14

15

RING15

40

TIP15

16

RING16

41

TIP16

17

RING17

42

TIP17

18

RING18

43

TIP18

19

RING19

44

TIP19

20

RING20

45

TIP20

21

RING21

46

TIP21

22

RING22

47

TIP22

23

RING23

48

TIP23

24

RING24

49

TIP24

GXW4216

GXW4224

GXW4232

GXW4248

Telephone Interfaces

16 FXS ports

24 FXS ports

32 FXS ports

48 FXS ports

SIP Provisioning

16 SIP accounts, 4 profiles

24 SIP accounts, 4 profiles

32 SIP accounts, 4 profiles

48 SIP accounts, 4 profiles

Network Interface

10/100/1000 Mbps, RJ-45

Number of Concurrent Calls (except when using SRTP)

16 Concurrent Calls

24 Concurrent Calls

32 Concurrent Calls

48 Concurrent Calls

Voice over Packet Capabilities

Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet loss concealment), LEC with NLP Packetized Voice Protocol Unit (supports RTP and AAL2 protocol), G.168 compliant Echo Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711

Voice Compression

G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder, G.722, G.723.1A, G.726(ADPCM with 16/24/32/40-bit rates), G.729, iLBC, G.726 provides proprietary VAD, CNG, and signal power estimation, Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock synchronization), AGC (automatic gain control),

Status output, Decoder controlling via voice packet header

DHCP Server/Client

DHCP Client only

Fax over IP

T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through,

Fax Datapump V.17, V.21, V.27ter, V.29 for T.38 fax relay

QoS

DiffServ, TOS, 802.1P/Q VLAN tagging

Transport Protocol

RTP

DTMF Method

In-audio, RFC2833, and/or SIP Info

IP Signaling

SIP (RFC 3261)

Provisioning

TFTP, HTTP, HTTPS

Security

SRTP, TLS/SIPS, HTTPS, 802.1x

Management

Syslog support, HTTP/HTTPS and SSH access

Dial Plan

Yes

3-way Conference

3-Way conference with local mixing

Caller ID

Bellcore Type 1 & 2, ETSI, BT, NTT, FSK and DTMF-based CID
Note: The GXW42xx V2 supports customizing the Caller ID order for Vonage services to ensure Caller ID information is displayed according to the configured priority (Date & Time -> Calling Number ->  
Calling Name)

Polarity Reversal / Wink

Yes

Network Connectivity

IPv4, TCP/UDP, RTP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SSH, PPPoE, STUN, DDNS, OpenVPN®

GXW4216

GXW4224

GXW4232

GXW4248

Telephone Interfaces

16 RJ11 Ports/

1 RJ21 Port

24 RJ11 Ports/

1 RJ21 Port

32 RJ11 Ports/

2 RJ21 Ports

2 RJ21 Ports only

FXS LEDs

16

24

32

48

Network Interface

LAN, Single 10/100/1000 BASE-TX, RJ45

Power Input

Input: 100-240VAC, 50/60Hz

Output: 12V DC, 5.0A (4216/24/32)

24V DC, 6.25A (4248 only)

LCD Screen

128×32 pixel

Telco Connector

1 RJ21 (50 pins)

1 RJ21 (50 pins)

2 RJ21 (50 pins)

2 RJ21 (50 pins)

RJ-11 Connectors

Yes

Yes

Yes

No

Function Buttons

1 button for Reset/Factory Reset

Environmental

Operation: 0 °C to 40 °C (V1), 0 °C to 45 °C (V2)

Storage: -10°C to 60°C

Humidity: 10％ to 90% Non-condensing

Mounting

Desktop and Rack mount

On-hook Voltage

Fixed, 48V

Ring Voltage

50Vrms (balanced ringing)

Ring Frequency

20-50 Hz

Short Haul Loop

2REN: Up to 2km on 24 AWG wire

2REN: Up to 2km on 24 AWG wire

2REN: Up to 2km on 24 AWG wire

2REN: Up to 2km on 24 AWG wire

Outdoor Protection

Over-voltage Protection and surge immunity

Signaling

FXS Loop-start

EMC

EN55022/EN55024 and FCC part15 Class B

Safety

UL

Compliance

FCC, CE, C-Tick

Menu

Voice Prompt

User’s Options

Main Menu

“Enter a Menu Option”

Enter “*” for the next menu option

Enter “#” to return to the main menu

Enter “001 – 005,007, 010, 013 – 017,047, 086 or 099” Menu option

Enter “9” for confirming an option

001

“DHCP Mode”,

“PPPoE Mode” or “Static IP Mode”

Enter ‘9’ to toggle the selection

If user selects “Static IP Mode”, user need configure all the IP address information through menu 002 to 005. If user selects “Dynamic IP Mode”, the device will retrieve all IP address information from DHCP server automatically when user reboots the device.

002

The current WAN IP address is announced

Enter 12-digit new IP address if in Static IP Mode.

Example: to set the IP address 192.168.5.7, enter the following 12 digits 192168005007

003

“Subnet “ + IP address

Same as Menu option 002

004

“Gateway “ + IP address

Same as Menu option 002

005

“DNS Server “ + IP address

Same as Menu option 002

007

Preferred Vocoder

Enter “9” to go to the next selection in the list:

PCMU

PCMA

iLBC

G-726

G-723

G-722

G-729

010

“MAC Address”

Announces the Mac address of the unit.

012

WAN Port Web Access

Press “9” to switch between enable/disable.
Default is Enabled.

013

Firmware Server IP Address

Announces current Firmware Server IP address. Enter 12-digit new IP address.

Example: to set the IP address 192.168.2.43, enter the following 12 digits 192168002043

014

Configuration Server IP Address

Announces current Config Server Path IP address. Enter 12-digit new IP address.

Example: to set the IP address 192.168.40.155, enter the following 12 digits 192168040155

015

Upgrade Protocol

Upgrade protocol for firmware and configuration update. Enter “9” to toggle between TFTP and HTTP

016

Firmware Version

Firmware version information.

017

Firmware upgrade mode. Enter “9” to rotate among the following three options:

1. always check

2. check when pre/suffix changes

3. never upgrade

020

“Certification Information”

Annouces the Certification Information of the unit.

047

“Direct IP Calling”

Enter the target IP address to make a direct IP call, after dial tone. (See “Make a Direct IP Call”.)

086

Voice Mail

Number of voice mails

099

“RESET”

Enter “9” to reboot the device; or

Enter MAC address to restore factory default setting

(See Restore Factory Default Setting section)

700-748

Phone calls between different ports of the same GW42xx

GXW42XX support inter-port calling from voice menu for easy test/verification in factory

“700” Ring all ports and connect to first port pick up the call

“701-732” Call individual port

“Invalid Entry”

Automatically returns to Main Menu

Key

Call Features

*02

Forcing a Codec (per call): *027110 (PCMU), *027111 (PCMA), *02723 (G723), *02729 (G729), *0272616 (G726-r16), *0272624 (G724-r24), *0272632 (G726-r32), *0272640 (G726-r40), *027201 (iLBC)

*03

Disable LEC (pe call) Dial “*03” +” number”. No dial tone is played in the middle.

*16

Enable SRTP

*17

Disable SRTP

*30

Block CallerID (for all-config change)

*31

Send CallerID (for all-config change)

*67

Block CallerID (per call)

*82

Send CallerID (per call)

*47

Direct IP Calling. Dial “*47” + “IP address”. No dial tone will be played in the middle. Detail see Direct IP Calling section on page 12.

*50

Disable Call Waiting (for all-config change)

*51

Enable Call Waiting (for all-config change)

*69

Call Return Service: Dial *69 and the phone will dial the last incoming phone number received.

*70

Disable Call Waiting (Per Call)

*71

Enable Call Waiting (Per Call)

*72

Unconditional Call Forward: Dial “*72” and then the forwarding number followed by “#”. Wait for dial tone and hang up. (dial tone indicates successful forward)

*73

Cancel Unconditional Call Forward: Dial “*73” and wait for dial tone, then hang up.

*74

Enable Paging Call: Dial “*74” and then the destination phone number you want to activate in Paging mode.

*78

Enable Do Not Disturb (DND): When enabled all incoming calls will be rejected.

*79

Disable Do Not Disturb (DND): When disabled, incoming calls will be accepted.

*87

Blind Transfer

*90

Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial tone then hang up.

*91

Cancel Busy Call Forward: dial “*91”. Wait for dial tone. Hang up.

*92

Delayed Call Forward: Dial “*92” and then the forwarding number followed by “#”. Wait for dial tone then hang up.

*93

Cancel Delayed Call Forward: Dial “*93” for a dial tone, then hang up.

*98

Play registration ID: Dial “*98”, the registration ID will be announced.

*99

Provision start: Dial “*99”, the provisioning process will be triggered.

Flash/Hook

If user hears call waiting beep, flash/hook will switch to the new incoming call. Also used to switch to a new channel for a new call.

#

Pressing pound sign will serve as Re-Dial key.

User Level

Username

Password

Web Pages Allowed

End User Level

user

123

Only Status and Basic Settings

Administrator Level

admin

Browse all pages

Viewer Level

viewer

viewer

View all pages. Not allowed to modify the content.

System Info

Product Model

Displays the product model and hardware version.

Part Number

Displays the part number.

Serial Number

Displays the serial number.

Certificate Type

Displays the security certificate type.

Software Version

System Up Time

Displays the duration since the device was last rebooted.

System Time

Displays the current system time synchronized with the configured NTP server.

System Information

Downloads the system information file for diagnostic purposes.

Note: The device supports periodically saving the system time to a local timefile for diagnostic purposes and system continuity.

Service Status

Displays ATA and GUI service information.

Network Status

MAC Address

Displays the device MAC address in hexadecimal format. The MAC address is used for provisioning and troubleshooting and is printed on the product label and packaging.

IP Address Mode

Displays the current IP address mode:

IP Address

Displays the current IP address assigned to the GXW42xx.

Subnet Mask

Displays the subnet mask.

Gateway

Displays the default gateway.

VPN Link

Displays the VPN connection status.

PPPoE Link Up

Displays the PPPoE connection status.

DNS Server 1/2

Display the primary and secondary DNS server addresses.

NAT Traversal

Displays the detected NAT type for each SIP profile based on the STUN protocol.

Port Status

Port

Displays the port number.

Hook

Displays the hook status:

SIP Registration

Displays the SIP registration status:

Call Features Status

Port

Displays the port number.

DND

Displays whether Do Not Disturb is enabled or disabled.

Forward

Displays the unconditional call forwarding destination.

Busy Forward

Displays the call forwarding destination when the line is busy.

Delayed Forward

Displays the call forwarding destination when the call is not answered.

CID

Displays whether Caller ID per Call is enabled or disabled.

Call-Waiting

Displays whether Call Waiting is enabled or disabled.

SRTP

Displays whether Secure Real-time Transport Protocol is enabled or disabled.

Network Settings for Service Interface

IP Address Mode for Service Interface

Specifies the IP address mode. The available options are:

Preferred DNS Server

Specifies the preferred DNS server used when the IP address mode is DHCP or PPPoE.

DHCP Settings

Host name (Option 12)

Specifies the DHCP client host name. This field is optional but may be required by the Internet Service Providers.

DHCP Domain

Specifies the DHCP domain name. This field is optional but may be required by the Internet Service Providers.

Vendor Class ID (Option 60)

Specifies the vendor class identifier transmitted in DHCP requests.

The default setting is “GXW4200”.

Client Circuit ID (Option 82)

Used to Encode an Agent-Local identifier of the circuit, Circuit ID sub-option is supposed to include information specific to which circuit the request came in on.

Remote Agent ID (Option 82)

The relay agent may use this field in addition to or instead of Agent Circuit ID field.  The remote ID sub-option carries information relating to the remote host end of the circuit

PPPoE Settings

PPPoE Account ID

Configures the PPPoE account ID.

PPPoE Password

Configures the PPPoE password.

PPPoE Service Name

Specifies the PPPoE service name.

Static IP Settings

IP Address

Configures the static IP address.

Subnet Mask

Configures the subnet mask.

Gateway

Configures the default gateway.

DNS Server 1

Configures the primary DNS server.

DNS Server 2

Configures the secondary DNS server.

Network settings for Management Interface

Enable management interface

Enables or disables the management interface for HTTP, HTTPS, and SSH access. If a management VLAN is configured and differs from the service VLAN, the management interface uses the management VLAN. Otherwise, a sub-interface is created on the service interface.

Management access

Specifies which interface accepts HTTP, HTTPS, and SSH connections. The available options are:

Enable SNMP Through Management Interface

Enables or disables routing SNMP traffic through the management interface.
Disabled by default.

Enable TR069 Through Management Interface

Enables or disables routing TR-069 traffic through the management interface.
Disabled by default.

Supported on GXW42xx V2 only.

Enable Syslog Through Management Interface

Enables or disables routing Syslog traffic through the management interface.

Disabled by default.

Supported on GXW42xx V2 only.

Enable Radius Through Management Interface

Enable or disable routing the web access radius packets through management interface
Disabled by default.

Supported on GXW42xx V2 only.

IP Address Mode for Management Interface

Specifies the IP address mode for the management interface. The available options are:

Static IP Settings (Management Interface)

IP Address

Specifies the static IP address for the management interface.

The default setting is “192.168.100.100”.

Subnet Mask

Specifies the subnet mask for the management interface.
The default setting is “255.255.255.0”.

Gateway

Specifies the default gateway for the management interface.
The default setting is “192.168.100.1”.

DNS Server 1

Specifies the primary DNS server for the management interface.
The default setting is “0.0.0.0”.

DNS Server 2

Specifies the secondary DNS server for the management interface.
The default setting is “0.0.0.0”.

LLDP

Enable LLDP

Enables or disables Link Layer Discovery Protocol (LLDP).
Enabled by default.

Layer 2 QoS Settings

Layer 2 QoS 802.1Q/VLAN Tag for Service Interface

Specifies the layer 2 QoS 802.1Q/VLAN Tag for the service interface.

The default setting is “0”. The valid range is 0-4095.

Layer 2 QoS 802.1Q/VLAN Tag for Management Interface

Specifies the layer 2 QoS 802.1Q/VLAN Tag for the management interface.

The default setting is “0”.  The valid range is 0-4095.

Layer 2 QoS 802.1p Priority Value for SIP signaling

Specifies the Layer 2 QoS 802.1p priority for SIP signaling packets.
The default setting is “0”. The valid range is 0-7.

Layer 2 QoS 802.1p Priority Value for RTP media

Specifies the Layer 2 QoS 802.1p priority for RTP media packets.
The default setting is “0”. The valid range is 0-7.

Layer 2 QoS 802.1p Priority Value for Management Interface

Specifies the Layer 2 QoS 802.1p priority for management interface traffic.
The default setting is “0”. The valid range is 0-7.

Advanced Network Settings

Maximum Transmission Unit (MTU)

Configures the Maximum Transmission Unit (MTU) in bytes. The MTU specifies the largest IP packet size that can be transmitted without fragmentation.

The default setting is “1500”. The valid range is 576 to 1500 bytes.

HTTP Proxy

Specifies the HTTP proxy URL used by the gateway to route packets. The proxy server acts as an intermediary between the gateway and the destination.
Supported on GXW42xx V2 only.

HTTPS Proxy

Specifies the HTTPS proxy URL used by the gateway to route packets. The proxy server acts as an intermediary between the gateway and the destination.
Supported on GXW42xx V2 only.

Bypass Proxy for

Specifies the destination IP addresses that do not require a proxy server. The gateway sends packets directly to the specified destinations without using the proxy server.
Supported on GXW42xx V2 only.

STUN Settings

Use STUN

Enables or disables STUN.

Disabled by default.

STUN server

Specifies the IP address or domain name of the STUN server. Only non-symmetric NAT routers work with STUN.

Number of STUN Response Misses Allowed

The Number of STUN response misses allowed before restarting DHCP. The minimum is 3 misses.

Specifies the number of consecutive STUN response timeouts allowed before DHCP is restarted.

The default setting is “3”. the valid range is 3-15.

Keep-Alive Interval

Specifies the interval, in seconds, at which the device sends a UDP keep-alive packet to maintain the NAT binding.
The default setting is “20”. 

Firewall Setting

Blocklist for WAN Side Port

Specifies the WAN-side ports or port ranges to block. Multiple entries can be separated by commas.

Example: 5000-6000,7000

Reply to ICMP

Enables or disables responses to ICMP echo requests on the WAN side port.

Local DNS Setting

Local DNS

Specifies local DNS mappings between fully qualified domain names (FQDNs) and IP addresses.
Example: FQDN0/IP0; FQDN1/IP1; FQDN2/IP2; FQDN3/IP3

Lock Keypad Update

If set to “Yes”, the configuration update via keypad is disabled.

Firmware Upgrade and Provisioning

Specifies how firmware upgrading and provisioning request to be sent.

There are three options to choose from: “Always Check for New Firmware”, “Check New Firmware only when F/W pre/suffix changes”, and “Always Skip the Firmware Check”.

XML Config File Password

The password used for encrypting the XML configuration file using Open SSL. This is required for the phone to decrypt the encrypted XML configuration file.

HTTP/HTTPS User Name

The user name needed to authenticate with the HTTP/HTTPS server.

HTTP/HTTPS Password

The password needed to authenticate with the HTTP/HTTPS server.

Always send HTTP Basic Authentication Information

Default is No. If set to Yes, device will send configured user name and password within HTTP request before server sends authentication challenge.

Validate Hostname in Certificate

This option controls whether the device should verify the server hostname against the Common Name (CN) or Subject Alternative Name (SAN) fields in the SSL certificate during HTTPS or FTPS provisioning and upgrade.

Upgrade via

Allows users to choose the firmware upgrade method via TFTP, HTTP or HTTPS.

Firmware Server Path

IP address or domain name of firmware server. That URL of the server that hosts the firmware release. The default server is: fm.grandstream.com/gs

Note: Valid input needs to match the following values ^$|^[a-zA-Z_.0-9-]{1,253}$|^[a-zA-Z_.0-9-]{1,253}/[a-zA-Z~%+_= ./0-9-]*$|^[a-zA-Z_.0-9-]{1,253}:[0-9]{1,5}$|^[a-zA-Z_.0-9-]{1,253}:[0-9]{1,5}/[a-zA-Z~%+_= ./0-9-]*$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]/[a-zA-Z~%+_= ./0-9-]*$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]:[0-9]{1,5}$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]:[0-9]{1,5}/[a-zA-Z~%+_= ./0-9-]*$

Config Server Path

IP address or domain name of the configuration server. The server hosts a copy of the configuration file to be installed on the gateway. The default server is: fm.grandstream.com/gs

Users can also add the variable $PN and $MAC in Config Server Path. $PN refers to the Product Model, and $MAC is equivalent to the MAC address.

Example: if config server path is set to “192.168.2.66/$PN” on GXW4216v2. The unit will retreive the configuration from this path “192.168.2.66/GXW4216V2”. On the other hand, if $MAC is added, the variable will be replaced with the unit’s specific MAC Address.

Note: Valid input needs to match ^$|^[a-zA-Z_.0-9-]{1,253}$|^[a-zA-Z_.0-9-]{1,253}/[a-zA-Z~%+_= ./0-9-]*$|^[a-zA-Z_.0-9-]{1,253}:[0-9]{1,5}$|^[a-zA-Z_.0-9-]{1,253}:[0-9]{1,5}/[a-zA-Z~%+_= ./0-9-]*$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]/[a-zA-Z~%+_= ./0-9-]*$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]:[0-9]{1,5}$|^[[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}:[0-9a-f]{1,4}]:[0-9]{1,5}/[a-zA-Z~%+_= ./0-9-]*$

Firmware File Prefix

This field enables user to store different versions of firmware files in one single directory on the firmware server. If configured, only the firmware file with the matching prefix will be downloaded.

Firmware File Postfix

This field enables user to store different versions of firmware files in one single directory on the firmware server. If configured, only the firmware file with the matching postfix will be downloaded.

Config File Prefix

This field enables user to store different configuration files in one single directory on the configuration server. If configured, only the configuration file with the matching prefix will be downloaded.

Config File Postfix

This field enables user to store different configuration files in one single directory on the configuration server. If configured, only the configuration file with the matching postfix will be downloaded.

Allow DHCP Option 43 and Option 66 to Override Server

If set to “Yes”, configuration and upgrade server’s information can be obtained using DHCP option 66 from DHCP server. This option specifies the URL of the TFTP server.

Notes:

Enable Using tags in URL

Allows users to configure variables on the configuration server path to differentiate the directories on the server.

Example: When provisioning, a user can define the mac address and IP address when sending  the HTTP Send request link in the following form “192.168.5.96:8060/?mac=[MAC]&lan_ip=[IP]”, the link will look like this example:http://192.168.5.99/mac=000b89a9064&lan_ip=192.168.5.99/cfg.xml

Default Value is “No”.

Download and Process All Available Config Files

By default, the device first provisions cfgMAC, then attempts to provision the first available configuration file in the following order: DHCP Option 67 boot file (cfgdhcpopt67.xml) → cfgMAC.xml → cfgProductModel.xml → cfg.xml (corresponding to the Option 67-specific, device-specific, model-specific, and global configuration files).

When this option is enabled, the device downloads and processes all available configuration files in the following order: cfg.xml → cfgProductModel.xml → cfgMAC.xml → cfgMAC → cfgMAC_override.xml → DHCP Option 67 boot file (cfgdhcpopt67.xml). Each configuration file is applied sequentially, and settings in later configuration files overwrite those applied by previously processed configuration files.
Disabled by default.

Provision Config Order

Configures the custom order in which the device provisions configuration files when Download and Process All Available Config Files is disabled.

Select configuration files from the Available list and use the right arrow button to move them to the Selected list. To remove a configuration file from the Selected list, use the left arrow button to move it back to the Available list. Use the up and down arrow buttons to arrange the configuration files in the Selected list in the desired provisioning order.
The available configuration files are: 

By default, the Selected list contains the following configuration files in this order:
cfgMAC.xml → cfgMAC → cfgProductModel.xml → cfg.xml.

Additional Override DHCP Option

Allow users to configure additional DHCP Options to be used for the firmware server instead of the configured firmware server or the server from DHCP Options 43 and 66. It can be set to None or Option 150, it is set to None by default. 

3CX Auto Provision

Default is No. If set to Yes, phone will multicast SUBSCRIBE for provision if this feature is enabled.

Automatic Upgrade

Choose “Yes” to enable automatic upgrade and provisioning. When set to No, GXW42XX will only do upgrade once at boot up.

When “Check every day” or “Check every week” is checked, user can specify “Hour of the day (0-23)” or “Day of the week (0-6)”. Default time is Monday 1AM.

Randomized Automatic Upgrade

With this feature enabled, device will specify a random time to upgrade the device within the range of hours of the day or postpone the upgrade every X minute(s) by random 1 to X minute(s)

Hour of the Day (0-23)

Define the hour of the day to check HTTP/TFTP server for firmware upgrades or configuration files changes

Day of the Week (0-6)

Define the days of the week to check HTTP/TFTP server for firmware upgrades or configuration files changes

Authenticate Conf File

If set to Yes, configuration file is authenticated before being accepted. This protects the configuration from unauthorized modifications.

Firmware Key

For firmware encryption. It should be 32-digit in Hexadecimal Representation. End user should keep it blank.

Configuration File Types Allowed 

Allow users to choose Allowed Configuration File Types, All or XML Only, and Set by default to All.

Provision

Allows the user to manually provision the device based on the provided firmware path, without the need to reboot the unit.
Once  “Provision” is pressed the device will request the firmware file from the server.
If the device is under provisioning, if you attempt to click on “Provision” again, a pop mesage indicating that the device is currently provisioning will appear.

Upload Device Configuration

Upload Device Configuration

Upload the Config file to reload settings.

Restore from Backup Configuration

Restore the device configuration from the backup file.

Upload Device Firmware

Upload Device Firmware

Upload .bin file to the device to upgrade the firmware.

Download Device Configuration

Device Configuration

(Text format)

Click to download the device configuration file in .txt format.

Device Configuration

(XML format)

Click to download the device configuration file in .xml format.

Export Backup Configuration

(Encrypted XML)

Click to export all device configurations in encrypted .xml format

Enable TR-069 service.

Notes:

TR-069 Auto Configuration Servers URL (e.g., http://acs.mycompany.com, or IP address).

User specify the ACS Username.

ACS Password

User specify the ACS password.

Periodic Inform Enable

Default is No. If set to Yes, device will send inform packets to the ACS

Periodic Inform Interval

Frequency that the inform packets will be sent out to the ACS

Connection Request Username

The username for the TR-069 Auto Configuration Server to connect to the phone.

Connection Request Password

The password for the TR-069 Auto Configuration Server to connect to the phone.

Connection Request Port

Configures the port for the TR-069 Auto Configuration Server to connect to the device. Default is 7547.

RADIUS for Web Access Authentication

Enable RADIUS Web Access Control

Default is No

Action upon RADIUS Auth Server Error

Choose action upon RADIUS server error. Default is Authenticate Locally

RADIUS Auth Protocol

Configure RADIUS authentication protocol, the available options are:

PAP (Password Authentication Protocol): PAP sends the username and password in plaintext, making it less secure than other methods.
 
CHAP (Challenge Handshake Authentication Protocol): CHAP uses a challenge-response mechanism for authentication, enhancing security.
 
MsCHAPv1 (Microsoft Challenge Handshake Authentication Protocol version 1): An older Microsoft-specific CHAP variant.
 
MsCHAPv2 (Microsoft Challenge Handshake Authentication Protocol version 2): A more secure and improved Microsoft-specific CHAP variant with mutual authentication support.
 
Default value is “PAP”.

RADIUS Auth Server Address

Address of RADIUS Auth server

RADIUS Auth Server Port

Port of RADIUS Auth server (Default 1812)

RADIUS Shared Secret

Set RADIUS shared secret

RADIUS VSA Vendor ID

Configure RADIUS VSA Vendor IS to match RADIUS server’s configuration. Default is 42397 for Grandstream Networks Inc

RADIUS VSA Access Level Attribute

Configure RADIUS VSA Access Level Attribute to match RADIUS server’s configuration.

Note: Incorrect setting would cause RADIUS authenticate fail

RADIUS for call

Primary RADIUS Server

Set Primary RADIUS Server address.

Primary RADIUS Authentication Port

Default is 1812.

Primary RADIUS Account Port

Default is 1813.

Primary RADIUS Server Secret

Set Primary RADIUS Server Secret

Secondary RADIUS Server

Set Secondary RADIUS Server address.

Secondary RADIUS Authentication Port

Default is 1812.

Secondary RADIUS Account Port

Default is 1813.

Secondary RADIUS Sever Secret

Set Secondary RADIUS Server Secret

RADIUS Timeout

Default is 2.

RADIUS Retry

Default is 3.

OpenVPN® Settings

OpenVPN® Enable

Enables or disables the OpenVPN® feature.

Disabled by default.

OpenVPN® Server Address

Specifies the IP address or FQDN of the OpenVPN® server.

OpenVPN® Port

Specifies the listening port of the OpenVPN® server.

The default setting is “1194”.

OpenVPN® Server Secondary Address

Specifies the IP address or FQDN of the secondary OpenVPN® server.

OpenVPN® Secondary Port

Specifies the listening port of the secondary OpenVPN® server.

Randomly Select Server

Enables or disables random server selection. When enabled, one of the configured OpenVPN® servers is selected at random when establishing a VPN connection. When disabled, the device attempts to connect to the configured servers in the order they are listed.

Interface type

Specifies whether the interface type is Bridge (TAP) or Router (TUN).
The default setting is “TUN”.

OpenVPN® Transport

Specifies whether the OpenVPN® transport type is UDP or TCP.
The default setting is “UDP”.

Enable LZO Compression

Enables or disables LZO compression for the VPN connection.

Note: Enable this option only if LZO compression is also enabled on the OpenVPN® server.

OpenVPN® Encryption

Specifies the encryption algorithm used for OpenVPN®. Available options are:

The default setting is “BF-CBC 128-bit default key (variable)”.

OpenVPN® Digest

Specifies the digest algorithm used for OpenVPN®.

The default setting is “SHA1”.

OpenVPN® Username

Specifies the username used for OpenVPN® authentication.
Maximum length is 32 Characters.

OpenVPN® Password

Specifies the password used for OpenVPN® authentication.
Maximum length is 32 Characters.

OpenVPN® CA

OpenVPN® Certificate

OpenVPN® Client Key

OpenVPN® Client Key Password

Specifies the password used to decrypt the OpenVPN® client private key.

OpenVPN® TLS Key

Uploads a static TLS key used to secure OpenVPN® connections.

The TLS key is used for HMAC authentication or encryption of the control channel, depending on the selected OpenVPN® TLS Key Type.

Maximum length is 8192 characters.

OpenVPN® TLS Key Type

Specifies how the uploaded TLS key is used. The available options are:

The default setting is “None”.

SIP TLS Certificate

The GXW42XX series supports SIP over TLS. It has built-in private key and SSL certificate. The user specified SSL certificate used for SIP over TLS is in X.509 format.

SIP TLS Private Key

You may also customize the SIP TLS Private Key. The user specified SIP TLS private key used for SIP over TLS is in X.509 format.

SIP TLS Private Key Password

SSL Private key password used for SIP Transport in TLS/TCP.

Custom Certificate

This feature allows users to upload to this device their own certificate signed by custom CA certificate to manage client authentication.

Validate Server Certificates

This feature allows users to validate server certificate with our trusted list of TLS connections. The device needs to reboot after changing the setting. Default value is No.

Keep Security Setting After Reset

This feature depends on the reset lock feature. If enabled, security-related settings and trusted CA-related
settings will be kept during different kinds of resetting.
Disabled by Default.

Disable Weak TLS Cipher Suites

This feature allows users to Enable or Disable Weak TLS Cipher Suites.

Note: The default option is Disable All Of The Above Weak TLS Ciphers Suites.

Minimums TLS Version

Configures the minimum TLS version supported by the phone.

Note: The default setting is TLS 1.2.

Maximum TLS Version

Configures the maximum TLS version supported by the phone. Default is Unlimited.

Note: The default setting is Unlimited.

NTP Server

URI or IP address of the NTP (Network Time Protocol) server. Used by the phone to synchronize the date and time. An extensive list of public NTP servers can be found at http://www.ntp.org

Secondary NTP server

URL or IP address of the secondary NTP server. The gateway may obtain the date and time from this server.

NTP Update Interval

Defines the update interval (in minutes) to obtain the date and time from the server.

Allow DHCP Option 42 to NTP Server

Default is Yes. DHCP Option 42 is enabled, the NTP server can be changed. If set to No will disable the NTP server be changed.

Time Zone

Configures the system’s local date and time based on the selected time zone. The device automatically adjusts for daylight saving time (DST) where applicable, ensuring accurate timekeeping across regions that observe seasonal time changes. Recent updates have expanded the list of supported zones to improve alignment with regional DST rules, including locations in the Middle East.

Self-Defined Time Zone

This parameter allows the users to define their own time zone. For syntax and examples, please refer to user manual.

Allow DHCP Option 2 to override time zone

Default is Yes. DHCP Option 2 is enabled, the time zone can be offset. If set to No, it will disable the time zone be offset.

Local Time

Allows users to set the device time from the host PC time via the browser. After clicking the button “Sync PC”, a pop-up window will inform the user that the synchronization has been done successfully.

Syslog Protocol

This feature allows users to configure the protocol used to send syslog. Protocol supported are: UDP, SSL and TLS. Default is: UDP.

Syslog Server

The IP address or URL of System log server. The server collects system log information from the device.

Note: Users can save syslog settings and internal logs across factory reset by enabling the following P-value on the device configuration file: P82307. The values are “0” (No) and “1” (Yes). Default is No.

Syslog Level

Select the GXW42XX to report the log level. Default is NONE.

The level is one of NONE, DEBUG, INFO, WARNING, ERROR, or EXTRA DEBUG. Syslog messages are sent based on the following events:

The Syslog uses USER facility. In addition to standard Syslog payload, it contains the following components:

GS_LOG: [device MAC address][error code] error message

Example: May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000] Ethernet link is up

Syslog Header Format

When “RFC3164 Compliant” is enabled, the syslog header will contain the PRI and timestamp information to be compatible with RFC3164.

Print SIP in Syslog

Enable or disable printing of full SIP messages in Syslog.

SIP Log Option

By default, the device will split the allowed memory for SIP file into 2 parts. Device will create the first SIP file which is half of the allowed size, when it is full, device will create the second file. When “SIP File Option” is set to Keep, device will keep the SIP files when both files are full, no more new record will be stored. When this feature is set to Override, device will clear the first SIP file and start storing again.

Save Syslog

Save Syslog to device. 3 rotate files save syslog. Each file could save at maximum 3 MB.

Note: Scroll down to “Syslog List” and “The list for SIP log files” to download the saved logs.

Ring Tones

System Ring Cadence

Configuration option for all FXS ports rings cadence for all incoming calls.
(Syntax: c=on1/off1-on2/off2-on3/off3; […]) Default is set to c=2000/4000; (US standards)

Call Progress Tones

Using these settings, the user can configure tone frequencies according to user preference. By default, the tones are set to North American frequencies. Frequencies should be configured with known values to avoid uncomfortable high pitch sounds. ON is the period of ringing (ON time in ms) while OFF is the period of silence. In order to set a continuous ring, OFF should be zero. Otherwise, it will ring ON ms and a pause of OFF ms and then repeat the pattern.

The below tones can be configured with the following syntax :
f1=val, f2=val[, c=on1/ off1[- on2/ off2[- on3/ off3]]];
(Frequencies are in Hz and cadence on and off are in 1 ms units)

Please refer to the document below to determine your local call progress tones:
http://www.itu.int/ITU-T/inr/forms/files/tones-0203.pdf

FXO Failover

Failover to FXO Gateway

Enable or disable the Failover FXO Gateway.

FXO Gateway IP

IP Address or URI of the FXO gateway.

System Features

Disable Direct IP Call

Disables the Direct IP Call function. Default is “No”. If set to “Yes” direct IP-to-IP calling will not be supported.

Inter-port Calling

With this feature enabled, when the FXS port is unregistered, users can use the same extensions of the FXS port for inter-port dialing instead of dialing ***7xx.

Disable SIP NOTIFY Authentication

Disables challenging SIP NOTIFY reboot and resync messages.

Disable Voice Prompt

Disables the voice prompt configuration. Default is “No”. If set to “Yes” accessing integrated voice menu will be impossible.

IVR Language

Choose English, Chinese, Russian or Spanish.

Upload/Delete Language Pack

Upload/delete language pack.

Display Language

Choose language for LCD display.

Prompt Dial Tone Code

Simulates an analog PBX where a code is required to dial an outside line.

Port Lock Code

This feature allows users to configure with star code to unlock a specific port with the dial out code.
The default is *21. The user is required to press *21 and the four-digit locking code twice to set the lock code.
To make a call, the user requires to press *21 and then the locking code and then the actual number to dial out.

If there is no locking code, the user dials out the actual number to make a call.

Play Busy Tone When Account is unregistered

If set to “Yes”, busy tone will be played when user goes offhook from an unregistered account.
Default value is “No”.

Country Specific Deployment

This feature allows to customize the tones to match the country’s specifications. There are 5 supported options: None (default), USA, China, China ITSP, and Germany.

Automatic Reboot

Default is No. When “Yes, reboot every day” or “Yes, reboot every week” is checked, user can specify “Hour of the day (0-23)” or “Day of the week (0-6)”. Default time is Monday 1AM.

LED Pattern

This feature allows users to customize LED patterns. There are three patterns to choose from:

Static DNS

A Record Settings

Name

The domain name to which the record refers.

Maximum supported length is 256 characters.

TTL

(Time to Live) refers to the time interval that the record may be cached before the source of the information should be consulted again. Valid range is from 300 to 65535.
Default value is “300”

Address

The IP address associated with the domain.
Maximum length is 64.

SRV Settings

Name

The domain name to which the record refers.

Maximum supported length is 256 characters.
Notes: When a SIP server returns a 5XX response, the device can automatically switch to an available backup IP address obtained through DNS SRV

TTL

(Time to Live) refers to the time interval that the record may be cached before the source of the information should be consulted again. Valid range is from 300 to 65535.
Default value is “300”.

Priority

Enables to prioritize target hosts that support the given service. Lowest number will get the highest priority. Target hosts with the same priority will be tried in an order defined by the weight field. Valid range is from 0 to 65535.

Default value is “0”.

Weight

Specifies the weight for entries with the same priority. Larger weight will get higher priority. Valid range is from 0 to 65535.
Default value is “0”.

Port

The port on the target host of the specified service. The valid range is 0-65535.

Default value is “0”.

Target

The domain name of the target host.

Maximum length is 64.

NAPTR Settings

Name

The domain name to which this resource record refers. Maximum length is 256 characters.

TTL

(Time to Live) refers to the time interval that the record may be cached before the source of the information should be consulted again. Valid range is from 300 to 65535.
Default value is “300”.

Order

Specifies the order in which the NAPTR record need to be processed, low numbers are processed before high numbers.
Valid range is from 0 to 65535.

Preference

Refers to the order in which NAPTR records with the same “Order” values need to be processed. records are processed from lower preference numbers to higher preference numbers.
Valid range is from 0 to 65535.

Flags

Indicate what happens next after this lookup, at this time 4 flags are defined.

Service

Specifies the services available in this domain. The replacement field is used to get to this service.

It can also specify the protocol used to communicate with the server that offers this service.
In SIP, three services are defined along with their resolution services (resolution services are defined after the “+” sign):

Maximum length is 64 characters and default value is “SIP+D2U”

Regexp

Contains a substitution expression that is applied to the original string held by the client in order to construct the next domain name to lookup.

Replacement

Depending on the value of the Flag field, this parameter contains the next FQDN to query for NAPTR, SRV, or address records.

General Settings fix

Profile Active

Enables or disables the SIP profile.
Disabled by default.

SIP Server

Specifies the IP address or domain name of the SIP server provided by the VoIP service provider.

Failover SIP Server

Specifies the IP address or domain name of the failover SIP server provided by the VoIP service provider. The failover server is used when the primary SIP server becomes unavailable.

Prefer Primary SIP Server

Specifies how the gateway prioritizes the primary SIP server when a failover SIP server is configured.

The default setting is “No”.

Primary Outbound Proxy

Specifies the IP address or domain name of the primary Outbound Proxy, Media Gateway, or Session Border Controller. The Outbound Proxy can be used to facilitate firewall or NAT traversal.

Backup Outbound Proxy

Specifies the backup Outbound Proxy used when the primary Outbound Proxy is unreachable.

Prefer Primary Outbound Proxy

Enables or disables prioritizing the primary Outbound Proxy. When enabled, the gateway re-registers through the primary Outbound Proxy when the registration expires.
Disabled by default.

Network Settings

Layer 3 QoS Settings

SIP Diff-Serv

Defines the Layer 3 QoS parameter for SIP signaling. This value is used for IP Precedence, Diff-Serv or MPLS.
The default setting is 26. The valid range is 0 to 63.

RTP Diff-Serv

Defines the Layer 3 QoS parameter for RTP media. This value is used for IP Precedence, Diff-Serv or MPLS.
The default setting is 46. The valid range is 0 to 63.

DNS Settings

DNS Mode

Configures the DNS lookup method used to resolve the SIP server. Available options are:

The default setting is A Record.

DNS SRV Use Registered IP

Enables or disables using the registered IP address as the INVITE destination instead of the highest-priority IP address from the resolved IP list.
Disabled by default. GXW42xx V1 only.

DNS SRV Failover Mode

Configures the preferred DNS SRV failover method. Available options are:

GXW42xx V2 only.

Failback Timer

Specifies the duration, in minutes, that the device remains on the failover Outbound Proxy before attempting to fail back to the primary Outbound Proxy.

The default setting is 60. The valid range is 1 to 64800 minutes. GXW42xx V2 only.

Register Before DNS SRV Failover

Enables or disables sending a new registration request before directing non-registration SIP requests to the newly selected server.

Disabled by default. GXW42xx V2 only.

Maximum Number of SIP Request Retries

Specifies the maximum number of SIP request retries before failover.
The default setting is 2. The valid range is 1 to 10. GXW42xx V2 only.

Primary IP

Configures the primary IP address where the phone sends DNS query to when “Use Configured IP” is selected for DNS mode.

Backup IP 1

Configures the backup IP 1 address where the phone sends DNS query to when “Use Configured IP” is selected for DNS mode.

Backup IP 2

Configures the backup IP 2 address where the phone sends DNS query to when “Use Configured IP” is selected for DNS mode.

NAT Settings

NAT Traversal

This parameter defines whether the GXW42XX NAT traversal mechanism is activated or not.

Default setting is No.

Use NAT IP

The NAT IP address used in SIP/SDP messages. It should ONLY be used if required by your ITSP.

Proxy-Require

A SIP Extension to notify the SIP server that the phone is behind a NAT/Firewall.

SIP Settings → Basic Settings

SIP Transport

Specifies the transport protocol used for SIP signaling. Available options are UDP, TCP, and TLS/TCP.
The default setting is UDP.

SIP Registration

Enables or disables SIP registration with the proxy server.
Enabled by default.

SIP URI Scheme When Using TLS

Specifies whether the sip or sips URI scheme is used when TLS/TCP is selected as the SIP transport.
The default setting is sips. GXW42xx V2 only.

Unregister on Reboot

Enables or disables unregistering when the device reboots.
Disabled by default.

Add Auth Header on Initial REGISTER

Enables or disables adding an Authorization header with a blank nonce to the initial REGISTER request.
Disabled by default.

Outgoing Calls Without Registration

Enables or disables placing outgoing calls when the SIP account is not registered. Incoming calls cannot be received when the account is not registered. Any port, member of a Hunting Group that is not registered with a SIP account, will be able to place outbound calls using the SIP credentials of the primary Hunting Group port.
Enabled by default.
For example: Port 1, 3 and 5 are members of the same Hunting Group. Port 1 is registered with a SIP account. Ports 3 and 5 are not registered. Ports 3 and 5 will be able to place outbound calls using the SIP account of port 1, even if Outgoing Call without Registration is set to No.

Register Expiration

Specifies the registration expiration interval, in minutes, before the device refreshes its registration with the registrar.
The default setting is 60 minutes. The maximum interval is 65535 minutes (about 45 days).

SIP Registration Failure Retry Wait Time

Specifies the retry interval, in seconds, before the device attempts to register again after a registration failure.
The default setting is 20 seconds. The maximum interval is 3600seconds.

SIP Registration Failure Retry Wait Time upon 403 Forbidden

Specifies the retry interval, in seconds, before the device attempts to register again after receiving a 403 Forbidden response. A value of 0 disables registration retries.
The default setting is 1200. The valid range is 0 to 3600.

Reregister Before Expiration

Defines how many seconds before the registration expires that the device attempts to re-register.

Enable SIP OPTIONS/NOTIFY Keep Alive

Enables or disables SIP OPTIONS/NOTIFY keep-alive messages.
Disabled by default.

SIP OPTIONS/NOTIFY Keep Alive Interval

Specifies the interval, in seconds, between SIP OPTIONS/NOTIFY keep-alive messages.
The default setting is 30.

SIP OPTIONS/NOTIFY Keep Alive Max Lost

 Specifies the maximum number of consecutive lost SIP OPTIONS/NOTIFY keep-alive messages allowed before the device re-registers.
The default setting is 3 . The range is 3–10.

Switch SIP Server When Keep-Alive Max Lost Is Reached

Enables or disables switching to the next SIP server when the maximum number of lost SIP OPTIONS/NOTIFY keep-alive messages is reached.

Disabled by default. GXW42xx V2 only.

Local SIP Port

Specifies the local SIP port used by the device to send and receive SIP messages.
The default setting for Profile 1 is 5060 and 6060 for Profile 2.

Use Random SIP Port

Enables or disables the use of random SIP ports instead of the configured local SIP port.
This is usually necessary when multiple GXW42XX /HT50X are behind the same NAT.
Enabled by default.

Local RTP port

Specifies the local RTP port used by the device to send and receive RTP packets. 
The default setting is 50000 for Profile 1, 51000 for Profile 2, 52000 for Profile 3 and 53000 for Profile 4.
Note: GXW42xx V2 supports calculating and adding checksum values to outbound UDP and RTP packets to improve packet integrity during transmission.

Use Random RTP Port

Enables or disables the use of a randomly generated RTP port instead of the configured local RTP port.
Enabled by default.

SIP T1 Timeout

Specifies the SIP T1 retransmission timer, which represents the estimated round-trip time between the device and the SIP server.
Note: If the network latency is high, select a larger value for more reliable usage.
The default setting is 0.

SIP T2 Timeout

Specifies the maximum retransmission interval for non-INVITE requests and INVITE responses.
The default setting is 0.

SIP TIMER D

Specifies the SIP Timer D value defined in RFC 3261 in seconds.
The default setting is 0. The valid range is 0 to 64.

SIP TIMER B

Specifies the SIP Timer B value defined in RFC 3261.
The default setting is 0. The valid range is 0 to 128. GXW42xx V2 only.

SIP TIMER F

Specifies the SIP Timer F value defined in RFC 3261.
The default setting is 0. The valid range is 0 to 128. GXW42xx V2 only.

Remove OBP from Route Header

Enables or disables removing the Outbound Proxy URI from the Route header. When enabled, the SIP extension notifies the SIP server that the extension is behind a NAT/Firewall.
Disabled by default.

Support SIP Instance ID

Enables or disables including the SIP Instance ID in the Contact header of REGISTER requests, as defined by the SIP Outbound specification.
Enabled by default.

Hold Target Before Refer

Enables or disables sending a re-INVITE to place the transfer target on hold before sending a REFER request.
Enabled by default.

Refer-To Use Target Contact

Enables or disables using the transfer target’s Contact header information in the Refer-To header during an attended transfer.
Disabled by default.

SUBSCRIBE for MWI

Enables or disables sending periodic SUBSCRIBE requests for Message Waiting Indication (MWI).
Disabled by default.

Subscribe Retry Wait Time upon 403 Forbidden

Specifies the wait time, in minutes, before retrying a subscription request after receiving a 403 Forbidden response. This helps avoid unnecessary network congestion.
If the value is not 0, device will retry 10 times first, then wait for the specified time before trying again. If the value is 0, device will follow “Retry-After” header if present. Otherwise, device will wait 20 minutes before sending subscribe again.

The default setting is 0. The valid range is 0 to10080.
GXW42xx V2 only.

Enable 100rel

Enables or disables support for the SIP 100rel extension and the PRACK (Provisional Response Acknowledgement) method. When enabled, the 100rel tag is appended to the value of the required header in the initial signaling messages.
Disabled by default.

TEL URI

Specifies the URI scheme used in SIP requests.

The default setting is “Disabled”.

Use Routing ID in SIP Headers / Use Request Routing ID in SIP Headers

Enables or disables using the configured Routing ID in SIP headers. When enabled, the Routing ID is used instead of the SIP User ID in the From and Contact headers for outgoing calls. This option is typically used for SIP trunk account configurations. The setting is ignored if the Routing ID for the caller port is blank in Advanced Port Settings. 

Disabled by default. GXW42xx V2 only.

Do Not Escape ‘#’ as %23 in SIP URI

Enables or disables sending # as # instead of encoding it as %23 in the SIP URI.
Disabled by default.

Disable Multiple m Line in SDP

 Enables or disables sending only one m line in the SDP, regardless of the number of m lines in the incoming SDP.
Disabled by default.

Use Privacy Header

Specifies whether the Privacy header is included in SIP messages.

The default setting is “Default”.

Use P-Preferred-Identity Header

Specifies whether the P-Preferred-Identity (PPI) header is included in SIP INVITE messages.

The default setting is “Default”.

Use P-Access-Network-Info Header

Enables or disables including the P-Access-Network-Info header in SIP INVITE messages.
Enabled by default. GXW42xx V2 only.

Use P-Emergency-Info Header

Enables or disables including the P-Emergency-Info header in SIP INVITE messages.
Enabled by default. GXW42xx V2 only.

Use P-Asserted-Identity Header

Enables or disables including the P-Asserted-Identity header in SIP INVITE messages.
Disabled by default. GXW42xx V2 only.

Use P-Early-Media Header

Enables or disables including the P-Early-Media header in SIP INVITE messages.
Disabled by default. GXW42xx V2 only.

SIP REGISTER Contact Header Uses

Specifies whether the LAN or WAN address is used in the Contact header of SIP REGISTER requests.
The default setting is “LAN Address”.

Caller ID Display

Specifies how the caller ID is obtained from incoming SIP INVITE messages.

The default setting is “Auto”.

Use Actual Ephemeral Port in Contact with TCP/TLS

Enables or disables the use of the actual ephemeral port in the Via and Contact headers when TCP/TLS is selected as the SIP transport. When disabled, the device uses the permanent listening port. When enabled, the device uses the ephemeral port assigned to the connection.
Disabled by default.

Allow SIP Factory Reset

Enables or disables factory resetting the device through a SIP NOTIFY message.
Disabled by default. GXW42xx V2 only.

Ignore Alert-Info Header

Enables or disables ignoring the Alert-Info header and playing the default ringtone.
Disabled by default. GXW42xx V2 only.

SIP User-Agent

Configures the SIP User-Agent value. The User-Agent header is constructed using the configured SIP User-Agent and SIP User-Agent Postfix values. If not configured, the default User-Agent header will be used.

SIP User-Agent Postfix

Configures the postfix added to the SIP User-Agent value.

Add MAC in User-Agent

Specifies whether the gateway’s MAC address is included in the User-Agent header of outgoing SIP messages. Available options are:

The default setting is “No”.

Use MAC Header

pecifies whether the gateway’s MAC address is included in the MAC header of outgoing SIP messages. Available options are:

The default setting is “No”.

CSeq Tracking Mode

Specifies whether CSeq tracking is performed on a per-call or per-dialog basis.
The default setting is “Per-Call”. GXW42xx V2 only.

SIP Settings → Session Timer

Enable Session Timer

Enable or disable Session Timer support.

Enabled by default.

GXW42 V2 only.

Session Expiration

 Specifies the session expiration interval, in seconds. A SIP session must be refreshed using an UPDATE or re-INVITE request before this interval expires; otherwise, the session is terminated.
The default setting is “180”.

Min-SE

Specifies the minimum session expiration interval, in seconds.
The default setting is “90”.

Caller Request Timer

Enables or disables the use of the session timer for outgoing calls when the remote party supports session timers.
Disabled by default.

Callee Request Timer

Enables or disables the use of the session timer for incoming calls when they include a session timer request.
Disabled by default.

Force Timer

Enables or disables the use of the session timer when the remote party does not support it. When disabled, the session timer is used only when supported by the remote party.
Disabled by default.
Note: To disable the Session Timer completely, disable Caller Request Timer, Callee Request Timer, and Force Timer.

UAC Specify Refresher

Specifies which party refreshes the session when the device acts as the caller (UAC).

The default setting is “Omit”.

UAS Specify Refresher

Specifies which party refreshes the session when the device acts as the callee (UAS).

The default setting is “UAC”.

Force INVITE

Enables or disables using the INVITE method to refresh the session timer. When disabled, the UPDATE method is used for session refreshes.
Disabled by default.

SIP Settings → Security Settings

Validate Incoming Messages

Enables or disables validation of incoming SIP messages.
Disabled by default.

Check SIP User ID for Incoming INVITE

Enables or disables checking the SIP User ID in the Request URI of incoming INVITE messages. When enabled, the call is rejected if the SIP User ID in the Request URI does not match the phone’s SIP User ID. Direct IP calling is also disabled.
Disabled by default.

Accept Incoming SIP from Proxy Only

Enables or disables accepting incoming SIP messages only when the Request URI matches the SIP server address configured for the account. When enabled, incoming messages with a different Request URI are rejected.
Disabled by default.

Authenticate Incoming INVITE

Enables or disables authentication of incoming INVITE messages. When enabled, the phone challenges incoming INVITE requests with a 401 Unauthorized response.
Disabled by default.

Authenticate server certificate domain

Enables or disables verification of the server TLS certificate domain. When enabled, the device verifies that the certificate’s Common Name matches the configured SIP server.
Disabled by default.

Trusted Domain Name List

Configures a list of trusted domain names used for TLS certificate domain verification. If a domain in the certificate’s SAN list matches any domain in the trusted domain name list, the certificate is trusted. By default, the remote proxy domain name and SIP server domain name are trusted. The field supports letters, numbers, -, ., and *, and allows wildcard domain names such as *.mycompany.com to trust any domain ending in .mycompany.com.
GXW42xx V2 only.

Authenticate server certificate chain

nables or disables verification of the server TLS certificate chain. When enabled, the device verifies that the certificate is authorized by a trusted Certificate Authority.
Disabled by default.

Fax Settings

Fax Mode

Specifies the fax transmission mode.

The default setting is “T.38 (Auto Detect)”.

Fax Tone Detection Mode

Specifies whether the caller or callee initiates the Re-INVITE when a fax tone is detected. Available options: