Thank you for purchasing Grandstream GRP260X Essential IP Phones.
The GRP Series of Essential IP Phones provides simple, easy-to-use devices with zero-touch provisioning for mass deployment and easy management. The four devices in the Essential series are designed to offer simple-to-use, affordable desktop IP Phones with a sleek design and next-generation features. Built for the needs of on-site and remote workers and designed for easy deployment by enterprises, service providers, and other high-volume markets, these essential IP phones offer an easy-to-use and easy-to-deploy voice endpoint.
Warning
The following hardware versions do not support firmware downgrade after upgrading to version 1.0.5.37:
GRP2601(P) hardware version 1.9A
GRP2602(P) hardware version 1.9A
GRP2604(P) hardware version 1.7A
GRP2603P / GRP2604P hardware version 1.5A
GRP2603P hardware version 1.5B
GRP2603 / GRP2604 hardware version 1.6B
PRODUCT OVERVIEW
Feature Highlights
The following table contains the major features of the GRP260X phones:
GRP260x Features at a glance
Technical Specifications
The following table resumes all the technical specifications including the protocols/standards supported, voice codecs, telephony features, languages, and upgrade/provisioning settings for the GRP260X series.
This chapter provides basic installation instructions including the list of the packaging contents and information for obtaining the best performance with the GRP260X phone.
Equipment Packaging
GRP260X Package Content
Note
Check the package before installation. If you find anything missing, contact your system administrator.
GRP260X Phone Setup
The GRP260X phones can be installed on the desktop using the phone stand or attached to the wall using the slots for wall mounting.
Phone Stand and Mounting Slots on the GRP260X
Using the Phone Stand
For installing the phone on the table with the phone stand, attach the phone stand to the bottom of the phone where there is a slot for the phone stand. (Upper half, bottom part).
Using the Slots for Wall Mounting
1. Attach the wall mount spacers to the slot for wall mount spacers on the back of the phone.
2. Attach the phone to the wall via the wall mount hole.
3. Pull out the tab from the handset cradle (See figure below).
4. Rotate the tab and plug it back into the slot with the extension up to hold the handset while the phone is mounted on the wall (see figure below).
Tab on the Handset Cradle
Connecting the GRP260X
To set up the GRP260X, follow the steps below:
1. Connect the handset and main phone case with the phone cord.
2. Connect the LAN port of the phone to the RJ-45 socket of a hub/switch or a router (LAN side of the router) using the Ethernet cable.
3. Connect the 5V DC output plug to the power jack on the phone; plug the power adapter into an electrical outlet. If a PoE switch is used in step 3, this step could be skipped (For GRP260xP/G).
4. The LCD will display the Grandstream logo. Before continuing, please wait for the date/time display to show up.
5. Using the phone-embedded web server or keypad configuration menu, you can further configure the phone using either a static IP or DHCP.
Using Wi-Fi (GRP2602W only):
– On the LCD menu, navigate to “Settings → Wi-Fi settings” and enable Wi-Fi.
– Select “Wi-Fi Network” and GRP2602W will automatically start scanning within the range.
– A list of Wi-Fi networks will be displayed. Select the desired network, and if required, enter the correct password to connect.
– Users can add and connect to a hidden network by accessing “Wi-Fi” Network” and then pressing on Add softkey . Then enter the Network’s information.
Notes:
When the GPR2602W is not connected to any network (including Ethernet and Wi-Fi), a prompt interface will pop up to notify users about it. Users can quickly enter the “Wi-Fi Network” page by pressing on the Wi-Fi softkey.
For easy deployment, The GRP2602W is preconfigured out of the box to connect to a default SSID named wp_master with a password (WPA/WPA2 PSK) equal to wp!987@dmin, users can adapt these settings from the web UI as well to make it easier for deployment on customer site.
The QR code of SSID can be displayed to share with cellphones and other devices.
GRP260X Back Side View
Configuration via Keypad
To configure the LCD menu using the phone’s keypad, follow the instructions below:
Enter MENU options. When the phone is idle, press the round MENU button or Menu Softkey to enter the configuration menu.
Navigate to the menu options. Press the arrow keys UP/DOWN keys to navigate in the menu options.
Enter/Confirm selection. Press the round MENU to enter the selected option.
Exit. Press Return Softkey to exit to the previous menu.
Return to the Home page.
The MENU options are listed in the following table.
Configuration Menu
The following picture shows the keypad MENU configuration flow:
GRP260x LCD settings
Note
Users can also leverage the numeric keys and assign them different functions by pressing the key for 3 seconds and selecting the Mode and Value. The supported modes are: Speed Dial, Speed Dial via Active Account, Dial DTMF, Voicemail, Call Return, LDAP Search, Call History, INFO, Messages, DND, Redial, Open Door, Provision, and HTTP Command.
Configuration via Web Browser
The GRP260X embedded Web server responds to HTTP/HTTPS GET/POST requests. Embedded HTML pages allow a user to configure the IP phone through a Web browser such as Google Chrome, Mozilla Firefox, and Microsoft’s IE. To access the Web GUI:
Connect the computer to the same network as the phone.
Make sure the phone is turned on and shows its IP address. You may check the IP address by pressing the Up-arrow button when the phone is in an idle state.
Open a Web browser on your computer.
Enter the phone’s IP address in the address bar of the browser.
Enter the administrator’s login and password to access the Web Configuration Menu.
Notes
The computer must be connected to the same sub-network as the phone. This can be easily done by connecting the computer to the same hub or switch as the phone is connected. In the absence of a hub/switch (or free ports on the hub/switch), please connect the computer directly to the PC port on the back of the phone.
If the phone is properly connected to a working Internet connection, the IP address of the phone will display in MENU🡪Status🡪Network Status. This address has the format: xxx.xxx.xxx.xxx, where xxx stands for a number from 0-255. Users will need this number to access the Web GUI. For example, if the phone has an IP address of 192.168.40.154, please enter “http://192.168.40.154” in the address bar of the browser.
There are two default passwords for the login page:
When changing any settings, always SUBMIT them by pressing the “Save” or “Save and Apply” button at the bottom of the page. If the change is saved only but not applied, after making all the changes, click on the “APPLY” button on the top of the page to submit. After submitting the changes in all the Web GUI pages, reboot the phone to have the changes take effect if necessary (Most of the options do not require a reboot).
Saving Configuration Changes
After users make changes to the configuration, pressing the “Save” button will save but not apply the changes until the “Apply” button on the top of the web GUI page is clicked. Or users could directly press the “Save and Apply” button.
Rebooting from Remote Locations
Press the “Reboot” button on the top right corner of the web GUI page to reboot the phone remotely. The web browser will then display a reboot message. Wait for about 1 minute to log in again.
ADVANCED FEATURES
When Special Feature is set to Zoom under Accounts → Accounts → Advanced Settings → Advanced Features, the phone supports a variety of Zoom Phone features that enhance call handling, collaboration, and user flexibility. These features enable advanced call management capabilities such as shared lines, call monitoring, call parking, and hot desking, allowing organizations to streamline communications and improve productivity. The following sections provide an overview of the Zoom Phone features supported on Zoom-enabled phones.
SLA/SLG on Zoom Phones
Zoom Phones support SLA (Shared Line Appearance) and SLG (Shared Line Group) features, enabling users and administrators to share calling responsibilities, phone numbers, and voicemail access across multiple extensions and devices.
Shared Line Appearance (also known as Call Delegation) provides an easy way for phone users to assign others to handle calls on their behalf. For example, an executive can assign calling privileges to an assistant, allowing the assistant to make and receive calls on the executive’s behalf.
Shared Line Group allows Zoom Phone administrators to share a phone number and extension with a group of phone users or common area phones. All members of the shared line group have access to the group’s direct phone number and voicemail. Administrators can also apply business, closed, and holiday hours, as well as configure call routing rules for the group.
Zoom Phones support BMWT (Barge-In/Listen/Whisper/Takeover), a call monitoring and intervention feature that allows authorized users to supervise active calls and, when necessary, participate in or take control of them. Additionally, authorized users can monitor or intervene in active calls through configured softkeys.
In addition, Privacy Mode can be enabled to prevent unauthorized monitoring or intervention from other members in the call group while the call is in progress.
The following BMWT options are supported:
Barge-in: Join an active call as an additional participant.
Listen: Listen to an active call without any parties being aware.
Whisper: Speak privately to the monitored extension without other parties being aware.
Takeover: Replace the monitored extension and take full control of the active call.
Zoom Phones support Call Park, allowing users to place calls on hold and retrieve them from another phone or Zoom client using a retrieval code.
When a call is parked, Zoom Phone generates a retrieval code that can be used by another phone user to resume the call. Administrators can configure routing rules for unanswered parked calls. Public call park locations are accessible to all users, while private call park locations can be restricted based on administrator-defined permissions.
Zoom Phones support Hot Desking, allowing users to temporarily sign in to a provisioned desk phone using their extension number and PIN.
This feature enables users to access their phone number, extension, and voicemail from different desk phones without requiring a dedicated device. It is particularly useful in shared workspaces, rotating shifts, multi-office deployments, and other environments where users frequently change work locations.
Use case examples:
Out-of-office or traveling employees: Users can enable Hot Desking on their desk phone, allowing other users to temporarily sign in and use the device.
Shared office or co-working space: Users can share the same phone hardware while retaining access to their own extension, phone number, and voicemail.
Traveling sales or field teams: Users can sign in to any Hot Desk phone at different office locations while maintaining a single phone number and extension.
24/7 call centers: Shift workers can share the same desk phone while keeping separate extensions, phone numbers, and voicemail boxes.
This section describes the options in the phone’s Web GUI. As mentioned, you can log in as an administrator or an end-user.
Status: Displays the Account status, Network status, and System Info of the phone.
Account: To configure the SIP account.
Phone Settings: To configure phone general settings, Call Settings, Ringtone, and Multicast Paging.
Network Settings: To configure network settings.
Programmable keys: Configures idle and call screen softkeys And the Multi-purpose keys settings for the GRP2604 only.
System Settings: Configures Time and Language settings, Security Settings, Preferences, TR-069.
Maintenance: To configure upgrading and provisioning, System Diagnostics, Outbound Notifications, and Voice monitoring.
Application: Configures Web Service settings, Contacts, LDAP, and Call History.
External Service: Configures GDS Settings, Call Center, BroadSoft XSI.
Status Page Definitions
Account Page Definitions
Account settings definitions
Phone Settings Page Definitions
Phone settings definitions
Network Settings Page Definitions
Network Settings Definitions
Programmable keys Page Definitions
Programmable Keys Settings Definitions
System Settings Page Definitions
System Settings Definitions
Maintenance Page Definitions
Maintenance Settings Definitions
Application Page Definitions
Application Settings Definitions
External Service Page Definitions
External Service Settings Definitions
NAT SETTINGS
If the devices are kept within a private network behind a firewall, we recommend using STUN Server. The following settings are useful in the STUN Server scenario:
STUN Server
Under Settings→General Settings, enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the internet and enter it in this field. If using Public IP, keep this field blank.
Use Random Ports
It is under Settings→General Settings. This setting depends on your network settings. When set to “Yes”, it will force random generation of both the local SIP and RTP ports. This is usually necessary when multiple GRPs are behind the same NAT. If using a Public IP address, set this parameter to “No”.
NAT Traversal
It is under Accounts X→Network Settings. The default setting is “No”. Enable the device to use NAT traversal when it is behind a firewall on a private network. Select Keep-Alive, Auto, STUN (with STUN server path configured too), or other options according to the network setting.
PACKET CAPTURE
GRP260X is embedded with a packet capture function. The related options are under Maintenance→System Diagnosis→Packet Capture.
Packet Capture in Idle
Users can also define whether RTP packets will be captured or not from the With RTP Packets option.
When the capture configuration is set, press the Start button to start packet capture. The Status will become RUNNING while capturing, as shown in Figure 7: Packet Capture when running. Press the Stop button to end the capture.
Press the Download button to download the capture file to your local PC. The capture file is in .pcap format.
Packet Capture when running
Remote SSH capture
Remote SSH capture is the process of remotely accessing and capturing network traffic on a target machine via a secure shell (SSH) connection.
When configured, The Remote SSH option will allow us to capture the network traffic that is flowing through the GRP260x IP phone. This allows us to inspect the traffic, analyze it, and potentially identify any security issues or anomalies, to do this on the Wireshark network analyzer, we will need to follow the below steps :
1. Enable SSH under System settings → Security settings → SSH Access
2. Enable the sshdump and ciscodump components when installing Wireshark.
3. Once Wireshark is installed with the needed components, Launch the SSH remote capture configuration page, By clicking the icon shown below
4. Define the SSH server address and port, which are the captured device IP address and port.
5. Authenticate using the credentials of the device’s web UI.
6. Set the remote capture command to other:pcap.
Once the steps are followed, an “SSH remote capture” option will be displayed on the main page of Wireshark, to start capturing, click on “SSH remote capture” as shown below
and when capturing a packet in the web UI of the grandstream IP phone it can be viewed and monitored on Wireshark software directly as shown in the example below:
Note
Please contact technical support for steps to decrypt encrypted captured packets.
UPGRADING AND PROVISIONING
Warning
The following hardware versions do not support firmware downgrade after upgrading to version 1.0.5.37:
GRP2601(P) hardware version 1.9A
GRP2602(P) hardware version 1.9A
GRP2604(P) hardware version 1.7A
GRP2603P / GRP2604P hardware version 1.5A
GRP2603P hardware version 1.5B
GRP2603 / GRP2604 hardware version 1.6B
Unified Firmware
The GRP2601 / GRP2601P / GRP2602 / GRP2602P /GRP2602W / GRP2603 / GRP2603P / GRP2604 / GRP2604P support unified firmware for all GRP260X models.
GRP260X Unified Firmware
Firmware Upgrade
The GRP260X series can be upgraded via TFTP / FTP / FTPS / HTTP / HTTPS by configuring the URL/IP Address for the TFTP / HTTP / HTTPS / FTP / FTPS server and selecting a download method. Configure a valid URL for TFTP, FTP/FTPS, or HTTP/HTTPS, the server name can be FQDN or IP address.
Open a web browser on a PC and enter the IP address of the phone. Then, log in with the administrator username and password. Go to the Maintenance🡪Upgrade and Provisioning page, enter the IP address or the FQDN for the upgrade server in the “Firmware Server Path” field, and choose to upgrade via TFTP, HTTP/HTTPS, or FTP/FTPS. Update the change by clicking the “Save and apply” button. Then “Reboot” or power cycle the phone to update the new firmware.
When upgrading starts, the screen will show the upgrading progress. When done you will see the phone restart again. Please do not interrupt or power cycle the phone when the upgrading process is on.
Firmware upgrading takes around 60 seconds in a controlled LAN or 5-10 minutes over the Internet. We recommend completing firmware upgrades in a controlled LAN environment whenever possible.
No Local TFTP/FTP/HTTP Servers
For users who would like to use remote upgrading without a local TFTP/FTP/HTTP server, Grandstream offers a NAT-friendly HTTP server. This enables users to download the latest software upgrades for their phones via this server. Please refer to the webpage:
Alternatively, users can download a free TFTP, FTP, or HTTP server and conduct a local firmware upgrade. A free window version TFTP server is available for download from:
Unzip the firmware files and put all of them in the root directory of the TFTP server.
Connect the PC running the TFTP server and the phone to the same LAN segment.
Launch the TFTP server and go to the File menu🡪Configure🡪Security to change the TFTP server’s default setting from “Receive Only” to “Transmit Only” for the firmware upgrade.
Start the TFTP server and configure the TFTP server in the phone’s web configuration interface.
Configure the Firmware Server Path to the IP address of the PC.
Update the changes and reboot the phone.
End users can also choose to download a free HTTP server from http://httpd.apache.org/ or use the Microsoft IIS web server.
Custom Ringtones Provisioning
The custom ringtones can be provisioned from the link configured under the firmware server path, up to 6 ringtones can be customized. The phone will be looking for ringx.ogg as shown below, where x can be from 1 to 6:
Custom ringtone provisioning
Codec: must be Opus
Frequency: 16K
Audio Channel: Mono
Phone Provisioning
Configuration File Download
Grandstream SIP Devices can be configured via the Web Interface as well as via a Configuration File (binary or XML) through TFTP, FTP/FTPS, or HTTP/HTTPS. The “Config Server Path” is the TFTP, FTP/FTPS, or HTTP/HTTPS server path for the configuration file. It needs to be set to a valid URL, either an FQDN or IP address format. The “Config Server Path” can be the same or different from the “Firmware Server Path”.
A configuration parameter is associated with each field on the web configuration page. A parameter consists of a Capital letter P and 2 to 5-digit numeric numbers. i.e., P2 is associated with the “New Password” in the Web GUI🡪System Settings🡪Security Settings 🡪 User Info Management 🡪 AdminPassword. For a detailed parameter list, please refer to the corresponding configuration template.
When the GRP260x series boots up or reboots, it will issue a request to download an XML file named “cfgxxxxxxxxxxxx.xml”, where “xxxxxxxxxxxx” is the MAC address of the phone, i.e., “cfg000b820102ab” and “cfg000b820102ab.xml”. If the download of the “cfgxxxxxxxxxxxx.xml” file is not successfully followed by a configuration file named “cfgxxxxxxxxxxxx”, the phone will issue a request to download a specific model configuration file “cfg<model>.xml”, where <model> is the phone model, i.e., “cfggrp2601.xml” for the GRP2601, “cfgrp2602” for the GRP2602, “cfgrp2603” for the GRP2603 and “cfgrp2604” for the GRP2604. If this file is not available, the phone will issue a request to download the generic “cfg.xml” file. The configuration file name should be in lowercase letters, If not found, the phone will request a file named “dev[MacAddress].cfg” where “MacAddress” is the MAC address of the device, With this provisioning file, users can provision the device with both P-values and aliases.
Config File Download
Note: (attempt to download the config file again)
When doing provision on the phone, if your first config file contains p-values listed below, the phone will try to download the potential second cfg.xml file and apply the second file without rebooting. Maximum 3 extra attempts.
Those P-values are:
*212 -- Config upgrade via
*234 -- Config prefix
*235 -- Config postfix
*237 -- Config upgrade Server
*240 – Authenticate Config File
*1359 – XML Config File Password
*8463 – Validate Server Certificate
*8467 – Download and process ALL Available Config Files
*20713 – Always authenticate before challenge
*22011 – Bypass Proxy For
*22030 – Enable SSL host verification for provision
Note: (P-values that trigger Auto-Provision)
If the p-values listed below are changed while managing configuration on web UI or LCD, the provisioning process will be triggered:
* 192 -- Firmware upgrade server
* 232 -- Firmware prefix
* 233 -- Firmware postfix
* 6767 -- Firmware Upgrade Via
* 6768 -- Firmware HTTP/HTTPS Username
* 6769 -- Firmware HTTP/HTTPS Password
* 237 -- Config upgrade Server
* 212 -- Config upgrade via
* 234 -- Config prefix
* 235 -- Config postfix
* 1360 -- Config HTTP/HTTPS username
* 1361 -- Config HTTP/HTTPS password.
Note
P-Value that forces reboot when changes are applied by downloading the config file
When P-value 22421 (or alias “provision.config.forceReboot”) is set to 1 in the config file, the phone will need to reboot if any change is applied by downloading the config file. Specifically following the process below:
First-time download:
Phone downloaded a config file (in any supported format) with P22421 set to 1 included.
Phone found there is change(s) compared with the current setting on the phone (Any valid P-value change, no matter if it does need a reboot to apply or not).
The phone will update to the new setting (will not save P22421 itself) and will go into the normal reboot process (e.g.: if there is an active call, the phone will wait until it is finished)
Second-time download:
After reboot, the phone may download the same config file again (if the config file path did not change).
Phone checked the config file and found no P-value needed to be updated.
The phone will not reboot again.
Note: (Certificates and keys provisioning)
Users can configure the phone to get all the needed certificates during boot up. Instead of putting the certificate/key content in the text directly from the Web interface or uploading them manually, they can choose to provision them from the configuration file by putting the URL in the P-value field of each certificate and/or key. (e.g., http://ProvisionServer_address/SIP-TLS-Certificate.pem) The phone will then process the URL, search for the appropriate certificate/Key file, download it, and then apply it to the phone.
Certificates Files Download
For more details on XML provisioning, please refer to:
After the phone sends, the config file request to the Broadsoft provisioning server via HTTP/HTTPS, if the provisioning server responds “401 Unauthorized” asking for authentication, the phone’s LCD will prompt a window for the user to enter username and password. Once the correct username and password are entered, the phone will send the config file request again with authentication. Then the phone will receive the config file to download and get provisioned automatically.
Besides manually entering the username and password in the LCD prompt, users can save the login credentials for the provisioning process as well. The username and password configuration are under the phone’s Web UI🡪Maintenance🡪Upgrade and provisioning page: “HTTP/HTTPS Username” and “HTTP/HTTPS Password”. If the saved username and password are correct, the login window will be skipped. Otherwise, the login window will be popped up to prompt users to enter the correct username and password again.
Note
Starting from firmware version 1.0.3.83, the option to display an upgrade prompt on the LCD screensaver page was added
RESTORE FACTORY DEFAULT SETTINGS
Warning
Restoring the Factory Default Settings will delete all configuration information on the phone. Please backup or print all the settings before you restore them to the factory default settings. Grandstream is not responsible for restoring lost parameters and cannot connect your device to your VoIP service provider.
Restore Factory Settings using the LCD menu
Please follow the instructions below to reset the phone:
Press the MENU button to bring up the keypad configuration menu.
Navigate to Settings > Advanced Settings.
Select “Factory Reset”.
A warning window will pop out to make sure a reset is requested and confirmed.
Press the “Yes” Softkey to confirm and the phone will reboot, or “No” Softkey to cancel the Reset.
Restore to Factory Default via Web GUI
Login GRP2601/GRP2602/GRP2603/GRP2604 Web GUI.
Navigate to Maintenance → Upgrade and provision → Advanced Settings → Factory Reset.
Press on the Start Button situated against the Factory reset option
Click “OK” to confirm and the phone will reboot, or “Cancel” to cancel the Reset.
CHANGELOG
This section documents significant changes from previous versions of user manuals for GRP260X. Only major new features or major document updates are listed here. Minor updates for corrections or editing are not documented here.
Grandstream is a registered trademark and the Grandstream logo is the trademark of Grandstream Networks, Inc. in the United States, Europe, and other countries.
CAUTION
Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this guide could void your manufacturer warranty.
WARNING
Please do not use a different power adapter with devices as it may cause damage to the products and void the manufacturer’s warranty.
CERTIFICATION
U.S. FCC Part 68 Regulatory Information
This equipment complies with Part 68 of the FCC rules. Located on the equipment is a label that contains, among other information, the ACTA registration number and ringer equivalence number (REN). If requested, this information must be provided to the telephone company.
The REN is used to determine the quantity of devices which may be connected to the telephone line. Excessive REN’s on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of the REN’s should not exceed five (5.0). To be certain of the number of devices that may be connected to the line, as determined by the total REN’s contact the telephone company to determine the maximum REN for the calling area.
This equipment cannot be used on the telephone company-provided coin service. Connection to Party Line Service is subject to State Tariffs.
If this equipment causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. If advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be advised of your right the file a complaint with the FCC if you believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service.
If any trouble experienced with this equipment, please contact (Agent in the US):
Company Name: Grandstream Networks, Inc.
Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA
Tel: 1-617-5669300
If the trouble is causing harm to the telephone network, the telephone company may request you to remove the equipment from the network until the problem is resolved.
This equipment uses the following USOC jacks: RJ45C.
It is recommended that the customer install an AC surge arrester in the AC outlet to which this device is connected. This is to avoid damaging the equipment caused by local lightning strikes and other electrical surges.
Since this device has the HAC function, the earpiece is easy to absorb small, please take care to avoid scratching.
U.S. FCC Part 15 Regulatory Information
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
Frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Caution: Exposure to Radio Frequency Radiation
This equipment complies with EU radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body.
CE Authentication
Hereby, Grandstream Networks, Inc. declares that the radio equipment GRP2602W are in compliance with Directive 2014/53/EU.
The full text of the EU declaration of conformity is available at the following internet address:
GRP260x firmware contains third-party software licensed under the GNU General Public License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license. Grandstream GNU GPL-related source code can be downloaded from the Grandstream website from: https://www.grandstream.com/legal/open-source-software
. Then enter the Network’s information. 
