Grandstream GXP1620/1625

Basic IP Phone.

Grandstream GXP1620/1625

The GXP1625 features effective and essential functionalities to create an easy-to-use experience for a user with light to medium call volume. Its focus on essential features and standard call support makes the GXP1625 a versatile and dependable phone.

Refer to the Quick User Guide for basic commands and control.

Configure your phone for the use with Cempilli SIP account

STEP 1 Make sure that your phone is connected to your network. You must first determine what IP address it received. To do this, press the next screen button as shown on the image below and see the status of your connection. The IP will look like this: (example only)


STEP 2 Go to any computer on your network which is equipped with a browser and enter the IP address that you saw on your telephone screen including the dots. For example:


STEP 3 When the login screen appears, you need to login as admin, please input your username and password (default is admin/admin) which will log you into the configuration screen. Navigate to MAINTENANCE on the top menu and once opened, navigate to UPGRADE and PROVISIONING on the left side tabs. Here you need to change the default values of the Config Server Path and Firmware Server path to and respectively as shown on the image below (a. and b.), next (under c.). Make sure the HTTP radius option is selected in both the Config Server Path and the Firmware Server Path. Click SAVE AND APPLY and reboot the phone by clicking on REBOOT link in top right corner (d).


STEP 4 Once the device reboots and you are logged in again, it is now time to configure your SIP account by navigating to ACCOUNTS on the top menu and General Settings on the left (see the image below). Activate account on the top radio button (click next to Yes). 1) Input Account Name (default can be user Name and Surname or SIP provider if you have more than one). 2) Input sip server ( if you are using Cempilli services, 3) outbound proxy (if any), 4) SIP user ID (you will be supplied with this by your SIP provider, in this case, 5) Auth User ID (same as SIP ID),  6) Password (supplied by and 7) Name (Extension name – will show to the other users, typically Name and Surname, but it can also be the extension number followed by an abbreviation of the name (e.g. 555-Mark M.) and finally 8) voicemail number *98 for Cempilli voicemail services.

Reboot the device and you are ready to go. This concludes basic installation.

  • 2 SIP accounts, 2 line keys, 3-way conferencing, 3 XML programmable context-sensitive soft keys
  • Dual-switched 10/100 mbps ports, integrated PoE on GXP1625
  • HD audio on speakerphone and handset
  • EHS support for Plantronics headsets
  • Up to 500 contacts, call history up to 200 records

The GXP1620/25 is a reliable Basic IP phone for the user who requires standard features for a light to medium call volume. Stay in touch with others with its 2 lines/SIP accounts, enjoy crystal clear HD audio and utilize its dual-switched 10/100 mbps ports (with integrated PoE on the GXP1625) for a flexible deployment. Maximize your productivity with essential supported features such as 3-way conferencing and 3 XML programmable soft keys. Together, these featuresmake the GXP1620/25 an easy-to-use and effective Basic IP phone.

As all Grandstream IP phones do, the GXP1620/1625 features state-of-the-art security encryption technology (SRTP and TLS). The GXP1620/1625 supports a variety of automated provisioning options, including zero-configuration with Grandstream’s UCM series IP PBXs, encrypted XML files and TR-069, to make mass deployment extremely easy.

Below please find the links to the user guides and more details about this model.

GXP16xx Series User Guide

Administration Guide

Quick User Guide

Quick Installation Guide


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