This document is the user manual for Grandstream Networks, Inc.'s GXP21xx SIP Enterprise Phone. It introduces the basic functions, usage methods and configuration methods of the phone.
The GXP21xx series is an executive SIP phone line offering multiple lines, programmable keys, and a backlit graphical display. The manual covers equipment packaging, installation, connection details, extension modules, safety compliance, warranty information, and a full configuration guide.
It also explains software upgrades via TFTP/HTTP, XML provisioning, and how to restore factory default settings. Detailed tables list hardware specifications, key features, and configuration menus for both keypad and web interfaces.
| Ethernet ports | Dual 10/100Mbps |
|---|---|
| Power over Ethernet | Supported (802.3af) |
| Maximum lines (GXP2120) | 6 lines |
| Conferencing | Up to 5-way |
| Power adaptor certification | UL certified |
The GXP21xx provides dual 10/100Mbps Ethernet ports.
Yes, it supports PoE according to the 802.3af standard.
The GXP2120 can handle up to six simultaneous lines.
Press OK, select Config, choose Factory Reset, enter the MAC address shown on the phone’s label, and confirm.