User Guide

P a g e | 40
GXP21XX User Guide
Version 1.0.9.26
• Call Return. Dial the last answered call.
➢ Go to phone's Web GUISettingsProgrammable Keys, configure the Line Key's Key Mode as
Call Return. Select the account to dial from, no Name or User ID must be set on for Call Return;
➢ Off hook the phone, or directly press the Call Return key to dial out.
• Via Paging/Intercom.
➢ Take handset off hook; or
Press Speaker button; or
Press Headset button with headset plugged in; or
Press an available LINE key to activate speaker;
➢ You shall hear dial tone after off hook;
➢ Press MENU button to switch the call screen from "Dialing" to "Paging";
➢ Enter the number;
➢ Press SEND, * or # keys to dial out.
Note:
• After entering the number, the phone waits for the No Key Entry Timeout (Default timeout is 4 seconds,
configurable via Web GUI) before dialing out. Press SEND or # key to override the No Key Entry
Timeout;
• If digits have been entered after handset is off hook, the SEND key will works as SEND instead of
REDIAL;
• By default, # can be used as SEND to dial the number out. Users could disable it by setting "User # as
Dial Key" to "No" from Web GUIAccount XCall Settings.
• For Paging/Intercom, if the SIP Server/PBX supports the feature and has Paging/Intercom feature code
set up already, users do not necessarily need toggle to paging mode in the call screen. Simply dial the
feature code with extension as a normal call.
• When dial out via paging, user can see the “call-info” header contains “answer-after=0” and “the “alert-
info” header contains “info=alert-autoanswer;delay=0” in the outgoing INVITE.
• During an active call, user can see call info on LCD: shows the call lasting time; shows contact
information if the number is already saved in phonebook. When dialing DTMF, user can press round
OK button to switch to call info page.
Making Calls Using IP Addresses
Direct IP Call allows two phones to talk to each other in an ad-hoc fashion without a SIP proxy. VoIP calls
can be made between two phones if:
• Both phones have public IP addresses; or
• Both phones are on the same LAN/VPN using private or public IP addresses; or
• Both phones can be connected through a router using public or private IP addresses (with necessary
port forwarding or DMZ).