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Force INVITE
Session Timer can be refreshed using INVITE method or UPDATE method.
Select “Yes” to use INVITE method to refresh the session timer.
Enable 100rel
PRACK (Provisional Acknowledgment) method enables reliability to SIP
provisional responses (1xx series). This is required to support PSTN inter-
networking..
Account Ring Tone
There are 4 uniquely defined ring tones:
• One (1) System Ring Tone: when selected, all calls will ring with system
ring tone.
• Three (3) Customer Ring Tones: when selected, incoming calls from
designated account will play selected ring tone.
Send Anonymous
If this parameter is set to “Yes”, the “From” header in outgoing INVITE message
will be set to anonymous, essentially blocking the Caller ID from displaying.
Auto Answer
Default is No. If set to “Yes”, GXP2020 will automatically switch on speaker to
answer the incoming call. Set to Intercom/Paging mode, it will answer the call
based on the SIP info header from the server.
Preferred Vocoder
The GXP2020 supports up to 5 different Vocoder types including G.711(a/µ) (also
known as PCMU/PCMA), GSM, G.723.1, G.729A/B.
Configure Vocoders in a preference list that is included with the same preference
order in SDP message. Enter the first Vocoder in this list by choosing the
appropriate option in “Choice 1”. Similarly, enter the last Vocoder in this list by
choosing the appropriate option in “Choice 8”.
Jitter Delay
Jitter Buffer Delay is pre-configured and can not be changed.
Special Feature
Default is Standard. Choose the selection to meet special requirements from Soft
Switch vendors.
S
AVING THE CONFIGURATION CHANGES
After the user makes a change to the configuration, press the “Update” button in the Configuration Menu.
The LCD will then display the following screen to confirm saved changes.
Grandstream recommends to power cycle the IP phone after saving changes.
R
EBOOTING THE PHONE REMOTELY
Press the “Reboot” button at the bottom of the configuration menu to reboot the phone remotely. The LCD
will then display the following screen to confirm reboot is underway.
Wait 30 seconds to log-in again.
Grandstream Networks, Inc. GXP–2020 User Manual Page 29 of 32
Firmware 1.1.4.3 Last Updated: 06/2007