Voice Mail User ID
Send DTMF
Early Dial
Dial Plan Prefix
Enable Call
Features
Disable
Session Expiration
Caller Request
Timer
Callee Request
Timer
Force Timer
UAC Specify
Refresher
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
When configured, user will be able to dial voice mail server by pressing “MSG” button.
This parameter specifies the mechanism to transmit DTMF digit. There are 3 modes supported: in audio which means DTMF is combined in audio signal (not very reliable with
Default is No. Use only if proxy supports 484 response.
Sets the prefix added to each dialed number.
Default is No. If set to Yes, Call transfer, Call Forwarding &
Default is No. If set to Yes, missed calls will not be recorded for your review.
Grandstream implemented SIP Session Timer. The session timer extension enables SIP sessions to be periodically “refreshed” via a SIP request (UPDATE, or
Session Expiration is the time (in seconds) at which the session is considered timed out, if no successful session refresh transaction occurs beforehand. The default value is 180 seconds.
The minimum session expiration (in seconds). The default value is 90 seconds.
If selecting “Yes” the phone will use session timer when it makes outbound calls if remote party supports session timer.
If selecting “Yes” the phone will use session timer when it receives inbound calls with session timer request.
If selecting “Yes” the phone will use session timer even if the remote party does not support this feature. Selecting “No” will allow the phone to enable session timer only when the remote party support this feature. To turn off Session Timer, select “No” for Caller Request Timer, Callee Request Timer, and Force Timer.
As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or proxy server as the refresher.
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