Grandstream Networks BT200 Session Expiration Min-SE Caller Request Timer Callee Request Timer

Session Expiration

Min-SE

Caller Request Timer

Callee Request Timer

Force Timer

UAC Specify

Refresher

UAS Specify

Refresher

Force INVITE

Enable 100rel

Account Ring Tone

Send Anonymous

Auto Answer

Allow Auto Answer by Call-Info

Turn off speaker on remote disconnect

The SIP Session Timer extension enables SIP sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE. Once the session interval expires, if there is no refresh via a UPDATE or re-INVITE message, the session is terminated.

Session Expiration is the time (in seconds) at which the session is considered timed out, provided 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.

As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use the phone as the refresher.

Session Timer can be refreshed using INVITE method or UPDATE method. Select “Yes” to use INVITE method to refresh the session timer.

The use of the PRACK (Provisional Acknowledgment) method enables reliability to be offered to SIP provisional responses (1xx series). This is very important if PSTN internetworking is to be supported. A user’s wish to use reliable provisional responses is invoked by the 100rel tag which is appended to the value of the required header of initial signaling messages.

There are 4 different ring tone that are defined:

System Ring Tone: when selected, all calls will ring with system ring tone.

Customer Ring Tone 1 to 3: when selected, BT200 will ONLY play this ring tone for all the incoming calls for this account.

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.

When set to “Yes”, BT200 will automatically switch to speaker when there is an incoming call.

Default is No. If set to Yes, auto answer depends on the Call-Info in the SIP message. This feature needs the support of IP-PBX.

Default is No. If set to Yes, the speaker will turn off, and the phone will go back to idle status, after the other party of the call hands up.

Grandstream Networks, Inc.	BT200 User Manual	Page 28 of 37
	Firmware 1.1.1.14	Last Updated: 12/2006