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Grandstream Networks, Inc. BT200 User Manual Page 28 of 37
Firmware 1.1.1.14 Last Updated: 12/2006
Session Expiration
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.
Min-SE
The minimum session expiration (in seconds). The default value is 90 seconds.
Caller Request Timer
If selecting “Yes” the phone will use session timer when it makes outbound calls if
remote party supports session timer.
Callee Request Timer
If selecting “Yes” the phone will use session timer when it receives inbound calls
with session timer request.
Force Timer
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.
UAC Specify
Refresher
As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee
or proxy server as the refresher.
UAS Specify
Refresher
As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to
use the phone as the refresher.
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
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.
Account Ring Tone
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.
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
When set to “Yes”, BT200 will automatically switch to speaker when there is an
incoming call.
Allow Auto Answer
by Call-Info
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.
Turn off speaker on
remote disconnect
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.