Grandstream Networks BT200 사용자 설명서

 

Grandstream Networks, Inc. 

Page 27 of 35  

Last Updated:  12/2006

 

 

Enable Call Features  Default is No. If set to Yes, Call transfer, Call Forwarding & Do-Not-Disturb are 

supported locally. 

Default is No. If set to Yes, missed calls will not be recorded for your review. 

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.  

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.  

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 signalling 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, BT–200 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”, BT–200 will automatically switch to speaker when there is 
an incoming call.