Grandstream ht-503 ユーザーズマニュアル

 

Grandstream Networks, Inc. 

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sent periodically. 

When set to “Yes”, the “From” header will have value “anonymous”, blocking Caller ID. 
Pre-configured account user Id is put in the P-Asserted-Identity field. 

Default is No.  If set to “Yes”, incoming calls with anonymous Caller ID will be rejected 
with a 486 busy message. 

Default is Standard.  Choose the selection to meet some special requirements from 
Softswitch vendors. 

Grandstream implemented SIP Session Timer. The 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 will be terminated.  
 
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.  

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 HT503 supports 5 different Vocoder types including 

1.  G.711 A/µ law,  (Displayed as PCMA/PCMU) 
2. G.723.1, 

 

3.  G.726 (Supports bit rates 16, 24, 32, and 40)  
4. G.729A/B/E, 

 

5. iLBC 

Users can configure Vocoders in a preference list that will be included with the same 
preference order in SDP message. 

This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps. 

This sets the iLBC size in 20ms or 30ms 

This defines the payload type for iLBC. Default value is 97. The valid range is between 
96 and 127. 

Defines payload type for G726-16.  Default value is 100.  Range is from 96 to 127. 

Defines payload type for G726-24.  Default value is 99.  Range is from 96 to 127. 

Defines payload type for G726-40.  Default value is 103.  Range is from 96 to 127. 

Defines payload type for G729E.  Default value is 102.  Range is from 96 to 127 

Default is No. VAD allows detecting the absence of audio and conserves bandwidth by 
preventing the transmission of “silent packets” over the network. 

Default is No.  When set to “Yes” the device will change the destination to send RTP 
packets to the source IP address and port of the inbound RTP packet last received by 
the device. 

T.38 (Auto Detect) FoIP by default, or fax Pass-Through (must use PCMU/PCMA)