Choose what should happen when the conference admin hangs up: 
either keep communication between the two other parties, or hang 
up the whole conference. 
Select the code to feed back to the server when you reject the call. 
Select the code to feed back to the server when a call is rejected 
because your DND function is enabled. 
Flash Hook Time (< 800 
ms) 
The time for the flash hook. 
When you receive an incoming call while this feature is enabled, 
and you don't answer the call, the caller will receive a time out after 
the here-defined "Called No Answer Time" has elapsed. 
Following RFC2396, the "#" will be interpreted as '#' or as %23 in 
the SIP request method, depending on what you define here. 
Default is 101, RTP Payload for DTMF Digits, Telephony Tones and 
Telephony Signals 
Enable/Disable the P-Asserted-Identity feature. 
The SIP Session Timer T1 settings. 
The SIP Session Timer T2 settings. 
The SIP Session Timer T4 settings. 
The port range settings for SIP, default is 5060. 
Enable/Disable the affiliated port feature. 
Select headset mode as normal or seat. 
Select ring type mode with headset or speaker.