User's Manual
Firmware Version 1.0.0.5 
UCM6510 IP PBX User Manual 
Page 152 of 192 
which can direct the call to a specific context if desired. By default, all 
domains  are  accepted  and  sent  to  the  default  context  or  the  context 
associated  with  the  user/peer  placing  the  call.  Register  to  non-local 
domains will be automatically denied if a domain list is configured. Up to 
10 domains can be added. 
From Domain 
Configure the domain in the "From:" header of the SIP message. It may 
be required by some providers for authentication. 
Auto Domain 
If enabled, the UCM6510 will add local host name and local IP to domain 
list. The default setting is "No". 
Allow External Domains 
If  enabled,  requests  for  external  domains  that  are  not  served  by  the 
UCM6510 will be allowed. The default setting is "Yes". 
SIP SETTINGS/MISC 
Table 52: SIP Settings/Misc 
Outbound SIP Registrations 
Register Timeout 
Configure the register retry timeout (in seconds). The default setting is 
20. 
Register Attempts 
Configure  the  number  of  registration  attempts  before  the  UCM6510 
gives up. The default setting is 0, which means the UCM6510 will keep 
trying until the server side accepts the registration request. 
Video 
Max Bit Rate (kb/s) 
Configure  the  maximum  bit  rate  (in  kb/s)  for  video  calls.  The  default 
setting is 384. 
Support SIP Video 
Select to enable video support in SIP calls. The default setting is "Yes". 
Generate Manager Events 
If enabled, the UCM6510 will generate manager events when SIP UA 
performs events (e.g. Hold). The default setting is "No". 
Reject Non-Matching INVITE 
If enabled, when rejecting an incoming INVITE or REGISTER request, 
the  UCM6510  will  always  reject  with  "401  Unauthorized"  instead  of 
notifying the requester whether there is a matching user or peer for the 
request.  This  reduces  the  ability  of  an  attacker  to  scan  for  valid  SIP 
usernames. The default setting is "No". 
SIP SETTINGS/SESSION TIMER 
Table 53: SIP Settings/Session Timer 
Session Timers 
Select the session timer mode. The default setting is "Accept". 
The options are: 










