User guide

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• SIPDistinctiveRingNames
• SIPProtocolTimers
SIP Protocol Parameters:
Parameter Description Default
sip user agent User-Agent header for outbound
responses if not empty
DKTCOMEGA 3.27
sip require user name Require username to match for
incoming calls
Disabled
sip local port Local UDP port used for send-
ing/ receiving SIP call control
messages
5060
sip public external ip address ForceaspecicexternalIP
address for SIP messages sent
(disabled when 0.0.0.0)
0.0.0.0
sip public external sip port ForceaspecicexternalUDP
port for SIP messages sent (disa-
bled when 0)
0
sip tos value Type of service (TOS) value or
DIFFServ DSFIELD used for SIP
messages as a hexidecimal value
0x68
sip accept language string Speciesthelanguageforuser
viewable messages used in the
SIP accept message
(empty)
sip send response to src port Respond to the sender’s IP
address/UDP port used by SIP
request message
Enabled
sip max forwards Maximum forward value 15
sip ringing retransmit Enables ringing invite retrans-
mission
Enabled
sip use nat discovery Enable use of NAT discovery
procedures to obtain an external
IP address/UDP port mapping for
SIP messages
Enabled
sip use received via info Use VIA header IP address/UDP
port parameters in received
messages as external IP address/
UDP port
Disabled
sip nat keep alive enable Send periodic SIP messages to
keep port mapping active
Disabled
sip nat keep alive interval Periodic interval in seconds for
SIP keep alive messages
15
sip nat keep alive domain name Fullyqualieddomainname
(including an optional port num-
ber) for the destination of SIP
keep alive message (sends to the
proxy server if empty)
(empty)
sip nat keep alive message Type of message to be sent as
SIP keep alive: empty, notify or
register
(empty)