Cisco 7800 Series Administration Manual page 294

SIP Settings
SIP Settings
Parameter
SIP Transport
SIP Port
SIP 100REL Enable
EXT SIP Port
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
280
Cisco IP Phone Troubleshooting
Description
Select the transport protocol for SIP messages:
• UDP
• TCP
• TLS
• AUTO
AUTO allows the phone to select the appropriate
protocol automatically, based on the NAPTR records
on the DNS server. See Configure the SIP Transport,
on page 189 for more details.
Default: UDP
The phone's port number for SIP message listening
and transmission.
Specify the port number here only when you are using
UDP as the SIP transport protocol.
If you are using TCP, the system uses a random port
within the range specified in SIP TCP Port Min and
SIP TCP Port Max on the Voice > SIP tab.
If you need to specify a port of SIP proxy server, you
can specify it using the Proxy field
Registration, on page 286) or the XSI Host Server
field (XSI Line Service, on page
Default: 5060
Support of 100REL SIP extension for reliable
transmission of provisional responses (18x) and use
of PRACK requests. Select Yes to enable.
Default: No
The external SIP port number.
(Proxy and
289).