Cisco 521SG - Unified IP Phone VoIP Administration Manual page 116

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
SIP 100REL Enable
EXT SIP Port
Auth Resync-
Reboot
SIP Proxy-Require
SIP Remote-Party-
ID
Referor Bye Delay
Refer-To Target
Contact
Description
Support of 100REL SIP extension for reliable
transmission of provisional responses (18x) and use of
PRACK requests. Select yes to enable. Otherwise, select
no. Defaults to no.
The external SIP port number substituted for the actual
SIP port in all outgoing SIP messages. If 0 is specified, no
SIP port substitution is performed. Defaults to blank. The
range is from 0 to 65535.
The Cisco IP phone authenticates the sender when it
receives a NOTIFY message with the following requests:
resync
reboot
report
restart
XML-service
Select yes to enable. Otherwise, select no. Defaults to
yes.
SIP proxy for each extension or behavior when an
extension sees this header from the user agent. If this
field is configured and the proxy does not support it, it
responds with the message, unsupported. Enter the
appropriate header in the field provided. For example,
com.nortel.networks.firewall.
The Remote-Party-ID header to use instead of the From
header. Select yes to enable. Otherwise, select no.
Defaults to yes.
Time when the Cisco IP phone sends BYE to terminate
stale call legs upon completion of call transfers. Multiple
delay settings (Referor, Refer Target, Referee, and Refer-
To Target). Enter the appropriate period of time in
seconds. Defaults to 4.
Indicates the refer-to target. Select yes to send the SIP
Refer to the contact. Otherwise, select no. Defaults to no.
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