Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide 105
4
 
SIP Debug Option SIP messages are received at or sent from the proxy listen 
port. This feature controls which SIP messages to log. Choices 
are as follows:
• none—No logging. 
• 1-line—Logs the start-line only for all messages. 
• 1-line excl. OPT—Logs the start-line only for all messages 
except OPTIONS requests/responses. 
• 1-line excl. NTFY—Logs the start-line only for all messages 
except NOTIFY requests/responses. 
• 1-line excl. REG—Logs the start-line only for all messages 
except REGISTER requests/responses. 
• 1-line excl. OPT|NTFY|REG—Logs the start-line only for all 
messages except OPTIONS, NOTIFY, and REGISTER 
requests/responses. 
• full—Logs all SIP messages in full text. 
• full excl. OPT—Logs all SIP messages in full text except 
OPTIONS requests/responses. 
• full excl. NTFY—Logs all SIP messages in full text except 
NOTIFY requests/responses. 
• full excl. REG—Logs all SIP messages in full text except 
REGISTER requests/responses. 
• full excl. OPT|NTFY|REG—Logs all SIP messages in full text 
except for OPTIONS, NOTIFY, and REGISTER requests/
responses. 
Defaults to none.
Refer Target Bye 
Delay
For the Refer Target Bye Delay, enter the appropriate period of 
time in seconds.
Defaults to 0.
Sticky 183 If this feature is enabled, the IP telephony ignores further 180 
SIP responses after receiving the first 183 SIP response for an 
outbound INVITE. To enable this feature, select yes. Otherwise, 
select no.
Defaults to no.
Parameter  Description