Configuring SIP, SPCP, and NAT
Managing NAT Transversal with Cisco IP Phones
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 145
4
The address and port number must be reachable from the Cisco IP phone. The
port number appears on the output log file name. The default output file is
syslog.514.log (if port number was not specified).
STEP 4 Set the Debug Level to 3.
STEP 5 To capture SIP signaling messages, click the Ext tab and navigate to SIP Settings.
Set the SIP Debug Option to Full.
STEP 6 To collect information about what type of NAT your router uses click the SIP tab
and navigate to NAT Support Parameters.
STEP 7 Click Voice > SIP and navigate to NAT Support Parameters.
STEP 8 Set STUN Test Enable
to yes.
STEP 9 Determine the type of NAT by viewing the debug messages in the log file. If the
messages indicate that the device is using symmetric NAT, you cannot use STUN.
STEP 10 Click Submit All Changes.
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