Cisco SPA942 - - IP Phone Administration Manual page 116

5
STEP 9
STEP 10
114
SIP
Back in the tab, select yes in the
View the debug messages to determine if your network uses symmetric NAT. Look
for the Warning header in REGISTER messages, for example, Warning: 399 Spa
"Full Cone NAT detected."
Click Submit All Changes.
Configuring SIP, SPCP, and NAT
Network Address Translation (NAT) and Cisco IP Phones
STUN Test Enable
Cisco SPA and Wireless IP Phone Administration Guide
drop-down box.