Cisco IP 7940 Configuration Guide

Cisco IP Phone Configuration Guides
www.yeastar.com Page 6
Figure 2-2
5. Go to the “SIP” tab
6. Go to the “NAT Support Parameters” section
7. Set the “Handle VIA rport” field to “yes”
8. Set the “Insert VIA rport” field to “yes”
9. Set the “STUN Enable” field to “yes”
10. Set the “STUN Server” field to “stunserver.org” – to allow the phone to
discover its external IP Address, and the port mappings that will be applied
to the traffic sent and received by the phone ,the default port is 5060 for
TCP and 10000-12000 for RTP
11. Click the "Submit All Changes" button at the bottom of the page. Your phone
will restart.

Cisco IP 7940 Specifications

General

Audio Codec Support	G.711, G.729a
Speakerphone	Yes
Line Buttons	2
Display	LCD
Protocol Support	SCCP, SIP
Ethernet Ports	2 x 10/100Base-TX
Power Options	Power over Ethernet (PoE), AC adapter
Weight	3.5 lb (1.6 kg)