Network address translation, Voice mail integration, The phones can work with – Polycom SOUNDPOINT SIP 2.2.0 User Manual

Page 78

Administrator’s Guide SoundPoint IP / SoundStation IP

4 - 30

Configuration changes can performed centrally at the boot server or locally:

Network Address Translation

The phone can work with certain types of network address translation (NAT).

The phone’s signaling and RTP traffic use symmetric ports (the source port in

transmitted packets is the same as the associated listening port used to receive

packets) and the external IP address and ports used by the NAT on the phone’s

behalf can be configured on a per-phone basis.
Configuration changes can performed centrally at the boot server or locally:

Voice Mail Integration

The phone is compatible with voice mail servers. The subscribe contact and

callback mode can be configured per user/registration on the phone. The

phone can be configured with a SIP URL to be called automatically by the

phone when the user elects to retrieve messages. Voice mail access can be

configured to be through a single key press (for example, the Messages key on

Central

(boot server)

Configuration file:
sip.cfg

Specify whether to filter incoming RTP packets by IP address,
whether to require symmetric port usage, whether to jam the
destination port and specify the local RTP port range start.

•

For more information, refer to

RTP

on page

A-49

Local

Web Server

(if enabled)

Specify whether to filter incoming RTP packets by IP address,
whether to require symmetric port usage, whether to jam the
destination port and specify the local RTP port range start.

Navigate to: http:///netConf.htm#rt

Changes are saved to local flash and backed up to <Ethernet
address>-phone.cfg on the boot server. Changes will permanently
override global settings unless deleted through the Reset Local
Config menu selection and the -phone.cfg is
removed from the boot server.