Polycom SIP 2.2.0 ユーザーズマニュアル

Administrator’s Guide SoundPoint IP / SoundStation IP 

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

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:

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 

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 

 on page 

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://<phoneIPAddress>/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 <Ethernet address>-phone.cfg is 
removed from the boot server.

Configuration file: 
sip.cfg

Specify the external NAT IP address and the ports to be used for 
signaling and RTP traffic.

For more information, refer to 

Web Server 

(if enabled)

Specify the external NAT IP address and the ports to be used for 
signaling and the RTP traffic. 

Navigate to: http://<phoneIPAddress>/netConf.htm#na

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 <Ethernet address>-phone.cfg is 
removed from the boot server.