Polycom SIP 3.1 manual Network Address Translation, Corporate Directory, nat/ on page A-120

Administrator’s Guide SoundPoint IP / SoundStation IP

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

Central	Configuration file:	Specify whether to filter incoming RTP packets by IP address,
(boot server)	sip.cfg	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 <rtp/> on page A-57.
Local	Web Server	Specify whether to filter incoming RTP packets by IP address,
	(if enabled)	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.cfgon the boot server. Changes will permanently
		override global settings unless deleted through the Reset Local
		Config menu selection and the <Ethernet address>-phone.cfgis
		removed from the boot server.

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:

Central	Configuration file:	Specify the external NAT IP address and the ports to be used for
(boot server)	sip.cfg	signaling and RTP traffic.
		• For more information, refer to Network Address Translation
		<nat/> on page A-120.
Local	Web Server	Specify the external NAT IP address and the ports to be used for
	(if enabled)	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.cfgon the boot server. Changes will permanently
		override global settings unless deleted through the Reset Local
		Config menu selection and the <Ethernet address>-phone.cfgis
		removed from the boot server.

Corporate Directory

Note	This feature requires a license key for activation. Using this feature may require
	purchase of a license key or activation by Polycom channels. For more information,
	contact your Certified Polycom Reseller.

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