Polycom realpresence 1800 Administrator's Manual page 542

Default IP Network Service – SIP Servers
Field
Server Domain Name
Port
Outbound Proxy Servers: Primary / Alternate Server Parameter
Server IP Address
Port
When updating the parameters of the SIP Server in the IP Network Service - SIP Servers dialog
box, the Collaboration Server must be reset to implement the change.
16 Click the Security tab.
(This tab is only displayed if the SIP Server field in the SIP Servers tab is set to Specify.)
Polycom, Inc.
Description
Enter the name of the domain that you are using for conferences, for example:
user_name@domain name
The domain name is used for identifying the SIP server in the appropriate
domain according to the host part in the dialed string.
For example, when a call to EQ1@polycom.com reaches its outbound proxy,
this proxy looks for the SIP server in the polycom.com domain, to which it will
forward the call.
When this call arrives at the SIP server in polycom.com, the server looks for
the registered user (EQ1) and forwards the call to this Entry Queue or
conference.
Enter the number of the TCP or UDP port used for listening. The port number
must match the port number configured in the SIP server.
Default port is 5060.
By default, the Outbound Proxy Server is the same as the SIP Server. If they
differ, modify the IP address of the Outbound Proxy and the listening port
number (if required).
Note: When in IPv4&IPv6 or in IPv6 mode, it is easier to use Names instead of
IP Addresses.
Enter the port number the outbound proxy is listening to.
The default port is 5060.
IP Network Services
511