Polycom realpresence 1800 Administrator's Manual page 564

Server Network Port Usage Summary
Connection Port
Type Number
RTCP 49152 -
59999
SIP -TLS 5061
Polycom, Inc.
Protocol Description
UDP RTP control.
The ports are dynamically allocated.
TCP SIP -TLS for SIP server, alternate
SIP server, outbound proxy and
alternate outbound proxy.
IP Network Services
Configurable
Yes - It is configured in the
Fixed Ports section of the
IP service.
No
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