Polycom UC Software Administrators' Guide - 4.1.0

Table 13-92: RTP Port Parameters
Parameter Permitted Values Default
tcpIpApp.port.rtp.filterByIp 1 0 or 1 1
Chapter 13: Configuration Parameters
IP addresses can be negotiated through the SDP or H.323 protocols. If set to 1, the phone rejects RTP
packets that arrive from non-negotiated IP addresses. Note: the H.323 protocol is supported on only the
VVX 1500 phones.
tcpIpApp.port.rtp.filterByPort 1 0 or 1 0
Ports can be negotiated through the SDP protocol. If set to 1, the phone will reject RTP packets arriving
from (sent from) a non-negotiated port.
tcpIpApp.port.rtp.forceSend 1 0 to 65535 0
Send all RTP packets to, and expect all RTP packets to arrive on, this port. If 0, RTP traffic is not forced
to one port. Note: Both tcpIpApp.port.rtp.filterByIp and tcpIpApp.port.rtp.filterByPort
must be set to 1 for this to work.
tcpIpApp.port.rtp.mediaPortRangeStart 1 even integer 1024 to
65440
The starting port for RTP packets. Ports will be allocated from a pool starting with this port up to a value
of (start-port + 47) for a voice-only phone or (start-port + 95) for a video phone.
Note: Ensure that there is no contention for port numbers. For example, do not use 5060 (default port for
SIP).
1 Change causes phone to restart or reboot.
This parameter enables the configuration of TCP keep-alive on SIP TLS connections; the phone
can detect a failure quickly (in minutes) and attempt to re-register with the SIP call server (or its
redundant pair).
Table 13-93: TCP Keep-Alive Parameters
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Parameter Permitted Values Default
tcpIpApp.keepalive.tcp.idleTransmitInterval 10 to 7200 30
The amount of time to wait (in seconds) before sending the keep-alive message to the call server.
Note: If this parameter is set to a value that is out of range, the default value is used.
Note: On the VVX 1500 phone, tcpIpApp.keepalive.tcp.idleTransmitInterval is the number of
seconds TCP waits between transmission of the last data packet and the first keep-alive message.
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