PLANET VIP-350PT User Manual
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R T P
P o
r
t
B
a
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e
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2 -
6 5 5
3 4
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8 0 0
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Port Range
Configure the number of ports which RTP will be used for media transport. It is an offset from the
pre-configured Base port. Each channel takes 2 ports, one for RTP and the other for RTCP
session. Conventionally, the RTP will use an even UDP port, and the RTCP will use a UDP port
one higher than that of RTP. As a result, the range specified here should be an even number and
at least doubles the lines equipped on the phone. For example, if the phone has two lines, then the
least port range requirement is 4. We suggest that a value that triples the lines should be more
suitable as a minimum requirement; however, it accepts a value between 2 and 100 to
accommodate single line configuration.
Default is 16
R T P
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PTP IP ToS
Specify the IP type-of-service (ToS) bits of RTP packets transmitting voice streams.
The IP ToS bits consist eight bits:
7 (MSB)
6
5
4
3
2
1
0(LSB)
Precedence Delay
Throughput Reliability
Reserved
(00)
Where MSB denotes “Most Significant Bit” and LSB denotes “Least Significant Bit”.
1.
Bits 5-7 specify the precedence:
• 111 - Network Control
• 110 - Internetwork Control
• 101 - CRITIC/ECP
(RTP default)
• 100 - Flash Override
• 011
-
Flash
(RTCP default)
• 010 – Immediate
• 001 – Priority