NEC SL1100 Adminstrators Manual page 26

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Whilst only a single RTP and RTCP Port have been specified in each case these signify the starting point
for the allocation of RTP/RTCP port pairs for that resource.
To elaborate the OSO will issue the first port pair 10020 and 10021 to the first call then the second
logical pair 10022 and 10023 to the second call, it will continue to do this for all 16 DSP's which in the
case provisioned above would use the ports up to 10051 which is why 10052 is the first assigned to
the second resource.
SL1100
The NEC SL1100 uses a different VOIPDB card that works using the same configuration as discussed
for the SV8100 but has a maximum capacity of 16 SIP Trunk connections.
Issue 1: 2012© British Telecommunications plc
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