NEC Univerge SV8100 Features And Specifications Manual page 956

Issue 11.0
The UNIVERGE SV8100 uses the NEC proprietary CCIS Peer to Peer protocol over IP to
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communicate between system to system.
The PZ-(X)IPLA/IPLB is required for connections between IP terminals and IP trunks. Only one
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PZ-(X)IPLA/IPLB daughter board can be accommodated per system with a maximum of 128 DSP
resources per system.
The PZ-(X)IPLA/IPLB daughter board is an optional interface package for converting the Real Time
Transfer Protocol (RTP) packets on the IP network to PCM highway. IP telephones are required to be
connected directly to the IP bus. When IP telephones are required to be connected to conventional PCM
based digital circuit, the PZ-(X)IPLA/IPLB converts IP packet signals. The PZ-(X)IPLA/IPLB provides the
digital signal processors (DSPs) for IP stations and trunks.
A DSP provides format conversion from circuit switched networks (TDM) to packet switched networks
(IP). Each voice channel from the circuit switched network is compressed and packetized for
transmission over the packet network. In the reverse direction, each packet is buffered for de-jittering,
decompressed, and sent to the circuit switched network. Each DSP converts a single speech channel
from IP to TDM and vice versa.
The following are examples of DSP allocation:
Calling from IP telephone to a TDM telephone uses one DSP.
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Calling from an IP telephone to another IP telephone that is registered to the same CPU uses no

DSPs.
Calling from a TDM telephone to a TDM telephone uses no DSPs.
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Calling from a TDM telephone and out an IP trunk uses one DSP.

Calling from a TDM telephone across IP K-CCIS to another TDM telephone uses one DSP.
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Calling from an IP telephone across IP K-CCIS to another IP telephone uses two DSP resources at

each location.
As stated earlier in this document, using Encryption (RTPs) or Packet Loss Recovery (PLR) can reduce
the number of available DSPs. Another thing that can reduce the amount of available DSPs is CODEC
choice.
Systems Requirements
Only voice (RTP/RTCP) processing functions are mounted among VoIP functions on the PZ-32IPLA/
IPLB, PZ-64IPLA/IPLB or PZ-128IPLA/IPLB. All call control functions are handled by the CD-CP00-US.
Three daughter boards are offered according to the number of voice channels:
PZ-32IPLA/IPLB Voice channel 32
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PZ-64IPLA/IPLB Voice channel 64
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PZ-128IPLA/IPLB Voice channel 128
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UNIVERGE SV8100
K-CCIS – IP