NEC Univerge SV8100 Features And Specifications Manual page 858

Issue 8.01
The UNIVERGE SV8100 uses the NEC proprietary CCIS Peer to Peer protocol over IP to

communicate between system to system.
The PZ-(X)IPLA is required for connections between IP terminals and IP trunks. Only one PZ-

(X)IPLA daughter board can be accommodated per system with a maximum of 128 DSP resources
per system.
The PZ-(X)IPLA 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 converts IP packet signals. The PZ-(X)IPLA 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.

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.

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.

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,
PZ-64IPLA or PZ-128IPLA, and 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 Voice channel 32

PZ-64IPLA Voice channel 64

PZ-128IPLA Voice channel 128
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2 - 830
UNIVERGE SV8100
K-CCIS – IP