NEC UNIVERGE SV9100 General Description Manual page 86

Issue 2.0
K-CCIS – Call Rerouting
The CCIS Call Rerouting feature allows a system to use multiple call routing priorities
when remote system trunks are all busy. The four priorities can be local or remote
trunks. For example using ARS and F-Route table priorities the system can try up to
four remote systems or up to three remote systems and a local trunk to route the
outbound call to its destination. If an outbound route is unavailable for any reason the
call will fall through to the next priority.
K-CCIS – IP
The system uses the GPZ-IPLE daughter board to connect multiple systems together
over a Data Communication IP Network (Intranet). Key-Common Channel Interoffice
Signaling (KCCIS) is used to provide telephony services between the UNIVERGE
SV9100 and another UNIVERGE SV9100 or a NEAX PBX system.
CCIS Networking via IP (Non Peer-to-Peer Connections Basis).
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The GPZ-IPLE is required for connections between IP terminals and IP trunks. Only
one GPZ-IPLE daughter board can be accommodated per system with a maximum
of 128 DSP resources per system.
The GPZ-IPLE 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
GPZ-IPLE converts IP packet signals. The GPZ-IPLE 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.
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IP trunk connections over CCIS Networking via IP provide telephony services
between UNIVERGE SV9100 and UNIVERGE SV9100 and a NEAX IPS, IPX,
SV7000, UNIVERGE SV8100, UNIVERGE SV8300 and UNIVERGE SV8500.
The UNIVERGE SV9100 uses the NEC proprietary CCIS Peer to Peer protocol
over IP to communicate between system to system.
CCIS Networking via IP (Peer-to-Peer Connections Basis)
IP-KCCIS has been improved to support Peer-to-Peer calls between IP
Terminals residing in different offices, without using DSP resources.
Features