Chapter 14 Common Channel Inter-Office Signaling (CCIS)
UNIVERGE NEAX 2000 IPS Request For Proposal (RFP) Reference Guide Page 14-3
Issue 6
Signaling
CCIS uses a common channel to provide the signaling information between two
systems (nodes). The information transmitted in the signaling channel between two
systems includes addressing information, supervisory information, and centralized
network information. This signaling information is to be transmitted between all
network nodes for a fully integrated network.
Addressing
Information
This information includes dialed digits (called number) and calling party
identification. CCIS provides the ability to provide calling number identification or
the name of the calling party to any display station across the network. Users can
screen calls by looking at the display prior to answering the call.
Supervisory
Information
This information includes station status, call set up and termination information.
Network
Information
This information includes centralized billing information, system fault data
messages, message waiting indication control information, voice processing
integration information, and data related to other network feature control.

CCIS and ISDN

Since the first CCIS system was installed in 1985, CCIS has proven to be the most reliable and
versatile proprietary network system available. The delays in achieving nation wide ISDN
compatibility, and the fact that a total global ISDN network is not yet available, exemplify the
true values of an intelligent proprietary CCIS network. Additionally, it is easy to understand that
a global network that only needs to be compatible with one family of telecommunications
products can easily offer much more feature transparency and centralization than a global
network that is intended to be compatible with all telecommunications systems. For this reason
alone, the benefits of a CCIS network are much greater than those of an ISDN network. And
with CCIS, it is possible to create a mixed network of CCIS and ISDN.
Common Channel Interoffice SignalingCommon Channel Interoffice Signaling
(1) 64 Kbps D Channel
(1) 64 Kbps D Channel
(23) - 64 K bps Clear Channel Bearer C hannels
(23) - 64 K bps Clear Channel Bearer C hannels
Office
Office
A
A
Office
Office
B
B