CHAPTER 1 GENERAL INFORMATION
– 6 – NWA-008853-001 Rev.3.0
97ch1001.fm
SYSTEM OUTLINE
This system can be interfaced with a Public Network or Tie Line Network by No. 7 CCIS Signaling. The
system is configured with the 24/30 channel Digital Trunk Interface (DTI) for digital network or Loop Dial
Trunk (LDT)/2 wire E&M or 4 wire E&M Trunk (ODT) for analog network via MODEM, a Phase Locked
Oscillator (PLO) for digital network synchronization, and a Common Channel Handler (CCH) for receiv-
ing/transmitting common signaling data from/to the distant office. The CCIS trunk (CCT) is also available,
which provides 24/30 channel Digital Trunk Interface and a built-in CCH.
The system can provide a variety of inter-office service features such as Centralized Billing.
To add the Centralized Billing function, an Application Processor (AP) or Built-in SMDR of MP card (for
Local Office only) is required.
This figure shows the system outline of No. 7 CCIS.
System Outline of No. 7 CCIS
2000 IPS
2000 IPS/2400 IPX
24/30 CH 24/30 CHANNEL PCM
DIGITAL LINE
CLOCK SIGNAL
DTI/
CCT
MP
(PLO)
MP
CCH
AP
DTI/
CCT
CCH: Common Channel Handler
PLO: Phase Locked Oscillator
CCT: CCIS Trunk
AP
: Application Processor for Centralized Billing
CCH
SYSTEM OUTLINE
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