Tadiran Telecom EMERALD ICE, Installation & Maintenance Manual

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Emerald ICE Installation & Hardware Reference Manual
2-11
System
Design
2
The 6CO Board is installed in the dedicated position of the 610+2 Board/Base
Board. The 6CO interfaces 6 loopstart CO (Central Office [Telephone Company])
lines. One 6CO Board is installed in KSU1. An additional 6CO Board can be added
for a total of 12 loopstart CO lines. Two 6CO Boards may be installed in KSU2.
Therefore, the Emerald ICE system CO line capacity may be expanded to interface
24 total loopstart CO lines.
The 6CO module is shipped with four (4) mounting stand ‐ offs used to install the
board into the KSU1 or KSU2.
Each CO line circuit incorporates over ‐ voltage protection, ring detector, loop
detector, loop/pulse ‐ dial relay, current sink circuit, coupling/isolation transformer
(impedance 600:600), hybrid circuit, CODEC & filter, polarity guard circuit and
Radio Frequency noise filter.
The sixth CO Line port is equipped with CNG Fax Tone Detection circuitry. When
programmed as a “FAX” line, this circuit will automatically engage the FAX Tone
detector. If FAX tone is detected, the call is routed to the analog port designated as
the destination for fax calls.
Figure 2-9 6CO Board
2.9
6CO Board (Central Office Module - 6 Circuits)