Tadiran Telecom EMERALD ICE, Installation & Maintenance Manual

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Emerald ICE Installation & Hardware Reference Manual
System
Design
2
The 12EKT module expands the Emerald ICE system capacity of digital ports
Deluxe & Standard Telephones and DSS Consoles. Each digital port is comprised
of a proprietary octal ASIC (Application Specific Integrated Circuit) transceiver.
There are three data channels in operation at each digital port via the octal
transceiver. One channel is used for call processing control of digital terminal
functions/operations and two channels are used for the digital voice channel
requirements. The 12EKT is controlled directly from the 610+2 Board/Base Board.
Each digital station interface is protected against circuit wiring shorts by an
over ‐ current protection Polyswitch. The digital station circuit requires only one
cable pair to operate and is not polarity sensitive.
Physical connection of digital port terminals (Deluxe & Standard Telephone and
DSS) to the 12EKT module is made through a 25 ‐ pair amphenol connector along
the top edge of the module.
1 Additional 12EKT module can be added to KSU1 and 2 in KSU2.
Figure 2-8 12EKT Card
2.8
12EKT (Digital Port Module - 12 Circuits)