Tadiran Telecom EMERALD ICE, Installation & Maintenance Manual

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Emerald ICE Installation & Hardware Reference Manual
2-9
System
Design
2
The 4SLT Board provides four separate analog device ports. This allows the
Emerald ICE to support auxiliary office equipment found on the business premises
such as fax machines, PC/Mac modems and analog telephones (single line
telephones). The 4SLT Board generates ‐ 30VDC and 20 ‐ 25Hz, 50V square wave
ringing for operation.
The 4SLT Board is equipped with a Heartbeat LED that indicates processing
activity on the PCB. (The 4SLT Board peripheral processor is operating when the
Heartbeat LED is flashing.)
The 4SLT Board provides DTMF receivers for each analog port. Ancillary analog
devices connected to 4SLT analog ports must generate DTMF signaling. (Pulse dial
(rotary ‐ dial) telephones/equipment are not supported.) All connections are via
RJ ‐ 11 connectors along the top edge of the module.
Up to 2 ‐ 4SLT Boards may be installed on 610+2 Board and up to 2 in the
Expansion Cabinet.
Figure 2-7 4SLT Board
2.7
4SLT Board (Analog Port Module-4 Circuits)