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5.00 Service Cards Description
Extension cards
lntearated Line Circuit (PLC) Card;
card interfaces 8 PITS telephones/DSS
This
consoles and the TDM bus.
It is available to connect 8 PITS telephones, DSS
consoles to the system per PLC card.
This card interfaces 8 SLT type telephones and
the TDM bus.
It is available to connect 8 SLT telephones to the
system per SLC card.
SLC Card with Messaae Waitina (SLC-MI;
This card is the same as the standard SLC card
except that it has the capability to turn on and off
the message waiting lamp of a Single Line
Telephone.
Hvbrid Line Circuit (HLC) Card;
This card interfaces PITS/SLT
DSS consoles and the TDM bus.
It is available to connect 8 PITS/SLT telephones/
DSS consoles to the system per HLC card.
Off Premise Extension Trunk (OPX) Card;
This card interfaces 4 off premise extensions
through off premise extension power unit.
Attendant Console Line Circuit IATLC1 Card;
This card interfaces 2 Attendant Consoles and
the TDM bus.
It is available to connect 2 attendant consoles to
the system if this card is installed.
CO trunk cards
Looo Start Central Office Trunk (LCOT) Card: *
This card interfaces 8 central office loop start
trunks and the TDM bus.
It is available to connect 8 CO lines to the system
per LCOT card.
With loop start, you seize a line by bridging
through a resistance the tip and ring (both wires)
of your telephone line.
Ground Start Central Office Trunk IGCOT) Card; *
This card interfaces 8 central office trunks and the
TDM bus. It is available to connect 8 CO lines to
the system per GCOT card.
A way of signaling on subscriber trunks in which
one side of the two wire trunk (typically the "Ring"
conductor of the Tip and Ring) is momentarily
grounded to get dial tone.
l
type telephones,
Direct Inward Dialina Trunk (DID) Card;
This card interfaces 4 central office trunks
arranged for Direct Inward Dialing (DID) and the
TDM bus.
T-l Diaital Trunk Card:
This card interfaces 1 T-l line and TDM bus. It is
available to connect a T-l line to the system per
T-l digital trunk card. A T-l line has capacity of 24
voice
1 -A-5
There are two types of switched trunks one can
typically lease from a local phone company-
Loop Start and Ground Start.
You must be careful to order the correct type of
trunk from your local phone company and
correctly install your telephone system at your
end - so that they both match.
conversations.
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