Panasonic KX-TD500 System Reference Manual page 17

5.00 Service Cards Description
Extension cards
Proprietary Integrated Line Circuit (PLC) Card;
This card interfaces 8 Analog Proprietary
Integrated Telephones (APITS/DSS) consoles
and the TDM (Time Division Method) bus. It is
available to connect 8 APITS, DSS consoles to
the system per PLC card.
Digital Proprietary Integrated Line Circuit (DLC)
Card;
This card interfaces 16 Digital Proprietary
Integrated Telephones (DPITS) and the TDM
bus. It is available to connect 16 DPITS to the
system per DLC card.
Single Line Telephone Line Circuit (SLC) Card;
This card interfaces 8 Single Line Telephones
(SLT) and the TDM bus. It is available to connect
8 SLTs to the system per SLC card.
SLC Card with Message Waiting (MSLC);
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 SLT.
SLC Card with Message Waiting – 16 ports
(ESLC);
This card is the same as the MSLC card except
that it has the capability to connect 16 SLTs.
Hybrid Line Circuit (HLC) Card;
This card interfaces APITS/SLT, DSS consoles
and the TDM bus. It is available to connect 8
APITS/SLT/DSS consoles to the system per HLC
card.
Digital Hybrid Line Circuit (DHLC) Card;
This card interfaces DPITS/APITS/SLT/DSS
consoles and the TDM bus. It is available to
connect 8 telephones and DSS consoles to the
system per DHLC card.
Off Premise Extension Trunk (OPX) Card;
This card interfaces 4 off premise extensions
through off premise extension power unit.
Attendant Console Line Circuit (ATLC) 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
Loop 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.
LCOT Card with Pay-Tone Detection (PCOT);
This card is a version of the LCOT card with the
capability to detect a pay-tone of CO line. This is
useful to charge management with a pay-tone
which is sent from CO line.
LCOT Card with Polarity Reversal Detection
(RCOT);
This card is a version of the LCOT card with the
capability to detect a reversal of CO line polarity.
This is useful for determining the start and
completion of calls.
Ground Start Central Office Trunk (GCOT) 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.
* 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.
Direct Inward Dialing Trunk (DID) Card;
This card interfaces 4 central office trunks
arranged for Direct Inward Dialing (DID) and the
TDM bus.
E&M Card;
This card interfaces 4 E&M lines and TDM bus. It
is available to connect 4 E&M lines to the system
per E&M card.
T-1 Card;
This card interfaces 1 T-1 line and TDM bus. It is
available to connect a T-1 line to the system per
T-1 card. A T-1 line has capacity of 24 voice
conversations.
E-1 Card;
This card interfaces 1 E-1 line (PCM 30) and TDM
bus. It is available to connect a E-1 lines to the
system per E-1 card. A E-1 line has capacity of 30
voice conversations.
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