Co Trunk Cards - Panasonic KX-TD500 Installation Manual

1.4.2 CO Trunk Cards

Loop Start Central Office Trunk (LCOT) Card (KX-T96180);
This card interfaces 8 central office loop start trunks and the TDM bus. It provides 8 CO lines
to the system per LCOT card. With loop start, a line is seised by bridging through a resistance
the tip and ring (both wires) of the telephone line.
Ground Start Central Office Trunk (GCOT) Card (KX-T96181);
This card interfaces 8 central office trunks and the TDM bus. It provides 8 CO lines to the
system per GCOT card.
This card uses a way of signalling 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 a dial
tone.
Direct Inward Dialling Trunk (DID) Card (KX-T96182);
This card interfaces 4 central office trunks arranged for Direct Inward Dialling (DID) and the
TDM bus.
Direct Inward Dialling Trunk with MFC(DID-MFC) Card (KX-T96182CE);
This card is a version of the DID card with the capability to accept MFC signalling.
Both-way Direct Inward Dialling Trunk (DID-2W) Card (KX-T96182D);
This card is a version of the DID card with the capability to accept both dial pulse and touch-
tone signalling. This card can be used for both receiving incoming outside calls and making
outside calls.
LCOT with Polarity Reversal Detection (RCOT) Card (KX-T96183);
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.
E&M Card (KX-T96184);
This card interfaces E&M lines. (4 circuits/card)
EM type : Type 5
Transmission : 2 wire/4wire (Programmable)
Signalling : Pulse/DTMF
System Outline
1.4 Service Cards Description
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