1.4 Service Cards Description
1-12 System Outline
1.4.1 Extension Cards
Digital Hybrid Line Circuit (DHLC) Card;
This card interfaces DPTs/APTs/SLTs/DSS consoles and the TDM
bus. It provides 8 telephones and DSS consoles to the system per
DHLC card.
Digital Proprietary Integrated Line Circuit (DLC) Card;
This card interfaces 16 Digital Proprietary Integrated Telephones
(DPT) and the TDM bus. It provides 16 DPTs to the system per
DLC card.
SLC Card with Message Waiting (ESLC);
This card interfaces 16 Single Line Telephones (SLT) and the TDM
bus. It provides 16 SLTs to the system per ESLC card. It has the
capability to turn on and off the message waiting lamp of an SLT.
1.4.2 Trunk Cards
E&M Card;
This card interfaces E&M lines. (4 circuits/card)
E&M type : Type 5
Transmission : 2 wire/4wire (Programmable)
Signaling : Pulse/DTMF
E-1 Card;
This card interfaces 1 E-1 line and the TDM bus. It is available to
connect an E1 line to the system per E-1 card. An E-1 line has a
capacity of 30 voice conversations.
Enhanced Loop Start Central Office Trunk (ELCOT) Card;
This card interfaces 8 central office loop start trunks and the TDM
bus. It provides 8 CO lines to the system per ELCOT card. With
loop start, a line is seized by bridging through a resistance the tip
and ring (both wires) of the telephone line.
This card supports Caller ID service or Pay Tone service.
ISDN Basic Rate Access Interface (BRI) Card;
This card interfaces ISDN Basic Access line (2B+D).
It is available to connect 8 BRI-ISDN lines to the system per BRI-
ISDN card. A BRI-ISDN line has capacity of 2 voice conversations.
ISDN Primary Rate Access Interface (PRI30) Card;
This card interfaces ISDN Primary Access line. (1 circuit/card)
A PRI-ISDN line has capacity of 30 voice conversations.
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