5.00 Service Cards DescriptionExtension cardsProrxietaw lntearated Line Circuit (PLC) Card;This card interfaces 8 PITS telephones/DSSconsoles and the TDM bus.It is available to connect 8 PITS telephones, DSSconsoles to the system per PLC card.CO trunk cardsLooo Start Central Office Trunk (LCOT) Card: *This card interfaces 8 central office loop starttrunks and the TDM bus.It is available to connect 8 CO lines to the systemper LCOT card.With loop start, you seize a line by bridgingthrough a resistance the tip and ring (both wires)of your telephone line.Sinale Line Telephone Line Circuit (SLC) Card;This card interfaces 8 SLT type telephones andthe TDM bus.It is available to connect 8 SLT telephones to thesystem per SLC card.SLC Card with Messaae Waitina (SLC-MI;This card is the same as the standard SLC cardexcept that it has the capability to turn on and offthe message waiting lamp of a Single LineTelephone.Hvbrid Line Circuit (HLC) Card;This card interfaces PITS/SLT type telephones,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 extensionsthrough off premise extension power unit.Attendant Console Line Circuit IATLC1 Card;This card interfaces 2 Attendant Consoles andthe TDM bus.It is available to connect 2 attendant consoles tothe system if this card is installed.Ground Start Central Office Trunk IGCOT) Card; *This card interfaces 8 central office trunks and theTDM bus. It is available to connect 8 CO lines tothe system per GCOT card.A way of signaling on subscriber trunks in whichone side of the two wire trunk (typically the “Ring”conductor of the Tip and Ring) is momentarilygrounded to get dial tone.l There are two types of switched trunks one cantypically lease from a local phone company- _Loop Start and Ground Start.You must be careful to order the correct type oftrunk from your local phone company andcorrectly install your telephone system at yourend - so that they both match.Direct Inward Dialina Trunk (DID) Card;This card interfaces 4 central office trunksarranged for Direct Inward Dialing (DID) and theTDM bus.T-l Diaital Trunk Card:This card interfaces 1 T-l line and TDM bus. It isavailable to connect a T-l line to the system perT-l digital trunk card. A T-l line has capacity of 24voice conversations.1 -A-5(70695)M