1.4 Service Cards Description
System Outline 1-13
1.4.3 Resource Cards
Direct Inward System Access (DISA) Card;
This card interfaces 4 central office trunks arranged for Direct
Inward System Access (DISA) and the TDM bus.
Enhanced Remote Circuit (ERMT) Card;
This card is necessary for accessing the system from a remote loca-
tion. This card supports the V.34 modem standard of ITU-T recom-
mendation.
1.4.4 Other Cards
Doorphone Circuit (DPH) Card;
This card interfaces 4 doorphones and the TDM bus. Up to 4
doorphones can be connected to the system.
Time Switch Conference Expansion Card (TSW Conference) Card;
This card provides 64 additional conference trunks, and is installed
on the TSW card.
Off Hook Call Announcement for Digital Telephone (DOHCA) Card;
This card is for Off Hook Call Announcement features on DPT,
and is installed on the TSW card.
This card is required to utilize “DPT Integration” feature.
Caller ID Card;
This card supports the Caller ID service provided by Central
Office, and is installed on the ELCOT card.
Caller ID allows the extension user to see the name or phone num-
ber of an external caller on the display before answering the call.
Pay Tone Card;
This card supports the Pay Tone Service provided by Central
Office, and is installed on the ELCOT Card.
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