ZETRON 2000 Series Specifications download pdf (Page 71)

Selecting a Phone Line

Trunk Cards and Connections

Selecting a Phone Line

This section provides information that relates to the telco side of the paging terminal. It

contains detailed connection listings for the RJ21 trunk connectors located on the

backplane of the paging terminal that are used to make the connections to the telephone

company lines. It also tells how the trunk cards operate and how to configure a trunk card

for DID, E&M, or E-E operation. Adjustment procedures are given for the trunk cards as

well as for the optional dial click cards.

This section should help you and your telephone expert provide an appropriate telephone

connection. Support Engineers at Zetron are available to help you through the telephone

service selection process. Different types of telephone lines can be connected to the Model

2100/2200, requiring specific interface card settings; End-to-End (loop start or ground

start), selector level, E&M Tie-Trunk, or a local phone.

Support for T1 Trunks

When the number of telephone lines being brought into a single location grows large

enough, it becomes very attractive to switch to a more efficient method of supporting the

call density. The Digital T1 Interface option for the 2000 Series paging terminals provides

a way to do this. The initial and on-going costs for a T1 trunk are significantly lower than

those for the equivalent number of conventional lines or trunk lines. The installation of the

T1 interface is sufficiently different from the typical trunk cards that it is covered in its

own documentation. For detailed information about installing this option, please see the

2000 Series T1 Interface Technical Manual, part number 025-9271.

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ZETRON 2000 Series Specifications Page 71