AT&T Merlin Spezifikationen PDF herunterladen (Seite 17)

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WHEN TO USE DID TRUNKS

DID trunks provide fast access to specific individuals. DID trunks should be considered when a customer

has sales people who work with assigned territories, service people who work with ‘assigned accounts, or

any other organization seeking personal accountability. DID trunks, especially when combined with station

features like bridged appearances, combine the flexibility of key system operation with the sophisticated

options of the LEGEND system.

DID service is not available from all Central Offices, so always check availability before suggesting the

service to a customer. Remember that DID trunks provide incoming service only. For outgoing calls use

ground-start or WATS trunks.

TIE TRUNKS:

Simple Tie Trunk Operation

This application is perhaps the most common instance of the terms “trunk” and “line” being used

interchangeably. This type of facility links two PBXs.

In typical operation a user on the local PBX would like to speak to a station user at a remote PBX over a tie

trunk. The user on the local PBX lifts the handset to his telephone and gets dial tone from the local PBX.

The user dials the access code for the tie trunk, the local PBX connects the telephone to the tie trunk, and

the user on the local PBX hears dial tone from the remote PBX. The local station user then dials the

extension number of the remote user.

The switching capabilities of

both

PBXs are utilized in a call placed over tie facilities, so this facility is

properly called a “trunk.”

\fBSimple Tie Trunk Operation\fR

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AT&T Merlin Spezifikationen Seite 17