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6-24 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)
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• If the far-end switch from a System 75 or Generic 1 is a System 85, Generic 2, or DIMENSION PBX and
if a 5-digit dialing plan is used with AAR that routes the first two digits to an RNX, intermachine tie
trunks must be administered at the System 75 or Generic 1. If the first two digits are routed to a trunk
access code, rather than RNX, intermachine tie trunks are not necessary. DCS transparency is still
preserved.
• The AVD tie trunk associated with the PI signaling link for a System 75 or Generic 1 should be in its
own unique trunk group. Access tie or tie is the recommended type. Communications type should be
designated as ‘‘avd’’, and the only member of this tie trunk group should be the tie trunk.
• The following features do not work transparently from a System 85, Generic 1, or Generic 2 to a
DIMENSION PBX.
— Call Coverage Tone
— Call Forwarding—Busy and Don’t Answer
— Leave Word Calling (With/Without AP).