Avaya S8700 Maintenance Manual page 1033

AUX-TRK (Auxiliary Trunk)
An Auxiliary Trunk circuit pack contains four ports and uses DTMF signaling. A
different hardware interface between the switch and the auxiliary equipment is
used for the four types of signaling that the auxiliary trunk circuit pack supports.
The interface used for the MultiVantage loudspeaker paging consists of the
following three pairs:
The Tip-Ring (T-R) pair used for voice transmission.
The S (S-S1) pair that carries answer supervision and/or make busy
information.
The SZ (SZ-SZ1) pair that provides the external equipment with a seizure
indication.
The interface used for recorded announcement, dictation, and other loudspeaker
paging consists of the following two pairs:
The Tip-Ring (T-R) pair used for voice transmission.
The S (S-S1) pair that carries answer supervision and/or make busy
information.
The interface used for Music-On-Hold consists of one pair:
The Tip-Ring (T-R) pair used for voice transmission.
The interface, used for automatic wake-up using an Audichron
recorder/announcer unit, consists of the following two pairs:
The Tip-Ring (T-R) pair used for voice transmission.
The S (S-S1) pair that carries the synchronization signal.
555-233-143 Issue 1 May 2002 8-311