Pbx Application For Trunk Port Connection (Employs Pbx Trunk-To-Trunk Transfer) - Toshiba VP 300 Installation Instructions Manual

11-4 Installation and Maintenance Manual
Figure 11-2 is a PBX configuration for Secondary Answering. In this configuration, the PBX is
programmed to forward a call for busy or unanswered stations to an outgoing PBX trunk
connected to a DAC port. Then, the PBX sends DTMF signals representing the called station's
extension or mailbox over the tip and ring leads of the outgoing PBX trunk connected to the
DAC port.
For this configuration to function properly, the PBX must be capable of several options:
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Toshiba VP Systems Release 6.1 February, 1993
The PBX must allow external calls (incoming trunk) to a PBX station to be forwarded on
busy or ring-no-answer (RNA) to an outgoing PBX trunk.
The PBX must allow callers on incoming trunks to be transferred to outgoing PBX trunks
without requiring that the transferring party remain on the line (trunk-to-trunk transfer).
The PBX must send the called extension/station number in DTMF signal over the outgoing
trunk (in-band signaling). The outgoing trunk is connected to a DAC port.
Any Type Trunks
CO
Figure 11-2 PBX Application for Trunk Port Connection
(Employs PBX Trunk-to-Trunk Transfer)
This application is also supported by standard line interface cards (LICs) when ports are
programmed in CX mode. This approach allows the VP 300 to transfer callers if desired
but requires callers to reenter the digits they just dialed.
–48 VDC
DAC
VP 300
I/O
Panel
DAC
Interface(s)
Trunk
Ports
PBX
Stations