Maintenance Architecture
555-233-143
1-18 Issue 1 May 2002
Conference, Transfer, and Call-Forwarding
Denial
If a station or attendant attempts to connect parties without disconnect
supervision together, the following is possible:
■ Digital Station or Local Attendant Transfer
If a digital station attempts to transfer the two parties together, the
call-appearance lamp flutters, indicating a denial. If transferring over a
DCS trunk, the denial may drop the call since the transfer is allowed, and
the other system is queried for disconnect supervision.
■ Analog Station Transfer
If an analog station attempts to transfer two parties together by going
on-hook, the analog station is no longer on the call and the transfer cannot
be denied.
■ Centralized Attendant Service (CAS) Attendant Transfer
If a CAS attempts to transfer two parties together by pressing the release
key, the release link trunk is released and the branch attempts a transfer by
going on-hook.
■ Station Conference/Dropout
If a station conferences every party, the conference is allowed since the
station has disconnect supervision. When the station is dropped from the
call, the call is dropped since the other parties do not have disconnect
supervision.
■ Station Call Forwarding
If a station is call forwarded off-premise to a trunk without disconnect
supervision, the calling party without disconnect supervision is routed to
the attendant.
NOTE:
ADU means Asynchronous Data Unit
BCS means Business Communications System
MSA means Message Server Adjunct
ACU means Automatic Call Unit
Transmission Characteristics
The system’s transmission characteristics comply with the American National
Standards Institute/Electronic Industries Association (ANSI/EIA) standard
RS-464A (SP-1378A). The following tables list some general transmission
characteristics of the switch.
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