Comdial and FXT Especificaciones Pagina 78

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Central Processor Switched Data Port Configuration
The CPU board provides a dual in-line pin (DIP) switch that enhances installer convenience in setting up data
communications between the FXT and an external data device. It is possible to mismatch the data port
configurations between the FXT and the external device in a manner that prevents data communications from
occurring. The DIP switches provide a hardware way of setting the data configuration to a known set of
parameters without the need for reprogramming the system. With the DIP switch 1 set to ON, the FXT provides
the following data parameters:
Parameter COM 1 COM 2
Baud Rate In 2400 9600
Baud Rate Out 2400 9600
Data Bits 8 8
Stop Bits 1 1
Parity Bits None None
Flow Control None None
Channel Negotiation
Channel negotiation enhances the Primary Rate Interface (PRI) feature by preventing call collisions on both
inbound and outbound calls. If a call originates from within the communications system and the selected
channel is busy, the service provider needs to be able to deny the call or offer an available channel. The Channel
Negotiation feature prevents call collisions by allowing the service provider to offer another channel to
outbound calls if one is available. Conversely, if the service provider is attempting to send a call to a busy
channel on the communications side, the system will not allow the call on that busy channel but offer an
available channel as an alternate. The service provider can either accept this alternate or discontinue the call and
attempt to reestablish it on a channel of its choosing.
There are no programming actions that installers need to take to enable this feature.
Clear Major Alarm Ring
Major alarm rings occur whenever a number of faults exceed a programmed threshold. You can use a telephone
station to clear a major alarm ring by pressing the INTERCOM button and then dialing a feature code (default
code is #09). However, the telephone station must have a class of service (COS) assigned to it that has this
feature enabled. The installer enables this feature through COS programming.
Common Audible Ringer Interface
Relay connections that provide dry-contact closure whenever ringing occurs are available on the central
processor unit circuit board. The relay closure tracks the ringing pattern of the applied ring signal and is
typically used to control an external ringer device. The installer can program the particular ringing assignment
that is tracked, and the ringing assignment can be any one of those that are provided by the flexible ringing
assignment feature.
Also refer to the discussions titled Auxiliary Ringer Interface, External Paging Interface, Flexible Ringing
Assignments, Line Answer From Any Station, and Night Transfer (Of Ringing).
6 – 24 General Description
GCA40–215 General Description
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