Comdial and FXT Especificaciones Pagina 70

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Auxiliary Equipment Interface (Busy Lead Detection)
One line port on every loop start line board will detect current flow on the line ahead of the common equipment.
When an external device, such as a modem or fax, is connected to this line and is activated, current flow over
the line occurs. When the port detects the current flow, the system causes a busy indication for this line to
appear at every system telephone that has its appearance. Normally, the user cannot interrupt an external device
by pressing the line button or by dialing a line group code; however, if the line is programmed to be
non-private, a user can interrupt the device.
Auxiliary Station Ringer Interface
The central processor unit circuit board includes four dry-contact relay actuations. They may be used for the
following:
Programmable Station Ringer Interface
Paging Enable
Door Relay Lock/Unlock
Zone Night Answer
The relay contacts for the station ringer interface follows the ring pattern of a ringing line or telephone. These
relay contacts close during ringing and open between rings and may be used to control an external signaling
device. The relay contacts for the paging enable and door relay are closed while the activating station is
off-hook and may be used to provide a path for an enabling signal where needed. Contacts on relay 1 is
normally closed when idle and contacts on relays 2, 3, and 4 are normally open when idle.
Also refer to the discussions titled Common Audible Ringer Interface, External Paging Interface, Flexible
Ringing Assignments, Line Answer From Any Station, and Night Transfer (Of Ringing).
B
Background Music (Two Selections)
If the system includes an external music source, telephone users can turn background music on and off at their
stations. The system uses two dedicated audio ports to interface the music sources, one for background music
through the station speakers and the other for music on hold for both lines and intercom numbers. Therefore, the
background music can be different from the music provided to held calls if the system installer connects two
different sources to the system. When the two different choices are available, station users can dial a code to
choose either source for their background music.
Also refer to the discussions titled Music Interface and Music On Hold.
6 – 16 General Description
GCA40–215 General Description
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