GAI-Tronics L3149B C200 Advanced Deskset - Manual (Page 27)

L3149B (C200) Advanced Tone Remote Desk Set Operation
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Select Call
Select Call is a special MDC1200 type that is used to selectively signal an individual unit or a group of
units. To initiate a Select Call, the operator must press and hold the
TRANSMIT
button or handset PTT
bar. After the unit has transmitted the Select Call, the display shows “***TALK NOW***” on the second
line of the display. The operator may then speak to the target unit. For a non-automatic Select Call, when
the
TRANSMIT
button or handset PTT bar is released, the unit exits the MDC menu
The unit can be programmed with the software for automatic Select Call. This mode of Select Call works
the same as above with one exception. When the
TRANSMIT
button or handset PTT bar is released, the
unit remains in the MDC menu to allow further Select Calls to the same unit. Once the transmission has
been initiated, the operator cannot change the target ID. To exit this mode of operation, see Exiting the
MDC Menu below. Additionally, if the operator desires to selectively call a different unit, the MDC
menu must be exited and reentered.
Exiting the MDC Menu
If a call is acknowledged or not acknowledged, the MDC menu is automatically exited and the desk set
returns to normal operation.
At any time while in the MDC menu, the operator may press the button used to enter the MDC menu to
exit (i.e. the MDC button or a programmed button). If the user does this after initiating the transmission,
it is considered an abort and is logged as such on the printer log. The display shows “***NO ACK***”.
RS-232/Printer Output
The RS-232 output of the desk set is used for logging received and transmitted MDC1200 messages. A
description of the header that appears on the computer monitor is as follows:
I/O: indicates the direction of the message: (I) incoming or (O) outgoing.
ORIGIN: contains the unit ID of the originating device.
DESTINATION: contains the unit ID of the target device.
TIME and DATE: indicate when the message was received or transmitted.
FUNCTION: indicates the type of message encoded or decoded.
STATUS: contains additional information on the message.