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5.6
Connect with 108.1 control
In addition to the switch control you may choose to control the
modem with the V.24 108.1 circuit. 108.1 is a signal at the V.24
interface directed from DTE (Terminal) to DCE (modem). Notice that
this signal is located at the same pin (at the V.24 connector) as the
108.2 signal.
If the modem is set-up for 108.1 control it will connect to line when
the signal switches from off to on state. Before using this signal you
should set-up which channel to use, or if the modem should dial a
number when 108.1 turns from off to on. When
108.1 turns off after a
connection is made, the modem will disconnect from line. Often the
108.1 contro! will be convenient when using synchronous data
equipment where 108.1 control is possible.
The 108.1 control is disabled in default configuration. The command
+E1 will turn the 108.1 control on and
the commands +&EC and
+&ED will set-up this function.
108.1 control may be set-up both for switched and leased line. See
description of SETUP menu for setup of this function.
5.6.1
Example:
Using data equipment with a synchronous port connected to the
modem. The software in this equipment will turn 108.1 on and
then wait a fixed time for the DCD (Carrier Detection) to turn on.
If DCD doesn't turn on before time-out, the software will turn
108.1 off again before redialing.
If the RI (Ring indicator from modem) is detected the software
will answer the call by turning 108.1 on.
The modem should be set-up in manual (DUMB) synchronous
mode with 108.1 control using SETUP menu. The menus below
will be of special interest for this etup. Also see the complete
setup menu later in this chapter.
LZTR104006 R1.00
5-9
Zat 14.4/14.4-7 and Zat 19.2/19.2-7
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