5686G-PRO User Guide
Page
53
of
94
Copyright © 2018 USR, a Division of UNICOM Global
Command
Function
&C
n
Controls how the modem sends a Carrier Detect (CD) signal to your computer.
&C0
CD always ON, even if the modem is not on line.
&C1
Normal operations. The modem sends a CD signal when it connects
with another modem and drops the CD when it disconnects.
&D
n
Control how the modem responds to Data Terminal Ready (DTR) signals.
&D0
DTR is always ON (ignored).
&D1
If issued before connecting with another device, the Courier Lite 56K
Business Modem can enter online Command mode during a call by
dropping DTR.
&D1 functions similarly to the escape code (+++).
Return online with the On command, or hang up with the Hn
command.
&D2
Normal DTR operations. The modem will not accept commands unless
your computer sends a DTR signal. Dropping DTR ends a call.
&D3
Modem resets with DTR toggle.
&F
n
Load one of the three configuration templates that are stored permanently in read-
only memory. Refer to the Flow Control Template section for the settings for each
template.
To load a template into current memory, enter AT&F
n
. To write a template to
NVRAM, enter AT&F
n
&W0 or AT&F
n
&W1.
If DIP switch 7 is ON, &F0 is always loaded into memory at power-on or reset.
&F0
Load No Flow Control template settings.
&F1
Load Hardware Flow Control template settings.
&F2
Load Software Flow Control template settings.
&G
n
Set guard tones for international calls.
&G0
No guard tone. Use this in the United States and Canada.
&G1
This sets a 550 Hz guard tone, and is used in some European countries.
&G2
This sets an 1800 Hz guard tone, and is used in the U.K. and some
Commonwealth countries. &G2 requires the B0 setting.