Technical data

Tech Note: Configuring a Modem for an ADR
Copyright © 2012 Peek Traffic Corporation. All rights reserved.
Page 6 of 11
99-363, 3
Purpose of the Command Typical command Notes
Hang-up on loss of DTR &D2 This also has the affect of not allowing the modem to
answer a call unless the DTR line has been asserted by
the ADR. See the Application Note below describing the
process in which a modem connection is established
with the ADR.
Program flow control refer to the
manual for the
modem
You need to make sure that these flow control settings
are configured:
• disable software flow control
• disable hardware flow control
• and disable modem to modem flow control
(Flow control is not necessary with the ADR, since its
protocol (ACK-NAK) addresses this function.)
Auto-reliable mode refer to the
manual for the
modem
The modem attempts to establish an error-correcting
connection but will then fall back to a normal connection.
Fixed serial port baud
rate
refer to the
manual for the
modem
The modem’s serial port baud rate remains fixed, it does
not get altered based on the modem connection speed
on the phone line.
Enable data
compression
refer to the
manual for the
modem
If it's available. This is not available on all modems.
Enable auto-retrain refer to the
manual for the
modem
If it's available. This is not available on all modems.
Auto answer on first ring S0=1 The modem should attempt to establish a connection as
soon as a RING is detected.
Time to answer S7=90 Configure the modem to attempt to answer for 90
seconds after the RING is detected.
Save the configuration &W0 Save the above configuration settings to the modem's
memory. This ensures that the next time the modem is
shut off and turned back on, it will return to the proper
parameters.
7. Once you have configured the modem setup file to your liking, select File > Save to save the changes.
Now that you have a properly configured modem file, continue on to the next section to load the file's configuration into
your modem.