User`s guide

Appendix D: Modem Settings for RS-232 Dial-up PPP Backup
D-2 Local Management User’s Guide
FastPro-II Modem Configuration
Origination Modem Configuration
The caller side must be configured for the following:
• DTR off to on transition causes modem to automatically dial previously stored phone number.
• Data mode of operation set to call is placed using the asynchronous call establishment
command set. Once the call connection is established, switch to synchronous mode for
transmission.
• DSR follows/tracks CD.
Use the Extended AT(tention) command set listed in the following table to configure the modem:
NOTE
In all of the following tables, each command is preceded by the AT keyword. For
example, AT&C1.
Command Action
&C1 Carrier on after link established (normally the default setting).
&D2
Enables automatic dialing. When:
DTR on - go off hook (place call).
DTR off - go on hook (hang-up).
&M1 Selects asynchronous command mode/synchronous data mode.
&R1
Selects Real synchronous mode, Real asynchronous mode, and AT command mode
(normally the default setting).
&S2 Sets DSR to follow Carrier Detect (CD).
%Z1 Enables automatic dialing when DTR off-to-on.
&Z1=nnn
Store the specified remote phone number, including any dial command modifiers. e.g., the
area code in user configuration profile number 1. Up to nine digits can be entered, i.e., n=
0 to 9.
&Y1 Selects user configuration profile #1 to load as the default profile at power-up.
&W1 Save the above settings as user configuration profile number 1.