How to config a USR 56k modem to recieve dial-in calls 1

[felixkoh71]

does anyone know the init string for USR modems in order to recieve a dial in call to the Pabx.

 

[jgideon]

This is a copy of something I picked up along the way. Assumes 9600b N81 speed on the PBX... you may want to omit the password stuff. Fortunately, I haven't had to implement it, so your mileage may vary...
Switches
1 ON DTR Always on
2 OFF Verbal result codes
3 OFF Suppress result codes
4 ON Don't echo offline commands
5 OFF Auto answer
6 OFF Normal carrier detect
7 ON Display result codes only when originating
8 ON Smart mode (enable AT command set)
9 OFF Disconnect on +++
10 OFF Load NVRAM configuration


ATB0 ITU V25 answer sequence
ATF1 Online echo off
ATM1 Speaker on
ATX4 Level of error codes
AT&A1 Display ARQ result codes
AT&B1 Fixed serial port rate
AT&H3 Use both h/w and s/w flow control
AT&I0 Disable XON/XOFF flow control
AT&K1 Use auto enable/disable of data compression
AT&L0 Normal line type
AT&M5 Error control ARQ asynchronous mode
AT&N0 Variable connection rate
AT&R0 RTS flow control (RTS/CTS delay)
AT&S0 DSR always on
AT&T5 Deny RDL test of modem
AT&U0 Select V.PCM
AT&X0 Modem sends transmit clock timing to DTE
AT&Y1 Destructive break handling
AT%N6 Synchronous offline clock for V25 @ 9600bps


AT%A0=<PASSWORD>,y,n,n, Set up account with password
AT%L=PW0 Set admin. account to above
ATS53.2=1 Enable local access security
ATS53.0=1.1=1 Enable password prompting


S11=070 Dialled tones length
S39=010
S40=000
S41=001 Number of allowable remote login attempts
S58=004
S59=000

 

[nmarple]

some of those commands and switches are kind of extraneous but ignore the one or two missing switches (on most USR 56K modems switch 7 and 9 you indicated aren't there) and ignore the AT% commands that give you errors and you should still be OK.

I got mine to work but also turning the autoanswer switch ON and I also turned on the NVRAM switch rather than the factor default and wrote the config to my NVRAM memory slots with AT&W0 and AT&W1. Worked just fine.

Nickolas