01-08-2003 09:42 AM
Good luck with the 300bps connection working. We had to find a new modem for a legacy application and went through many modems before finding one which would run at 300. Finally found that a Diamond Supra Express would work.
For what it is worth on a Lucent modem the command would be AT&F0B15N0S37=4 to get V21 at 300bps. On a US Robotics you would do AT&F0&N1S27=1S28=0. You see there is no standard once you get past the basic Hayes codes.
01-08-2003 01:05 PM
You might want to download the latest driver for your modem before going any further:
The driver uses
to set up the modem so if you were talking directly to it you would say:
Note that it will not answer. If you need it to answer then change S0=0 to S0=1
I was able to find a command set for the ESS after all.
01-09-2003 08:31 AM
The link works if you have a pdf reader but it is an older version of the modem.
B0 says (in my manual) that it will use V.22 at 1200 or v.21 at 300. I suppose they could have changed it since they probably assumed no one would ever want to use 300 bps again.
If you want to email the attachment to me I will look at it and see what I can figure out for you. rkinner"at"att"dot"net
01-13-2003 04:44 AM
B0 is still good. You want to use CCITT and not Bell at 300.
To lock it into 300 you also need:
N0 which disables Automode.
S37=1 (or 2 or 3) for 300 bps.
S41=0 to turn off compression
so altogether we have:
in addition to the setup string mentioned earlier. Remember to add AT in front if you are talking directly to the modem.
would be the complete string tho again if using a Window box you would just put
in the Extra Settings box under Connection => Advanced in the Start/Settings/Control Panel/Modem
All this assumes that it really still works at 300.