> Support > cc:Mail and US Robotics Modems (2 of 2)

8.4.x

cc:Mail and US Robotics Modems (2 of 2)

Subject: Re[5]: US Robotics Sportster 28.8
Author: Ron Herardian at GSS
Date: 02-19-96 19:55

Basically, the USR modems are very friendly to cc:Mail and the &F1 profile requires almost no modifications. I recommend USR Sportster modems for use with cc:Mail.

The string in the last note is correct but USR has made our lives even easier. If you have &F1 you don't need &B1 (fixed DTE speed or serial port rate -- &F1 default), &H1 (transmit on CTS/hardware flow control -- &F1 default), &R2 (receive on RTS/hardware flow control -- &F1 default), &A3 (protocol indicators in CONNECT string, e.g., LAPM, etc. -- &F1 default), or X4 default result codes.

I haven't had a need to manually disable MNP5 (&K3) myself. According to cc:Mail you do need &S1 so the modem controls DSR (the sending modem automatically raises DSR high whenever it has data to send). Personally, I prefer to shorten the dialing tones to speed the connect. Anything over about 44 milliseconds should work fine S11=44). You might need extra long tones (i.e., S11=100) if you have a slow phone switch or if you're dialing Internationally.

If you're tuning your modem string, you may also want to shorten the pauses so that you can fine tune the number of pauses and shave seconds off the dialing time (after setting S8=1, use three 1 second pauses rather than 2 two second ones, etc.). This last bit is better for Mobile users, especially using calling cards (as I do), or testing modems.

At some point there should have be an E0 (do not echo commands) and an S0=0 (pick up immediately on ring -- should not be necessary). Both Q0 (display result codes) and V1 (verbal result codes), however, are &F1 defaults.

I've standardized on USR Sportsters because they seem to be the most trouble-free connecting just about anything to anything.

Ron

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Subject: Re[4]: US Robotics Sportster 28.8
Author: "cc:Mail Interest Group" <CCMAIL-L@listserv.okstate.edu> at INTERNET
Date: 2/12/96 4:36 PM

Here is a string that I have hammered out, it seems to work OK for us. (On the Sportster 28.8 External). Pretty much the string is the same but instead of trusting the Defaults, I specifically tell it what I want. The s11 slows down the touch tone dial speed.

57600/LOCK
MODEM/AT&F1&B1&H1&R2&S1&A3&K3X4S11=100

Also, check the dipswitches on the back of the modem:
ROM BIOS:

ATI7 = SUPERVISOR REV 6.0.4 11/30/94 or later
DSP REV 1.0.5 11/29/94 or later


SWITCHES: (On Back Of Modem)

FFNF NFNN

F=OFF=UP
N=ON=DOWN

Let me know if it is better, worse, or no different for you...

kph

Subject: Re[3]: US Robotics Sportster 28.8
Author: CCMAIL-L@listserv.okstate.edu at INTERNET
Date: 2/12/96 12:12 PM

I, too, am having the same trouble with cc:Mail Mobile but can use the modem for other Web functions with no problems. Please send to list if anyone knows the magic formula.

Subject: Re[2]: US Robotics Sportster 28.8
Author: ::CCMAIL-L@listserv.okstate.edu/ at INET
Date: 02/09/96 06:51 PM

I have a USR 28.8 Dual Standard Courier PCMCIA (PC card) which I am having trouble with cc:Mail Mobile. I got the latest mdm files from Lotus's web site, but it still hasn't helped.

I have not had one single good connection. I can use the modem for lots of other tasks (PPP, Compuserver, AOL, etc).

Any ideas?

Thanks

John Cochran
Internet Systems Manager
Ocean Drilling Program

Subject: Re: US Robotics Sportster 28.8
Author: "cc:Mail Interest Group" <CCMAIL-L@LISTSERV.OKSTATE.EDU> at #Internet
Date: 2/9/96 1:52 PM

I work with one of our subsidiaries on setting up that modem. I'm waiting for them to get back to me on the string we set up. We had to deviate from the Lotus recommendation. As soon as I hear, I'll send the string to the List.

Subject: US Robotics Sportster 28.8
Author: "cc:Mail Interest Group" <CCMAIL-L@listserv.okstate.edu> at
Internet-Mail
Date: 2/8/96 0:41

Is anyone using US Robotics Sportster 28.8 external modems on cc:Mail routers. I'm having a recurring problem of the modem not going back on hook after the call terminates. I would really appreciate any information you can provide. I would really appreciate someone could send me their setup string. I checked the latest Lotus approved string which is "AT&F1&S1" but this isn't working very well.

I'm also having problems getting a Hayes Optima 28.8 to connect to the Sportster. Both ends are running router v5.11.

Thanks for the help.

Tom Petzold
Applied Ordnance Technology
tpetzold@ccmail.aot.com

©1995-2005 by Global System Services Corporation (GSS). Portions of this material are copyright ©1995-1999 by Ron Herardian