Baud rate problems

[Steve McPheters]

I am having a problem with a computer that seems to be stuck on one baud
rate.



Whenever I use a program to dial out on the modem. It always connects at
33600. I can manually dial out using AT commands and it will work, but it is
almost as though there is a setting some where in Windows XP that is causing
the modem to lock in on 33600. I have pasted the log from a session:



8-09-2006 15:57:49.291 - File: C:\WINDOWS\system32\tapisrv.dll, Version
5.1.2600

08-09-2006 15:57:49.291 - File: C:\WINDOWS\system32\unimdm.tsp, Version
5.1.2600

08-09-2006 15:57:49.291 - File: C:\WINDOWS\system32\unimdmat.dll, Version
5.1.2600

08-09-2006 15:57:49.291 - File: C:\WINDOWS\system32\uniplat.dll, Version
5.1.2600

08-09-2006 15:57:49.301 - File: C:\WINDOWS\system32\drivers\modem.sys,
Version 5.1.2600

08-09-2006 15:57:49.301 - File: C:\WINDOWS\system32\modemui.dll, Version
5.1.2600

08-09-2006 15:57:49.301 - File: C:\WINDOWS\system32\mdminst.dll, Version
5.1.2600

08-09-2006 15:57:49.301 - Modem type: U.S. Robotics V.92 Fax Win Int

08-09-2006 15:57:49.301 - Modem inf path: oem10.inf

08-09-2006 15:57:49.301 - Modem inf section: Modem1807_2K

08-09-2006 15:57:49.301 - Matching hardware ID:
pci\ven_12b9&dev_1007&subsys_00c212b9&rev_00

08-09-2006 15:57:49.331 - 115200,8,N,1, ctsfl=1, rtsctl=2

08-09-2006 15:57:49.331 - Initializing modem.

08-09-2006 15:57:49.341 - Send: AT<cr>

08-09-2006 15:57:49.341 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.341 - Interpreted response: OK

08-09-2006 15:57:49.351 - Send: AT&F1&A0&C1&D2E0Q0V1S0=0+pig=0<cr>

08-09-2006 15:57:49.361 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.361 - Interpreted response: OK

08-09-2006 15:57:49.371 - Send: AT+ILRR=1;+MR=1;+ER=1;+DR=1<cr>

08-09-2006 15:57:49.371 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.371 - Interpreted response: OK

08-09-2006 15:57:49.381 - Send:
ATS7=60S19=0L0M1+ES=3,0,2;+DS=3,0;+IFC=2,2;B0X4<cr>

08-09-2006 15:57:49.391 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.391 - Interpreted response: OK

08-09-2006 15:57:49.391 - 1200,7,O,1, ctsfl=1, rtsctl=2

08-09-2006 15:57:49.391 - Initializing modem.

08-09-2006 15:57:49.401 - Send: AT<cr>

08-09-2006 15:57:49.411 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.411 - Interpreted response: OK

08-09-2006 15:57:49.421 - Send: AT&F1&A0&C1&D2E0Q0V1S0=0+pig=0<cr>

08-09-2006 15:57:49.421 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.421 - Interpreted response: OK

08-09-2006 15:57:49.431 - Send: AT+ILRR=1;+MR=1;+ER=1;+DR=1<cr>

08-09-2006 15:57:49.441 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.441 - Interpreted response: OK

08-09-2006 15:57:49.451 - Send:
ATS7=60S19=0L0M1+ES=3,0,2;+DS=3,0;+IFC=2,2;B0X4<cr>

08-09-2006 15:57:49.451 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:57:49.451 - Interpreted response: OK

08-09-2006 15:57:49.461 - Dialing.

08-09-2006 15:57:49.471 - Send: ATDT#####<cr>

08-09-2006 15:58:07.278 - Recv: <cr><lf>+MCR: V34<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Informative

08-09-2006 15:58:07.278 - Recv: <cr><lf>+MRR: 33600<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Informative

08-09-2006 15:58:07.278 - Recv: <cr><lf>+ER: LAPM<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Informative

08-09-2006 15:58:07.278 - Recv: <cr><lf>+DR: V42B<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Informative

08-09-2006 15:58:07.278 - Recv: <cr><lf>+ILRR: 1200<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Informative

08-09-2006 15:58:07.278 - Recv: <cr><lf>CONNECT 33600<cr><lf>

08-09-2006 15:58:07.278 - Interpreted response: Connect

08-09-2006 15:58:07.278 - Connection established at 33600bps.

08-09-2006 15:58:07.278 - Error-control on.

08-09-2006 15:58:07.278 - Data compression on.

08-09-2006 15:58:16.301 - Hanging up the modem.

08-09-2006 15:58:16.301 - Hardware hangup by lowering DTR.

08-09-2006 15:58:16.361 - Detected CD dropped from lowering DTR

08-09-2006 15:58:17.363 - Timed out waiting for response from modem

08-09-2006 15:58:17.373 - Send: ATH<cr>

08-09-2006 15:58:17.533 - Recv: <cr><lf>NO CARRIER<cr><lf>

08-09-2006 15:58:17.533 - Interpreted response: No Carrier

08-09-2006 15:58:17.543 - Send: ATH<cr>

08-09-2006 15:58:17.553 - Recv: <cr><lf>OK<cr><lf>

08-09-2006 15:58:17.553 - Interpreted response: OK

08-09-2006 15:58:17.553 - Session Statistics:

08-09-2006 15:58:17.553 - Reads : 0 bytes

08-09-2006 15:58:17.553 - Writes: 0 bytes

 

[Bob I]

A few things to remember about modems.
1. The connection MODEM to MODEM is the one that BOTH support.
2. 115000 is the internal speed or serial port connection between the PC
and the MODEM (NOT modem connection speed)
3. "56k connections" (or anything above 33.6 actually) require a digital
phone line on the HOST modem.

Given the above any "peer to peer" connection will at best only connect
at 33.6k