1. How do two modems negotiate connection speed?
I have problems connecting two systems by modems. After looking into some
log files, I found that one system thinks it is connected at 57.6k(on a
28.8k modem) and the other side does not think it is connected. Can some
one give me some advise?
Here are some details:
Win95 on NEC versa 6000 with 28.8kbps build in modem (from the log, it is
Eagle1) dialing into RAS server on a NT4 with USR Sportster 28.8Kbps
First of all, both modems can dial into ISP and connect fine. when I try to
put the two together, it is where I had problems. When I looked into the
modemlog.txt files on the NT side:
07-11-1997 13:58:02.220 - Send: AT &F1 E0 V1 &C1 &D2 Q0 S0=0 &B1 &A3<cr>
07-11-1997 13:58:02.520 - Recv: <cr><lf>OK<cr><lf>
07-11-1997 13:58:02.530 - Interpreted response: OK
07-11-1997 13:58:02.530 - Send: ATS7=60S19=0L0M1&M4&K1&H1&R2&I0B0X4<cr>
07-11-1997 13:58:02.700 - Recv: <cr><lf>OK<cr><lf>
07-11-1997 13:58:02.700 - Interpreted response: OK
07-11-1997 13:58:02.700 - Waiting for a call.
07-11-1997 13:58:02.700 - Send: ATS0=0<cr>
07-11-1997 13:58:02.831 - Recv: <cr><lf>OK<cr><lf>
07-11-1997 13:58:02.831 - Interpreted response: OK
07-11-1997 13:59:42.594 - Recv: <cr><lf>RING<cr><lf>
07-11-1997 13:59:42.604 - Interpreted response: Ring
07-11-1997 13:59:42.784 - Answering the call.
07-11-1997 13:59:42.784 - Send: ATS0=1<cr>
07-11-1997 13:59:42.915 - Recv: <cr><lf>OK<cr><lf>
07-11-1997 13:59:42.915 - Interpreted response: OK
07-11-1997 13:59:47.922 - Connection established at 57600bps.
07-11-1997 13:59:47.922 - Error-control off or unknown.
07-11-1997 13:59:47.922 - Data compression off or unknown.
the USR Sportster thinks it is connected at 57.6kbps (on a 28.8k modem!!!)
On the Win95 client side modemlog.txt file: the modem did the dialing, but
the client never receive any CONNECT code back, and then complained about
On the NT4 side, the Sportster did pick up the phone when the call came in
and there was the audial handshaking part and then becoame quiet after
Sportster thinks it is connected to the remote but the speed is wrong. It
sends data at that speed and the Eagle1 on the client side receives
Can someone please shed some light on what might be the cause of this?
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