Hi John,
I would have thought that if the modem was truly locked up you would have received
busy tone from the PSTN switch.
What might have occurred is that the modem on release (DCD down) might not have
dropped DSR back to the PC or whatever device. You calling the modem it answered DCD
ca
You're probably right. We tried dialing in to it many, many times and it
would answer but it would not negotiate with the modem on our end; we would
just get silence.
It's interesting that dialing in with a modem would not cause it to reset,
but dialing in on a phone and then sending random tone
I'll see what I can find out. I've never heard of anyone doing this before,
and neither had the other engineer who was here with me. We tried to dial
in at least 10 times, and we did wait each time for negotiation to start but
it never did. The modem would "answer" because the ringing stopped,
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