>
> pppd is not receiving any response to the LCP requests and
> it gets tired of asking. Using the passive option simply
> tells pppd to wait until it receives ppp packets before
> starting negotiation. Either way, you're getting nowhere
> fast because you are not receiving any data.
>
> My suggestion would be to:
>
> 1. Check your tx packets are actually getting to the external
> device (with a breakout box, a scope, diagnostics on the
external
> modem - whatever.)
>
> 2. If your outbound packets are getting through, trace the path of
> the return packets, back from the modem using the same tools.
>
> Frequent culprits here are the RS232 control lines. Look out
> for your modem needing RTS/CTS before sending data once it is
> on connected mode.
Hi Andy,
Thanks for bringing this to attention.
Is there a method in Linux to record the Serial Port I/O from ttyAM1
to a log file?
Also I was assuming that if I could send the atd*99***1# command and
get OK back, then the Serial communication is OK. But maybe after
the data session is established the flow control is required by the
modem.?
Thanks.
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