On Sun, 6 Aug 2000, Thomas Habets wrote:
|On Sat, 5 Aug 2000, Clifford Kite wrote:
|
|>The first thing to check is the configuration of the device file,
|>in particular make sure the the UART type configured for it is
|>the actual UART UART that the modem's serial port uses. That would
|>ordinarily be a 16550A, even if the serial port or modem manual or
|>box or actual chip says 16550.
|
|It was 16550A, but when I set it to 16550 it worked.
|
|Is 16550 bad for 56k modems?
A real 16550 is bad for any modem. I'm at a lost to say why configuring
the device file UART to 16550 allowed the connection to work since
very few true 16550 UARTs were manufactured (they were buggy). It's an
extraordinary occurrence and it may mean that the serial port is very old.
The 16550 configuration *might* work for a 16450 UART but that's old
too, with only a 1 byte FIFO buffer, and I would expect it to work with
a V.90 modem unless the speed was limited to 19200 or less.
|Also, are these messages anything to give interrest to?
|(they pop up now and then after the connection is up and working.)
|(Looks like pings every 30s)
|
|Aug 6 22:47:04 piggy pppd[286]: sent [LCP EchoReq id=0x1
|magic=0xa2951734]
|Aug 6 22:47:05 piggy pppd[286]: rcvd [LCP EchoRep id=0x1
|magic=0xcbb85a28]
|Aug 6 22:47:34 piggy pppd[286]: sent [LCP EchoReq id=0x2
|magic=0xa2951734]
There are Echo Requests and Responses that can be used to tell when a PPP
link has failed. Somewhere the pppd option "lpc-echo-interval 30" is set,
and perhaps "lcp-echo-failure" as well. See "man pppd" for details.
---
Clifford Kite Not a guru. (tm)
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