_Replying to a message_
By: Carl Troein <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
On: Wednesday, July 25, 2001, 6:25:32 PM
Re: [Miami] Re: Dialup trouble
Hi Carl,
>>> All you can do when you see that error message is to hang up and dial
>>> again. Been there, done that.
(The message about your IP address could not be resolved, so Miami has to
fall back to your IP address as your host name....)
>> For this one, I don't have to redial, because AFAIK it doesn't prevent me
>> from browsing and such. It's the other one where I have to redial, lost
>> DNS lookup.
Many things don't need your named address, you're numerical one is usually
enough. It tends to be things that want some form of user identification
authentication that look for extra information like your named address
(e.g. dial-in-user-12.yourISPdomainName.com), like IRC servers, etc.
I've had sessions where I've only had an numerical IP address, and
everything that I've wanted to do has worked fine.
CT> If the problem is in any way related to the quality of the phone line,
CT> you might want to try to force the modem to connect at a lower speed.
CT> As far as I recall at least some modems are supposed to lower the
CT> speed automatically when the connection quality drops, but I'm not sue
CT> if that's the case here. On the other hand, if the quality goes up
CT> and down it might be stupid to assume that one fixed bitrate will
CT> always be the best.
Just about all MODEMs are supposed to adjust line speed during a call, if
needed (unless you deliberately disable that option). Also, they should
select an appropriate speed to start from, at the initial connection
handshake. Though some are known to automatically pick a speed that's too
high to be reliable, that doesn't work well during the initial handshake,
disrupting the procedure somewhat.
CT> Oh well, you might want to try to force your modem down to, say, 19200
CT> just to see what effect it has. I have no idea what control sequence
CT> to send to the modem to do that, so you'll have to locate your manual.
I've got a list of generic AT commands on my web site, but be warned, due
to bugs in many web browsers it's not displaying numbers properly, and I
haven't finished updating the kludged page (related to trying to get
numbered lists to start counting from zero, so various lists of command
options have the wrong numbers - significantly wrong).
Most MODEMs will slow down to at least the same speed as your serial port,
so if you set the serial port down slower, the MODEM will not connect at a
faster rate (note that some will, I've seen them).
It is possible that it's not the phone line, or MODEM, but that your
computer system can't reliably run the serial port at whatever rate you're
currently trying to use, and this is a cause of data corruption during the
moment Miami is trying to find your named address, and the process is
compromised enough that the attempt is abandoned by the call still
proceeds.
If your fault-finding telecom troubles, make sure that you disconnect
other items from the phone line (phones, faxes, answering machines, etc.),
and try the MODEM on the line all by itself. Problems can also occur in
premises with long phone lines, and you're in the middle of the line, with
nothing on the far end, and cabling that runs past other electrical
devices.
--
Bye,
Tim.
http://www.picknowl.com.au/homepages/Tim_Seifert/
mailto:[EMAIL PROTECTED]
(Modbury, near Adelaide, South Australia)
Video productions, electronics engineering, service and technical
support, and more. For further information, visit the web site.
*** DO NOT SEND JUNK MAIL ***
--
To unsubscribe send "unsubscribe miami-talk-ml" to
"[EMAIL PROTECTED]". For help on list commands send "help" to
"[EMAIL PROTECTED]".
