nanog mailing list archives
Re: Busy Connect
From: John Leong <johnleong () research bell-labs com>
Date: Thu, 28 Jan 1999 10:38:44 -0800
"No answer", to me, as an ISP customer would mean that there is a broken modem somewhere that is not answering the
phone.
Definitely different than "Busy."
The modem return code, unfortunately is often not precise. After dialing, if it gets any voice response, be it some human answering because of mis-dialed, message from the phone company offering to retry when line is free, annoucement of "As of <day>, the area code you called will be change to <XXX>", and finally annoucment of "All circuits are busy, please retry latter" ... all will result in a "no answer" return code as the modem expects and not getting the commencement of the modem hand shake sequence. All such voice reponses have nothing to do broken modem ... and the last case is actually a busy condition that cannot be correctly handled by most modem (the Courier has the capability to return a "voice" return code ... but cannot, for good reason, tell you what is the nature of the voice message). This had been a pain in the rear end to me in my previous project. I will be happy to share with anyone my experience with modems ... but let's take this off line. Best Regards, John Leong --------------------------------------------------------- Bell Labs Research johnleong () research bell-labs com 4995 Patrick Henry Dr. Tel: 408-567-4459 Santa Clara, CA 95054 Fax: 408-567-4448
Current thread:
- Busy Connect William Allen Simpson (Jan 27)
- [no subject] Sean Patrick Gorman (Jan 27)
- Re: Busy Connect John Leong (Jan 27)
- Re: Busy Connect Steven J. Sobol (Jan 27)
- Re: Busy Connect John Leong (Jan 28)
- Message not available
- Re: Busy Connect Jay R. Ashworth (Jan 30)
- Re: Busy Connect Steven J. Sobol (Jan 27)
- Re: Busy Connect Phil Howard (Jan 27)
- <Possible follow-ups>
- Re: Busy Connect Dean Anderson (Jan 27)
- Re: Busy Connect Steven J. Sobol (Jan 27)
- Re: Busy Connect Andrew Brown (Jan 27)
- Re: Busy Connect Steven J. Sobol (Jan 27)
- Re: Busy Connect William Allen Simpson (Jan 27)
- Re: Busy Connect Jared Mauch (Jan 27)
- Re: Busy Connect Steven J. Sobol (Jan 27)
- Re: Busy Connect Roeland M.J. Meyer (Jan 27)
- Re: Busy Connect Jared Mauch (Jan 27)