home *** CD-ROM | disk | FTP | other *** search
- Path: hunter.premier.net!insync!news
- From: bubba@insync.net (Bill Garfield)
- Newsgroups: comp.dcom.modems
- Subject: Re: Line quality monitoring?
- Date: Mon, 01 Apr 1996 06:03:39 GMT
- Organization: Associated Technical Consultants
- Message-ID: <315f70cd.39333661@news.insync.net>
- References: <4it9ct$ij7@asgard.actrix.gen.nz> <316029DC.577A@qciar.attmail.com>
- Reply-To: bubba@insync.net
- NNTP-Posting-Host: line-200.insync.net
- X-Newsreader: Forte Agent .99d/32.182
-
- Stephen Liu <AR!AR!Stephen@qciar.attmail.com> wrote:
-
- >Stephen Worthington wrote:
-
- >> Does anyone have any information about how well various 28.8 modems
- >> report line quality information? We are looking for a modem to set up
- >> as part of a system that dials up the local ISP's modems each night and
- >> reports on the quality of the connections (among other things).
-
- >I had measure the line quality information of Rockwell modem chip
- >(AT%Q). In the V.32 bis chipset you can see the %Q value changed with
- >increased S/N, but in V.34 chipset this value somehow is always fixed to
- >33, do not change at all even with modem disconnected due to bad
- >line condition.
-
- As far as scanning line quality from remote, your most accurate results
- will be obtained with something like the USR I_Modem, scanning the lines
- from an ISDN line yourself, thereby taking your own line impairments out
- of the picture.
-
- Of course the results are only relative, still they provide a good
- insight into the less obvious differences between providers. See
- http://www.academ.com/houston/internet/dialup.shtml
- for an example of what I mean.
-
-
-
- +=====================================================================+
- PLEASE CALL THE HOUSTON BETTER BUSINESS BUREAU BEFORE DOING BUSINESS
- WITH THE COMPUTER EXPO STORES IN HOUSTON. HOUSTON BBB: 868-9500 THEN
- ENTER THE MERCHANT PHONE NUMBER. COMPUTER EXPO'S NUMBER IS 531-0990.
- +=====================================================================+
-