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- Path: news.bright.net!news
- From: suhrig@bright.net (Steve Uhrig)
- Newsgroups: comp.dcom.modems,comp.dcom.telecom.tech
- Subject: Re: Slower modem connections thru T1/channel bank
- Date: Wed, 21 Feb 1996 00:45:34 GMT
- Organization: BrightNet Ohio
- Message-ID: <4gdpqj$am6@cletus.bright.net>
- References: <4g5rcc$5gr@mercury.IntNet.net>
- NNTP-Posting-Host: 205.212.115.104
- X-Newsreader: Forte Free Agent 1.0.82
-
- moloney@netsrq.com (Tim Moloney) wrote:
-
- >I'm a small ISP and I recently converted my dial-in lines from individual B1
- >lines to a T1 broken out by a Carrier Access Corp AB-24 channel bank. The
- >typical modem connect speed before the conversion was 24000 to 26400. Now
- >the typical connect speed is 21600 to 24000. I've also had a few customers
- >report drastically reduces connect speeds. These customers report 9600 to
- >14400.
-
- >For testing, I've dialed into one of my T1 channels from another channel in
- >the T1 and consistently get connect speeds of 21600 and 24000. I then dialed
- >into one of my T1 channels from a B1 line and consistently get connect speeds
- >of 24000 and 26400.
-
- >Apparently the T1 is causing some sort of slowdown in the modem connections.
- >I would think that the T1 would provide a cleaner connection and thus higher
- >connect speed.
-
- What type of channel units is the T1 equipped with? What
- band pass filter is in the units? Are the channels equipped
- with precision balance networks or compromise balance
- networks, and have they been properly set up at both ends?
- Does the termination impedance of the channel units match
- the impedance of your equipment?
-
- With the answers to the above questions your problem can be
- isolated.
-
-
-
-
-
- -----------------------------------------
- Steve Uhrig
-
- Chillicothe, Ohio USA
- -----------------------------------------
-
-