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- Path: in-news.erinet.com!news
- From: root@eri.erinet.com (Operator)
- Newsgroups: comp.dcom.modems,comp.dcom.telecom.tech
- Subject: Re: Slower modem connections thru T1/channel bank
- Followup-To: comp.dcom.modems,comp.dcom.telecom.tech
- Date: 20 Feb 1996 23:25:49 -0500
- Organization: EriNet Online 513 436-9915
- Message-ID: <4ge6sd$65f@eri.erinet.com>
- References: <4g5rcc$5gr@mercury.IntNet.net>
- NNTP-Posting-Host: eri.erinet.com
- X-Newsreader: TIN [version 1.2 PL2]
-
- Tim Moloney (moloney@netsrq.com) 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.
- : 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.
- Couple of things...The signal may be too "hot" for the modems coming out of
- the channel bank try placing a 1 or 2 db "PAD" in from of the modem....
-
- Also, the channel banks may be doing a good job of filtering the bandwith
- (POTS lines are from ~300hz to ~3100hz depending on who you ask)
- to see if this might be a problem, call from a USR courier modem
- and view the atY11 command when connecting to the B1 line and then when
- connected to a line traversing the T1 and compare the bandwith
- response between them...
-
- YMMV
- -Luke
-
-