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- Path: sobt.ao.net!user
- From: eric@ao.net (Eric Shaw)
- Newsgroups: comp.dcom.modems
- Subject: Re: Supra will offer upgrade to 33.6!
- Date: Sat, 24 Feb 1996 13:26:53 -0500
- Organization: Access Orlando
- Message-ID: <eric-2402961326530001@sobt.ao.net>
- References: <312172b0.302209@uchinews.uchicago.edu> <4ftaot$rpc@shellx.best.com> <31226a7d.63749347@uchinews.uchicago.edu> <4g182k$1mu2@navajo.gate.net> <31243778.561299@uchinews.uchicago.edu> <4g3t66$26um@hopi.gate.net> <dan.878.312C8AD9@supra.com> <4gl4d7$1nss@seminole.gate.net>
- NNTP-Posting-Host: sobt.ao.net
-
- In article <4gl4d7$1nss@seminole.gate.net>, dhaire@gate.net (doug haire) wrote:
-
- >Dan Moore (dan@supra.com) wrote:
- >: The default setting is %E0 (do not initiate retrains based on line
- >: conditions) and %G1 (do initiate rate renegotiations based on line
- >: conditions). This is exactly what you want the modem to do, quickly adjust
-
- >However, is there not a time when a retrain is important to do? And why
- >would you restrict your own modem from doing this, leaving it dependent
- >upon the remote modem to be one that does NOT restrict this?
- >
- >If there is no time that this would be useful, why is it an option at all?
-
- I am not sure on this, but I think if the modem decides that the sudden
- change in line quality was bad enough to warrant a full retrain rather
- than a rate renegotiation, and the remote modem does not support this
- feature, it may cause the connection to be lost completely. I found that
- if I issue an ATO1 instead of an ATO to force a retrain while going into
- online mode, it *consistently* will disconnect when connected to a PPI
- modem. It does not appear to depend on what state v.42 is in when the
- command is issued, as some have suggested - ATO1 causes a disconnect every
- time, due to "loss of carrier", while an ATO to go back online works.
-
- The modem *DOES* test the line and do rate renogotiations with %E0 set
- (and %G1), because if you set the S192.5=1 to see which end is initiating
- the retrains, you see as many L's followed by up or down arrows indicating
- locally initiated rate change as you do R's followed by double arrows
- indicating remotely initiated rate change.
-