I was thinking some OS's just killed the modems to end a ppp session, but not sure.
From 3com knowledgebase:
Explanation of carrier Loss(4): The modem detected a loss of the remote modem's carrier and waited the time duration specified in Register S10. This register's default is 0.7 seconds. For higher speed modulations, carrier loss detection is disabled when other recovery mechanisms are used (such as retraining). It is rare to see this disconnect or fail to connect reason because other reasons are usually used or are detected sooner. --- So maybe this number is irrelevant if we're using retraining (x2/v90), but may be relevant on older slower modems? You still have yours set to 7? I seem to recall setting old quads to 70 at one point. Randy
-----Original Message----- From: owner-usr-tc@lists.xmission.com [mailto:owner-usr-tc@lists.xmission.com]On Behalf Of Mark Thornton Sent: Wednesday, October 24, 2001 10:08 AM To: usr-tc@lists.xmission.com Subject: Re: (usr-tc) Upgraded TC's
I have noticed the high number of no carrier reasons as well, but the measure that works for me is that our phones just aren't ringing with connect problems. Usage is up, new customers get on immediately, and old ones aren't calling and complaining. I've wondered if the no carrier reasons come from other things such as autodialers for telemarketers and the like.
Mark Thornton San Marcos Internet, Inc 512-393-5300
----- Original Message ----- From: "Randy Cosby" <dcosby@infowest.com> To: <usr-tc@lists.xmission.com> Cc: <mark@corridor.net> Sent: Wednesday, October 24, 2001 11:00 AM Subject: RE: (usr-tc) Upgraded TC's
You mention a change in the carrier detect delay with the new code. The default is 7 for carrier detect delay and 6 for the carrier loss detect delay. Is that what you have? After looking through the disconnect stats, we have more "no carrier" disconnect reasons than I'm comfortable with. I'm wondering if there is a better number here.
thanks,
Randy
-----Original Message----- From: owner-usr-tc@lists.xmission.com [mailto:owner-usr-tc@lists.xmission.com]On Behalf Of Mark Thornton Sent: Thursday, October 11, 2001 12:59 PM To: usr-tc@lists.xmission.com Subject: Re: (usr-tc) Upgraded TC's
10 HiperDSP's - hardware version .49 & .53, software version 3.1.7 2 HiperArc - hardware version 21, 128 meg ram, 16 meg flash, software version 5.2.102 1 HiperNMC - hardware version 5, 16 meg ram, 16 meg flash, software version 8.2.7 Total Control Manager 8.2.6 Integrated fan chassis Dual 70 amp power supplies
This is essentially TCS 4.3 code. We have asked 3Com for the 4.5 beta which provides the V.92 functionality. Our contract is with Source Technologies which like I said have been very good to deal with.
The new TCM is very fast, or that may be the HiperNMC. All the software installed without any problems at all. A number of the things we were told to change in the configuration such as the carrier detect delay have already been set in the defaults. The only thing I have not yet gotten to work is the redundant HiperArc configuration, but I am waiting on info from SourceTech to set that up. I haven't messed with the new router configuration software as I do it by command line, but there is a new release of it as well. There is no update to the quad code, but that doesn't matter as dropping the quads has apparently resolved some of our random connection problems. We are running the DSP's with both channelized T's and PRI's at this time.
Mark Thornton San Marcos Internet, Inc 512-393-5300
----- Original Message ----- From: "Wayne Barber" <barberw@tidewater.net> To: <usr-tc@lists.xmission.com> Sent: Thursday, October 11, 2001 10:47 AM Subject: Re: (usr-tc) Upgraded TC's
Can you give a list of equipment you installed onto? I'm assuming you mean the new TCS 4.3 code level. I want to talk to management about replacing the quad modems with HiperDSPs, and it would be nice to know that we have the right stuff.
On 11 Oct 2001 at 10:36, Mark Thornton wrote:
We jsut upgraded our TC chassis to the lastest available code (yes we paid for support) and the phones have stopped ringing. We always had a certain level of calls with various connection problems of one sort or another, but that seems to have dried up in the week since we installed the new code.
We made the decision to go with the paid support over replacement of our chassis strictly on financial grounds. There was no way to amortize new equipment costs for our dialup market. Yes, it blows to have to pay for something others get for free, however I must say the support I have gotten is so much better than what I ever got from 3Com directly. There has been no backlash from the new code that I have found which is also a welcome change.
Mark Thornton San Marcos Internet, Inc 512-393-5300
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Wayne Barber Coastal Telco Services
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