Re: (ASCEND) Ascend Disconnect Performance

[mike@sentex.net (Mike Tancsa)]

On 18 Mar 1999 12:46:05 -0500, in sentex.lists.ascend you wrote:

>On Thu, 18 Mar 1999, Mitchell Arnone wrote:
>
>> We have been running two MAX TNTs for over a year and recently purchased 
>> Navis Access.  With Navis, and other "Log Watching" tools we have been able 
>> to understand more about the disconnect codes and progress codes.   In our 
>> attempt to become more proactive to network/dial-in problems we have 
>> identified some Disconnect/Progress code combinations that could indicate a 
>> systemic problem.  For instance, a 185 Disconnect with a progress of 31 
>> basically states that the two modems were unable to shake hands (no modem 
>> tone) so the TNT disconnected.  A 10 disconnect with a progress of 31 
>> indicates the same problem differing only in that it is the client which 
>> hangs up first.  On average, about 10% of our total analog disconnects are 
>> either a 185/31 or 10/31, although there have been times when this 
>> percentage has been as high as 30%  with users hollering.  Ascend has 
>> acknowledged that problems like this could possibly be addressed in a 
>> recent release of TNT firmware but this is not meant to imply that all such 
>> codes will disappear after the upgrade.  Also, there are other disconnect 
>> causes that have given us concern as well.
>> 
>> We are seeking to compare notes with other TNT users to see what kind of 
>> disconnects they are receiving and at what percentages.
>
>	Well, we don't use TNTs but with about 150 Max4048, the
>combination c=185 & p=31 plus c=10 & p=31 account for 3.5% of all
>disconnected calls.

This is very interesting to me. We are currently using Livingston PM3s and
are seeing about 10% of our users sessions terminating abnormally... Either
a Call Circut Closed, or a Lost Carrier.   Does your 3.5% figure include
all abnormal terminations, or just the above 2 mentioned ?

e.g. here is one PM3 for a month.

                                           normal  90.48%  30314/33502
             "User Request - Call Circuit Closed"   8.07%   2703/33502
                                   "Lost Carrier"   0.82%    276/33502
         "User Error - PPP NCP Active to Request"   0.60%    201/33502
"Service Unavailable-Failed to detect V.42 remote"  0.01%      5/33502
          "User Error - LAPM negotiation timeout"   0.01%      2/33502
"Port Error - Exceeded LAPM retransmission limit"   0.00%      1/33502


	---Mike
Mike Tancsa  (mdtancsa@sentex.net)		
Sentex Communications Corp,   		
Waterloo, Ontario, Canada
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