The release note was wrong. It should have read:
The modem code in ComOS 3.9b26 is the same modem code included in
ComOS 3.9b12 and 3.9b22 for the PortMaster 3.
149.198.110.66> ver
Lucent PortMaster PM-3 ComOS 3.9b22
System uptime is 4 minutes
M0: Controller Firmware Version: 518902
^^^^^^
M0: Controller Firmware Checksum: c355
149.198.110.66> ver
Lucent PortMaster PM-3 ComOS 3.9b26
System uptime is 3 days 42 minutes
M0: Controller Firmware Version: 518902
^^^^^^
M0: Controller Firmware Checksum: c355
>>* Modem code fixes:
>>
>> - A downward spiraling upstream rate caused by an incorrect Link
>> Access Procedure for Modems (LAPM) error check is fixed.
>>
>> - Rate reduction due to LAPM errors has been made less sensitive.
>>
>> - In the presence of LAPM retransmission errors, the modem code
>> retrains to allow the link to adjust to a lower speed and improve
>> throughput.
>>
>> - The number of disconnections from LAPM retrains within a retrain
>> has been reduced.
>>
>> - The modem code now suspends LAPM transactions during any rate
>> changes or retrains and thereby eliminates some connection
>> failures, connections without error control, and some
>> disconnections.
>>
>> - U.S. Robotics (USR) Telepath V.34 modems can now establish
>> LAPM error correction. Previously under certain conditions, the
>> modem was choosing too high a connection rate and was unable
>> to establish LAPM error correction. The modem code now detects
>> these conditions and forces the connection speed down by one rate
>> to allow LAPM to be negotiated.
>>
>> - For all modems, retrain detection has been improved to prevent some
>> client disconnections.
>>
>> - For modems with Rockwell Semiconductor Systems (RSS) K56flex
>> chipsets, fast rate changes now work properly. Previously, a retrain
>> was forced after a rate change. (RSS is now Conexant Systems Inc.)
>>
>> - A NO EC (no error control) connection problem with Cirrus Logic
>> modems is fixed, and overall performance with Cirrus Logic
>> modems is improved. Cirrus Logic modems are now supported by
>> Ambient Technologies.
>>
>> - The number of rate renegotiations with USR/3Com and Cirrus
>> Logic modems has been reduced because ComOS now allows
>> the client modem to specify spectral shaping.
>>
>> - USR/3Com modem connections are now more reliable.
>>
>> - Rate renegotiation and retrain problems with USR/3Com and Rockwell
>> HCF modems are fixed.
>>
>> - Connectability with USR/3Com and Rockwell HCF modems and
>> LT Winmodems is improved.
>>
>> - Motorola SM56 modems can now connect with V.90.
>>
>> - A V.90-to-V.34 fallback problem, which can result in a disconnection,
>> is fixed by earlier V.34 detection.
>>
>> - A-law V.90 connectability is improved.
>>
>> - K56flex connectability is improved by an increase in a K56flex timeout.
>>
>
>**********************************************************************
>Mike Tancsa * mike@sentex.net
>Sentex Communications Corp, * http://www.sentex.net/mike
>Cambridge, Ontario * 519 651 3400
>Canada *
>
>
>
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