Ascend Archive
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Re: (ASCEND) Link-Comp-MS-Stac stops working
At 12:13 PM 11/22/97 -0500, Cyril Jaouich wrote:
>On Fri, 21 Nov 1997, Phillip Vandry wrote:
>
>> We have a customer using Link-Comp-MS-Stac instead of the usual Stac
>> compression because it seems more compatible with the NT machine they
>> have at the other end.
>
> If I remember properly, MS-Stac is only Win95 compatible. NT uses
>Stac compression only.
I don't think they use STAC at all on NT. The protocol is not CCP either.
I suspect both the protocol they use and the compression method are
MS proprietary....until NT5.0 (rumor has it).
>> Ascend Max-HP T1/PRI S/N: 6122652 Software +5.0Ap13+
>
> There was a problem in anything before 5.0Ap16, I had to deal with
>a customer with this kind of setup, he would connect fine, but after 5-10
>mins no data would go thru. I started reading the Patch Release notes and
>found this:
>----
>TR 2023 MAX started sending compressed data to an NT workstation even
> though compression was not negotiated.
>
> This fix introduced in: 5.0Ap16
>
> On connections to NT workstations after running for 1 to 5 minutes,
> the MAX sometimes started to send compressed data even though
> compression was not negotiated.
>----
Aha, yes I remember this one too...didn't effect everyone either - me for
example!
> After upgrading the customer was doing much better, but in your
>case, since this is ISDN, you might not want to do this because of the
>HDLC bug, you might want to try to disable compression at both ends, it
>might slow down performance, but its will be more reliable.
HDLC bug was fixed in 5.0Ap33...
>> Anyone also have some nightmares with this type of compression?
>
> I had plenty... if the majority of your customers in Win95 users,
>do not disable compression, since without compression a win95 login will
>take 30-45 seconds.
Why ? I was able to connect in much less time - I disabled the compression
option in WIN95 DUN - relying instead on modem compression....
Kevin
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