> -----Original Message-----
> From: owner-portmaster-users@livingston.com
> [mailto:owner-portmaster-users@livingston.com]On Behalf Of Patrick
> Kormann
> Sent: Thursday, March 25, 1999 10:06
> To: 'portmaster-users@livingston.com'
> Subject: AW: (PM) pm3 disconnects
>
>
> Hi!
>
> Another question going into this direction:
> Is nobody else experiencing sever problems with ISDN?
> For example, we can't get USR Sportster ISDN TAs to get more than
> about 3 K
> at all. Zyxel modems don't work correctly with v.120 or X75, PPP
> works, but
> nobody uses it when not specially told so.
ISDN PPP gives better performance than V.120, this is because V.120 adds a
lot of overhead because V.120 is Async, and ISDN is sync.
Doing Async over a sync line is not an easy task. You basically have to send
a whole sync frame for each async character.
> Out problem is, that many surfers get slow speeds like this and don't ever
> ask us wether you could do something against it because they
> think 'ISDN is
> ISDN so the provider just has to be slow'.
>
>
> PS: ACHTUNG!! Neue Einheitsnummer 0840 840 850 !!
> !! Gültig für die ganze Schweiz !!
>
> Mit freundlichen Grüssen
>
> Patrick Kormann
> DataComm (Schweiz) AG
> Projektleiter Technik
>
> --
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