Re: remote site access iSeries via dsl

["Jim Franz" <franz400@xxxxxxxxxxxx>]

Any recommends for a decent dsl router supporting vpn?
Or should it be separate from the dsl. Phone co wants to give
us a very cheap Netopia 4 port.
jim

----- Original Message ----- 
From: "Jones, John (US)" <John.Jones@xxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Tuesday, January 23, 2007 8:08 AM
Subject: RE: remote site access iSeries via dsl


> Back in the day, we used to put 30+ users plus a few line printers (text
> + barcode) on 19.2Kb leased lines.
>
>
> Formula:
> Bandwidth = ScreenSize * Screens/Minute * ConcurrentUsers
>
> ScreenSize: A 5250 screen maxes out at about 4KB.  That's actually
> download size; uploads IIRC only get the new field data + key stroke
> used (F-key, Enter, etc.) so the average upload is more likely to be
> under 1KB.  I'll use 4KB as a worst-case.
> Screens/Minute: Not sure; assuming 5 on average.
> ConcurrentUsers: 5
>
> Bandwidth = 4KB * 5 Screens/Minute * 5 = 100KB/minute
>
> Convert that to the bandwidth measurement units from your DSL provider:
>
> 100KB/minute * 1 minute/60 seconds * 8Kb/KB = 13.3 Kb/s
>
>
> You will probably have more to worry about from media streaming, P2P
> file sharing, & other inappropriate uses than the iSeries stuff.
>
> --
> John A. Jones, CISSP
> Americas Information Security Officer
> Jones Lang LaSalle, Inc.
> V: +1-630-455-2787 F: +1-312-601-1782
> john.jones@xxxxxxxxxx
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Scott Klement
> Sent: Tuesday, January 23, 2007 1:58 AM
> To: Midrange Systems Technical Discussion
> Subject: Re: remote site access iSeries via dsl
>
> Hi Jim,
>
> > How many users in a remote office can one reasonably support with a
> > business dsl circuit 3.0 mbps downstream and 384 kbps upstream?
> > Each pc using Client Access (telnet).
>
> Only telnet?  No file transfer?  No web?  No ODBC? No E-mail? Is that
> correct?
>
> You should be able to handle quite a lot of users in that case. I'd say
> 50 or so.
>
> That assumes that the 384 speed is the upload speed from the iSeries to
> the user.  If the 3.0 mbps is the upload speed, I'd say you can handle a
> lot more users.  200 users easily over a 3 megabit upload speed.
>
> Now, if the users will be doing anything that requires sustained network
> traffic (ODBC, file transfers, etc) then the numbers will come way down.
>
> But for 5 users, it should still be more than enough.
>
>
> --
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