RE: remote site access iSeries via dsl

Cisco 827 for professional equipment
Linksys Garbage for SOHO equipment

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Franz
Sent: Tuesday, January 23, 2007 4:04 PM
To: Midrange Systems Technical Discussion
Subject: Re: remote site access iSeries via dsl

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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