Re: TI-H: Networking

To: <ti-hardware@lists.ticalc.org>
Subject: Re: TI-H: Networking
From: "Gabe" <gabeman@earthling.net>
Date: Mon, 28 Sep 1998 19:07:51 -0400
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


That's kinda what we did at BerkshireNet to provide better 56k access...you
hook the pm3 up to ISDN lines instead of analog lines. Now we have the pm3s
in a NAP so it's trunked all funny and I have no idea how they do it
now...it's still digital lines going into the pm3 though.

-Gabe
-----Original Message-----
From: David Knaack <dknaack@hotmail.com>
To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
Date: Monday, September 28, 1998 1:07 PM
Subject: Re: TI-H: Networking


>
>>From: Grant Stockly <gussie@alaska.net>
>>>SHIVANJJS@aol.com (SHIVANJJS@aol.com) wrote:
>>>
>>>>i thought it was possible, don't large companys alow their employees
>to dial
>>>>up to their networks with modems to connect to company resources
>>>
>>>Yes, they do.  But they have digital lines that can support many
>>>connections through the same phone number.  It works like how you dial
>>>into an ISP.
>
>Not always, you can do the same thing with standard analog lines.
>
>>its a phone switching station.  Any house can have 50 phones on the
>same
>>line.
>
>if the owner can pay for it. :)
>
>>Digital lines go into it (I think about 68) and you get analogue phone
>>lines on the other side.
>
>Around here (texas) its called DigiLine, a form of ISDN PRI, 23
>digital bearer (B) channels, plus two signaling (D) channels.
>You can run it directly into a PM3 with up to 48 digital "modems"
>and bypass the final D->A conversion (helps to reach that magical
>56k line speed).
>
>>Usually you have analogue signals installed to your house, your line
>goes
>>to the phone utility, then your call is translated to digital signals,
>>routed, then changed back into analogue.
>
>Yep.  Usually the analog line from your house is routed to a
>substation with a few miles of your house, where it may or may
>not be converted to digital before being placed on a trunk.
>Most calls go through at least 4 A<->D conversions before reaching
>their destinations.  Many go through as many as 12.  The more
>A-D conversions a call goes through, the less likely it is that
>you will be able to reach high connection rates (56k is not
>possable where I live, too many conversions, best is around 34k).
>
>DK
>
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