Re: (PM) 256K via 2 ISDN BRI

James Sneeringer (jvs@ocslink.com)
Mon, 23 Nov 1998 23:30:01 -0600 (CST)

On Mon, 23 Nov 1998, T. Berg wrote:
| It's not even possible in theory, cuz it's the TA that does the bonding
| not NT, you couldn't possibly do bonding of two separate ISDN lines with
| two separate TAs.

Are you certain? NT4 supports MP natively. Of course, I've never heard
of bundling two MP connections in another MP connection, but I don't see
why it wouldn't work. You'd just have two layers of encapsulation, which
will add some overhead. NT wouldn't have a fine-grain control over each
channel, either, but it would be able to control whether a TA tries to
connect at all.

Eicon makes a quad-BRI ISA card that is supported under NT. Whoever was
looking for an ISDN solution involving more than 128k might find it
useful: http://www.eicon.com/quad/default.htm

| However, in theory you should be able to do Multi-Line Load Balancing
| with two separate TAs but that would merely be two 128k channels, not
| one 256k channel.

ISDN itself is merely a collection of 56k or 64k channels. The "128k"
moniker is misleading, it's really just 2x64k. Latency is the difference.

| And I've yet to even see Multi-Line Load Balancing work correctly with
| analog modems with NT.

I think you're confused. NT doesn't do MLLB, it does MP. MLLB is
proprietary to Livingston, and is only available on platforms where
someone was bored enough to implement it (Linux, FreeBSD, etc.).

By all accounts on this list, NT does MP rather well with analog modems
(compared to it's DOS-based siblings, anyway).

-James

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