LinuxSA Mailing list archives

  From: Daryl Tester <dt@picknowl.com.au>
  To  : Mark Newton <newton@atdot.dotat.org>
  Date: Sun, 26 Nov 2000 14:16:44 +1030

Re: ADSL Enabled Exchange Areas: Updated 20/11/2000

Mark Newton wrote:

> If you buy an ISDN card for your Linux box, you can place 64k calls through
> the NT1 interface which are tagged as "voice" calls (i.e.: 18c).  This
> effectively gives you a flat rate 36c 128kbps call to ISPs which support it.

I'm curious about this.  I was under the impression that the way
access servers differentiate between "data" and "voice" calls over
ISDN (and hence the decision to route to a modem or bypass the modem
straight to the PPP controller) was on the basis of that flag (bearer
capability?  Been a while since I mucked with ISDN too).  How does
this work then?  <Daryl prepares for his reality to be skewed yet
again>

> Yup - You just need to fool Telstra into thinking you're making voice
> calls so they won't extort $1/hour out of you.

Rather ironic, as they're both 64K point to point connections (plus,
with a data call, you're not using codecs at the far end to attach
to the PSTN network - you'd think it'd be cheaper. :-).


-- 
Regards,
  Daryl Tester,  Software Wrangler and Bit Herder, IOCANE Pty. Ltd.

"Who knows what men lurk in the heart of eval?"

-- 
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