Path: utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!metro!wolfen!cs.uow.edu.au!david
From: david@cs.uow.edu.au (David E A Wilson)
Newsgroups: comp.dcom.modems
Subject: Re: Do US-made modems work in the UK?
Message-ID: <1990Oct25.042752.28401@cs.uow.edu.au>
Date: 25 Oct 90 04:27:52 GMT
References: <1990Oct16.133001.271@computing-maths.cardiff.ac.uk> <2174@hayes.uucp> <2489@root44.co.uk> <2263@hayes.uucp>
Organization: Dept of Computer Science, Wollongong University
Lines: 17

tnixon@hayes.uucp (Toby Nixon) writes:
>Fine, but that's not what he asked.  He DID ask whether DTMF was the 
>same everywhere, and that's the question I answered.

Well, not quite according to the manual for a Bit Blitzer 12E. In it it states:

	This modem has a default Tone spacing and duration of 70ms
	which may not meet the requirements of your PABX. It can be
	modified via S register 11.

	Note: To Tone Dial a Telecom Australia Public Telephone Exchange
	you should change the duration and spacing to 80ms (ATS11=80<CR>).

I am quite prepared to agree that the tone pair frequencies are standardised
but it appears that the minimum duration allowed varies.
-- 
David Wilson	Dept Comp Sci, Uni of Wollongong	david@cs.uow.edu.au