Date: Thu, 14 Mar 1996 11:43:12 +0000 From: Aled Morris <aledm@routers.co.uk> To: Greg Lehey <lehey.pad@sni.de>, cmlambertus@ucdavis.edu (Chris Lambertus) Cc: hackers@freebsd.org (Hackers; FreeBSD), jkrause.padg@sni.de Subject: Re: Microsoft "Get ISDN"? Message-ID: <199603141251.MAA09029@deputy.pavilion.co.uk>
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At 09:06 14/03/96 MET, Greg Lehey wrote:
>(S0 is a German term for BRI)
Being pedantic, S0 is the name of the "reference point" where you
interface to the ISDN.
ISDN is delivered on a copper pair, ("U" interface) which is adapted
to a two pair "S" (or "S0") interface by an "NT1". In the US, the customer
is responsible for the NT1 (hence many ISDN devices boast "integrated
NT1") whereas in Europe, the telco provides the NT1.
Same with DSU/CSUs for regular leased lines I believe.
Aled
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