Date: Sun, 24 Jan 1999 20:21:46 +0100 (CET) From: Achim Patzner <ap@bnc.net> To: archie@whistle.com (Archie Cobbs) Cc: stefhe@gmx.net, freebsd-isdn@FreeBSD.ORG Subject: Re: I4B support for US ISDN? Message-ID: <199901241921.UAA24044@gemini.bnc.net> In-Reply-To: <199901241756.JAA28209@bubba.whistle.com> from Archie Cobbs at "Jan 24, 1999 9:56:47 am"
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> The line that comes to your house ends in a U interface. If you stick an > NT1 on it, then that converts the U into an T reference point which is the connection between NT1 and NT2. The NT2's other reference point is the > S interface. The difference between the > two is that only one device can connect to a U interface, whereas > multiple ISDN Terminal Equipment 1 (TE1) > devices (up to 8) can connect to an S interface if it is provisioned for that. There is a second type of S bus configured for permanent activation intended for telephony TAs. And behind this lies the real of the R reference point which connects non-digital devices (called TE2) via Terminal Adapters (TA) to the network. And now someone might tell me why the CCITT needs such a brain damaged vocabulary to describe the simple facts of life. Besides... no German ever saw an NT1 itself; ...T. is always terminating its lines using an S reference point. Noses. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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