Date: Sun, 24 Jan 1999 09:56:47 -0800 (PST) From: Archie Cobbs <archie@whistle.com> To: stefhe@gmx.net (Stefan Herrmann) Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: I4B support for US ISDN? Message-ID: <199901241756.JAA28209@bubba.whistle.com> In-Reply-To: <36AB119D.553C5A99@gmx.net> from Stefan Herrmann at "Jan 24, 99 01:27:09 pm"
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Stefan Herrmann writes: > > On the other hand, from Layer 3 point of view it shouldn't make > > any difference whether its S or U interface. > > What does S and U interface meen and what is the difference ? It's just some typical ITU language. 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 S interface. The difference between the two is that only one device can connect to a U interface, whereas multiple devices (up to 8) can connect to an S interface. So the U is like the ISDN "WAN" interface, while the S (which is a bus) is like the "LAN" interface. -Archie ___________________________________________________________________________ Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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