Path: utzoo!attcan!uunet!aplcen!uakari.primate.wisc.edu!uwm.edu!wuarchive!texbell!vector!telecom-gateway From: cbmvax!cs.AthabascaU.CA!derrick@uunet.uu.net (Derrick Rowlandson) Newsgroups: comp.dcom.telecom Subject: Using a DS0 For Data Message-ID: Date: 20 Nov 89 18:56:13 GMT Sender: news@vector.Dallas.TX.US Organization: Athabasca University Lines: 16 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 525, message 11 of 11 Excuse the ignorance, but I am merely fumbling my way thru this stuff. My understanding of T1, and it's associatted DS0's, is that a 56K channel will carry a 56Kbit stream of traffic in *one* direction only. Most communications devices that may use, say HDLC, as a Link access protocol expect a full-duplex channel don't they? By this line of thinking, we would need two DS0's to carry a full-duplex 56K connection (example remote ethernet bridges). So what is the scoop? Are 2 DS0's needed, or do most WAN devices use a single DS0 in a half-duplex manner (if so can it still be HDLC)? Would someone be as kind to point out where I am going wrong here. Thanks, Derrick Rowlandson - Computing Services - Athabasca University