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- Path: news.internetMCI.com!sackman!Jim_Sackman
- From: Jim_Sackman@usa.racal.com (Jim Sackman)
- Newsgroups: comp.dcom.servers,comp.dcom.telecom.tech,comp.dcom.frame-relay,comp.dcom.modems
- Subject: Re: Functions Of CSU/DSU On Digital Lines?
- Date: Mon, 15 Jan 1996 10:11:57
- Organization: Racal-Datacom, Inc.
- Message-ID: <Jim_Sackman.19.000A3358@usa.racal.com>
- References: <westesDL7IAM.28w@netcom.com>
- NNTP-Posting-Host: rdgw.racal.com
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-
- In article <westesDL7IAM.28w@netcom.com> westes@netcom.com (Will Estes) writes:
- >Newsgroups: comp.dcom.servers,comp.dcom.telecom.tech,comp.dcom.frame-relay,comp.dcom.modems
- >Path: news.internetMCI.com!newsfeed.internetmci.com!in2.uu.net!hodes.com!netcomsv!uu4news.netcom.com!netcomsv!uu3news.netcom.com!ix.netcom.com!netcom.com!westes
- >From: westes@netcom.com (Will Estes)
- >Subject: Functions Of CSU/DSU On Digital Lines?
- >Message-ID: <westesDL7IAM.28w@netcom.com>
- >Reply-To: westes@usc.com
- >Organization: U.S. Computer
- >X-Newsreader: TIN [version 1.2 PL1]
- >Date: Mon, 15 Jan 1996 05:08:46 GMT
- >Lines: 12
- >Sender: westes@netcom15.netcom.com
- >Xref: news.internetMCI.com comp.dcom.servers:3478 comp.dcom.telecom.tech:21871 comp.dcom.frame-relay:4549 comp.dcom.modems:130917
-
-
- >Can someone explain the basic functions performed by a CSU/DSU, and would
- >these functions have any place on a digital phone line?
-
- A CSU and a DSU used to be different things and perform those functions today
- on Digital Lines. A CSU terminates the Network Interface into a local
- interface. A DSU converts a local interface into something that can be used
- by gear on the site. If one uses the ISDN model, a CSU takes on the roll of
- an NT1 (terminating the U interface point and presenting an S/T interface
- point). A DSU does the adaption funtion from the R interface into the S/T
- interface. These functions can be placed in the same device and often are in
- the US.
-
- >In the next few years, phone companies will be wiring fiber optic connections
- >directly to home and business. Will a CSU/DSU have a place in such an
- >environment?
-
- I suspect that there will be a device that does what a CSU/DSU does, however
- it may be called something else.
-
- >--
- >Will Estes U.S. Computer
- >Internet: westes@usc.com POB 3150
- > Saratoga, CA 95070
- > FAX: 408-446-1013
-
- Jim Sackman
- Racal-Datacom
- Jim_Sackman@usa.racal.com
-