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Approved: becool Received: (from root@localhost) by stone.ucs.indiana.edu (8.6.10/8.7.Alpha.5) i d MAA10924 for cell-relay-digest-send; Mon, 10 Apr 1995 12:39:55 -0500 Date: Mon, 10 Apr 1995 12:39:55 -0500 Message-Id: <199504101739.MAA10924@stone.ucs.indiana.edu> From: owner-cell-relay-digest To: cell-relay-digest@stone.ucs.indiana.edu Subject: Cell Relay Digest V2 #18 Reply-To: comp.dcom.cell-relay@indiana.edu Errors-To: owner-cell-relay-digest Precedence: bulk X-Info1: submissions to comp.dcom.cell-relay@indiana.edu X-Info2: [Un]Subscribe requests to cell-relay-request@indiana.edu X-Info3: example- unsubscribe cell-relay-digest somebody@somewhere.com X-Info4: http://cell-relay.indiana.edu/cell-relay/archives/archives.index.html Cell Relay Digest Monday, 10 April 1995 Volume 02 : Number 018 Re: Broadcast Video over ATM Re: Can I connect PBX with ATM? Re: Where to buy an ATM shaper? Re: Paper on Transmitting ATM Cells on Satellite Links Re: Data Source Models Frame Relay over DS3? Re: Where to buy an ATM shaper? Voice over ATM - if not today, when? Re: Voice over ATM - if not today, when? Re: Where to buy an ATM shaper? WWW site for ATM chips Switch with 3.0&3.1 handling?? a question about sscop Re: Broadcast Video over ATM What is the ABT? To: What is the ABT? BitFaxPro Broadcasting Problem Re: ATM Adaptors for HP 9000 Series Machines GTE IntraLATA toll rates Re: Need info : advantages of ATM backbone on Ethernet backbone Re: Can I connect PBX with ATM? ATM Presentation by David Beering at Purdue (update) Re: Bandwidth or Latency? VPI/VCI and Type of traffic? Re: ATM Presentation by David Beering at Purdue (update) Re: Voice over ATM - if not today, when? RJ-11 OPTION FOR CELL PHONE Re: VPI/VCI and Type of traffic? Antw: Paper on Transmitting Re: ATM Adaptors for HP 9000 Series Machines Re: ATM Adaptors for HP 9000 Series Machines 155 Mbits/s optical Rx/Tx modules What's the ABT in RM cell format of ITU I.371? Re: HELP: H. T. Kung ATM Adaptors for PCI ? Newbridge and Cisco Interoperability Re: RJ-11 OPTION FOR CELL PHONE ATM for PBX question ---------------------------------------------------------------------- From: kjh0@gte.com Date: Fri, 7 Apr 1995 09:15:08 -0500, Fri, 07 Apr 95 09:13:55 PDT Subject: Re: Broadcast Video over ATM In article <12950405145321/0006593922DC6EM@MCIMAIL.COM>, <0006593922@mcimail.com> writes: > > Hello, > > I've seen a lot of references to video over ATM, I am specifically interested > in any trials regarding broadcast quality, NTSC video over ATM. The standard > transmission speeds for broadcast video until recently have been about 40Mbs > over a DS-3. Lately with MPEG 2 and some proprietary methods much lower bit > rates are possible. I have read about tons of trials in the trade mags, I would > like to hear about some first hand. What bit rate, what compression method and > most importantly, how does it look? Will it hold up under the stringent eye > of a broadcast video engineer? > > This may be a subjective question, but I have found video engineers have > the best critical eye for this type of application, and they don't hesitate > to tell you what is wrong with the picture. > > > Thanx > KDistel I havnt been involved in any trials put I have had some first hand expierence with ATM video codecs. MPEG2 hardware for ATM is under development by Divicom, AT&T and others and its very, very expensive. However motion JPEG seems to have caught on for video conferencing over ATM. At the Interop Trade Show in Vegas last week 5 vendors were showing ATM JPEG video codecs: -AT&T, EMMI -STS Tech., MMX -Newbridge, JPEG video card for the 36150 ATM switch -General Data Com, JPEG video card for ATM switch -Fujitsu, JPEG card for ATM service mux. Both STS Tech and Newbridge uses a LSI chip set (I believe AT&T uses the same chip set as well). These codecs offer full NTSC resolution and frame rate and the quality is quite good. Both of these codecs uses AAL1 (like, both vendors hardware predates the finalized standards). However the quality is not quite broadcast, if you have a trained eye you can see the compression artifacts (edges are not quite as sharp). If anyone is familiar with the current digital satilite services using MPEG then the quality is similar. At the higest quality settings these codecs run at 25 to 35 Mbps depending on video content (yes VBR on AAL1!). Another interesting way to do video over ATM is to use DS-3 circuit emulation and then utilize broadcast quality codecs for DS-3. This is currentlt in use on NCIH for some distance learning applications. DS-3 cir. emu. certainly uses AAL1 based on the lastest standards. Ken Head kjh0@gte.com ------------------------------ From: kjh0@gte.com Date: Fri, 7 Apr 1995 09:25:39 -0500, Fri, 07 Apr 95 09:44:53 PDT Subject: Re: Can I connect PBX with ATM? In article <NEWTNews.10406.797187117.pp000413@Patg1.Texas.net>, <atg1@texas.net> writes: > > This is one of the biggest weaknesses of ATM today, no PBX interfaces. > > > > > Can I connect PBX or PABX in an ATM Backbone? > > > > There is of course the DS-1 circuit emulation interface for a number of ATM switches. This allows a DS-1 from a PBX to another PBX to be carried via ATM. Ken Head kjh0@gte.com ------------------------------ From: kjh0@gte.com Date: Fri, 7 Apr 1995 09:36:13 -0500, Fri, 07 Apr 95 09:54:16 PDT Subject: Re: Where to buy an ATM shaper? In article <D6nrDo.K0v@sci.kun.nl>, <johnk@cs.kun.nl> writes: > Hi ATM folks, > > Does anybody know a company where I can get an ATM shaper? > If so please provide me with details or at least a pointer. > I'm already aware of ATecoM and CNET. I will summarise to the group. > > John Kroeze __ Both HP and Adtech have a ATM network emulator in development where absolute delay and CDV will be simulated, with some creative programing, these tests sets should be able to do smoothing/shaping. Ken head kjh0@gte.com ------------------------------ From: kschultz@eecg.toronto.edu (Ken Schultz) Date: Fri, 7 Apr 1995 09:44:59 -0500, 7 Apr 95 13:46:03 GMT Subject: Re: Paper on Transmitting ATM Cells on Satellite Links In article <3lutm2$hg0@ds2.acs.ucalgary.ca> njsexton@acs.ucalgary.ca (Naill Jas on Sexton) writes: >In the 'Scanning the Literature' section of the February 1995 issue of >IEEE Communications Magazine, one of the journal articles mentioned is: > > Study on Protocols to Accomodate ATM Cells in Satellite TDMA Links > Ohta, A. and Okada, K. > IEICE Transaction on Communications > Volume: E77-B/8 Aug. 1994 > >I requested a copy of this article through the interlibrary loan department >and after two weeks received a copy in Japanese (which wasn't really that >surprising). > >Does an english language version of this journal article exist? > >Thanks! >Niall. As far as I know, the "E" in E77-B indicates the English version of the journal. What the library sent you must have been from vol. 77-B. You should be able to get it in English. ...Ken ------------------------------ From: Andreas Grebe <Andreas.Grebe@fernuni-hagen.de> Date: Fri, 7 Apr 1995 10:15:04 -0500, Fri, 7 Apr 1995 17:15:32 MET Subject: Re: Data Source Models Christian Winkler wrote: > In literature you can find data source models, some based on > traffic measurements, some based on traffic theory. But in general the > model parameters are missing and thus the models are useless for our > simulations. > > Any idea where to look for appropriate data source models? > Or where to get traffic measurement data? Roya Ulrich at Erlangen University (IMMD VII) has developed the OSSCAR similator with various traffic generators. To my knowledge they are based on traffic measurements known from literature. You may contact her at at roya@informatik.uni-erlangen.de. Andreas ------------------------------ From: coastcom@netcom.com (COASTCOM) Date: Fri, 7 Apr 1995 11:56:25 -0500, Fri, 7 Apr 1995 16:39:31 GMT Subject: Frame Relay over DS3? A few weeks back, someone posted an article indicating that one of the Bell Companies was planning on offering frame relay via DS3. Has anyone heard anything more? Is there any work being done by the Frame Relay Forum to support frame relay services at rates higher than T1/E1? If this is correct, I think that high speed frame relay would have a major impact on the market acceptance of ATM. ------------------------------ From: kfrs@ctidata.com (kfrs@ctidata.com) Date: Fri, 7 Apr 1995 12:05:41 -0500, Fri, 7 Apr 1995 10:11:04 -0400 Subject: Re: Where to buy an ATM shaper? John: Contact FORE Systems at info@fore.com, they have more ATM adapters with more OS support than anyone. There is a european hq based in the uk and field sales offices in france, germany, and spain (???). We sell the products here in Canada and they're rock solid unlike others that I've been testing. Good Luck! Kevin =============================================================================== Kevin F. R. Suitor Tel. +1 (514) 683.6363 Ext. 15 Director FAX +1 (514) 683.7997 Internetworking Systems Email kfrs@ctidata.com CTI Datacom Inc. Distributors of: 2250, Place Transcanadienne FORE Systems Optical Data Systems Dorval, (Quebec) H9P 2X5 Xylan Corporation XEDIA Corporation CANADA LAN Access Corp. Western Datacom Co. ------------------------------ From: jstone@netcom.com (Jeffrey Stone) Date: Fri, 7 Apr 1995 14:14:49 -0500, Fri, 7 Apr 1995 18:50:11 GMT Subject: Voice over ATM - if not today, when? Based on comments seen in the trade press and probably even on this board, I believe that the standards that will enable voice traffice (e.g. as terminated by a PBX) to be carried over ATM concurrently with VBR data traffic are not yet completely defined. My questions: 1. Is the above statement true, if not, what is the situation? 2. What work remains in standards (or implementor agreements) before vendors can build ATM nets that support voice (interoperably)? 3. When might we see such standards becoming stable? Jeff Stone info/mation jstone@netcom.com - -- Jeffrey Stone info/mation jstone@netcom.com ------------------------------ From: matt@acti.com (Matt Noah) Date: Fri, 7 Apr 1995 15:59:30 -0500, Fri, 07 Apr 1995 21:04:21 GMT Subject: Re: Voice over ATM - if not today, when? jstone@netcom.com (Jeffrey Stone) wrote: >Based on comments seen in the trade press and probably even on this >board, I believe that the standards that will enable voice >traffice (e.g. as terminated by a PBX) to be carried over >ATM concurrently with VBR data traffic are not yet completely >defined. >My questions: > 1. Is the above statement true, if not, what is the situation? It is possible to do what you say. > 2. What work remains in standards (or implementor agreements) before > vendors can build ATM nets that support voice (interoperably)? We are just now working on these IAs in the Frame Relay Forum. Since the two are so similar, perhaps we should consider a joint Voice Over ATM/FR technical committee. > 3. When might we see such standards becoming stable? You will see proprietary voice over ATM many many months before there is standard voice over ATM - my opinion. >Jeff Stone >info/mation >jstone@netcom.com >-- >Jeffrey Stone info/mation jstone@netcom.com ------------------------------ From: srini@starfury.igt.com (Srini Seetharam) Date: Fri, 7 Apr 1995 16:48:52 -0500, 7 Apr 1995 21:48:31 GMT Subject: Re: Where to buy an ATM shaper? Integrated Telecom (IgT) has a User Parameter Control UPC chip. check out the http site at http://www.igt.com/ - -- srini ------------------------------ From: srini@starfury.igt.com (Srini Seetharam) Date: Fri, 7 Apr 1995 16:51:14 -0500, 7 Apr 1995 21:50:43 GMT Subject: WWW site for ATM chips IgT has a WWW site listing information on ATM chipsets and other high speed networking devices. - -- srini srini@igt.com ------------------------------ From: mchang@kaiwan009.kaiwan.com (Mark Chang) Date: Fri, 7 Apr 1995 18:23:14 -0500, 7 Apr 1995 15:59:29 -0700 Subject: Switch with 3.0&3.1 handling?? Are there switches that will handle Uni3.0 and 3.1 signalling on the fly and at the same time? If there are, how are they doing it. I don't see how a switch can tell what UNI is coming across. None of the messages have that (section 5 of UNI specs) Thanks in advance. Mark ,+------------------------------------------------------------------------+ +-------------------------------------------------------------------------+| | Mark C. K. Chang Faith Academy 85|| | Embedded Systems Software Engineer CSUF 91|+ | Creative Integrated Systems Inc. AACF Alumni|' | mchang@kaiwan.com, mark.chang@solar.org, http://www.kaiwan.com/~mchang |' +-------------------------------------------------------------------------+ ------------------------------ From: jrc@Eng.Sun.COM (Jerry Chen) Date: Fri, 7 Apr 1995 18:52:36 -0500, 7 Apr 1995 23:42:01 GMT Subject: a question about sscop In UNI 3.0, VT(PA) was set to STAT.N(PS) + 1. However, in UNI 3.1 (Q.2110 final draft), it is set to STAT.N(PS). Does anybody know why? Thanks in advance. Jerry ------------------------------ From: Robert Sarullo <rsarullo@crl.com> Date: Fri, 7 Apr 1995 19:41:59 -0500, Fri, 7 Apr 95 16:24:48 PDT Subject: Re: Broadcast Video over ATM >Ken Head writes: >MPEG2 hardware for ATM is under development by Divicom, AT&T and >others and its very, very expensive. General DataComm is also developing MPEG2. > >However motion JPEG seems to have caught on for video conferencing >over ATM. At the Interop Trade Show in Vegas last week 5 vendors >were showing ATM JPEG video codecs: > > -AT&T, EMMI > -STS Tech., MMX > -Newbridge, JPEG video card for the 36150 ATM switch > -General Data Com, JPEG video card for ATM switch > -Fujitsu, JPEG card for ATM service mux. > >Both STS Tech and Newbridge uses a LSI chip set (I believe >AT&T uses the same chip set as well). These codecs offer >full NTSC resolution and frame rate and the quality is quite >good. Both of these codecs uses AAL1 (like, both vendors hardware >predates the finalized standards). General DataComm's product uses Motion JPEG over AAL1 or AAL5. >However the quality is not quite >broadcast, if you have a trained eye you can see the compression >artifacts (edges are not quite as sharp). If anyone is familiar with >the current digital satilite services using MPEG then the quality >is similar. At the higest quality settings these codecs run at 25 to >35 Mbps depending on video content (yes VBR on AAL1!). Key point that's missing here is: if you are going to use VBR over AAL5, then the ATM switch must be able to provide for traffic management and policing. Of these v endors mentioned, General DataComm's APEX switch is the only platform which can do it. So, unless the switch can provide for traffic management, you are forced to use AAL1. This is why you have said "(yes VBR on AAL1!)" because you must not have stopp ed by the General DataComm booth! > >Another interesting way to do video over ATM is to use DS-3 >circuit emulation and then utilize broadcast quality codecs >for DS-3. This is currentlt in use on NCIH for some >distance learning applications. DS-3 cir. emu. certainly >uses AAL1 based on the lastest standards. > >Ken Head >kjh0@gte.com > - ----------------------------------------------------------------------------- -- Name: Robert Sarullo E-mail: rsarullo@mail.crl.com (Robert Sarullo) Disclaimer: this message represents my personal opinion only - ----------------------------------------------------------------------------- -- ------------------------------ From: dhkim@palgong.kyungpook.ac.kr (Dong-Ho Kim) Date: Sat, 8 Apr 1995 10:23:56 +0900 (KST) Subject: What is the ABT? Hi, All. What is ABT(ATM Block Transfer Bearer Service)? I think that FRP(Fast Reservation Protocol) is a kind of ABT. (ex. FRP/DT is the subset of ABT/DT) Let me know it. Thanks in advance. Dong-Ho Kim ------------------------------ From: dhkim@palgong.kyungpook.ac.kr (Dong-Ho Kim) Date: Sat, 8 Apr 1995 10:27:58 +0900 Subject: To: Hi, All. What is ABT(ATM Block Transfer Bearer Service)? I think that FRP(Fast Reservation Protocol) is a kind of ABT. (ex. FRP/DT is the subset of ABT/DT) Let me know it. Thanks in advance. Dong-Ho Kim ------------------------------ From: dhkim@palgong.kyungpook.ac.kr (Dong-Ho Kim) Date: Sat, 8 Apr 1995 10:52:58 +0900 (KST) Subject: What is the ABT? Hi, All. What is the ABT(ATM Block Transfer Bearer Service) in RM Cell Fromat? I think that FRP(Fast Reservation Protocol) is a kind of the ABT. (That is, FRP/DT is the subset of the ABT/DT) Let me know it. Thanks in advance. Dong-Ho Kim. - ------------------------------------- e-mail : dhkim@palgong.kyungpook.ac.kr ------------------------------ From: jedi@docnet.infolink.co.za (Igor) Date: Fri, 7 Apr 1995 22:13:19 -0500, 8 Apr 1995 06:58:07 GMT Subject: BitFaxPro Broadcasting Problem ------------------------------ From: jkay@isis.com (Jon Kay) Date: Fri, 7 Apr 1995 22:40:15 -0500, 8 Apr 1995 03:39:51 GMT Subject: Re: ATM Adaptors for HP 9000 Series Machines >>Vernon Schryver (vjs@calcite.rhyolite.com) boldly asserted: > Most of us still have applications that care more about throughput > than latency, and do not yet have many if any applications that care > about latency. This is a pretty astonishing claim. NFS is the #1 workstation network application, and it spends way more time on back-and-forth bounces than on the occasional pipelined, high-throughput, multi-biod reads/writes. In fact, if anything, I'd assert the opposite. When I was writing about how to achieve high throughputs, I always had a hard time dredging up REAL examples rather than scare stories. Yeah, there was that scare about video taking 24 megabytes/sec/stream, but a quite reasonable-quality 'vic' stream takes a small number of megabits, and uses such small packets that its packet processing characteristics have more in common with latency benchmarks than with throughput benchmarks. > Besides, it takes time to port and run benchmarks. Amen. But perhaps the one benchmark to run if time is scarce should be a latency benchmark. On the other side of the coin, those of you considering buying network hardware and software would probably see a larger correlation with observed performance of most applications if you asked to see latency numbers rather than throughput numbers (of course, best is both, with primary emphasis on latency, kind of like SPECint and SPECfp). Jon ------------------------------ From: maryholub@aol.com (MaryHolub) Date: Sat, 8 Apr 1995 05:22:48 -0500, 7 Apr 1995 22:05:10 -0400 Subject: GTE IntraLATA toll rates Could someone please tell me what GTE's IntraLATA toll rates are. Specific numbers would be great but high and low floors would also help. Thanks, Mary ------------------------------ From: guru@deltanet.com (Bill Schultz) Date: Sat, 8 Apr 1995 12:03:44 -0500, 8 Apr 1995 17:01:44 GMT Subject: Re: Need info : advantages of ATM backbone on Ethernet backbone In <fmo.74.000D45C4@info.fundp.ac.be>, fmo@info.fundp.ac.be (Frederic Mottiat) writes: >I would like to know what are the advantages / drawbacks of turning an >ethernet backbone into an ATM backbone, in terms of speed, ease of use, ...... |
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