TELECOM Digest Fri, 30 Sep 94 15:19:00 CDT Volume 14 : Issue 382 Inside This Issue: Editor: Patrick A. Townson T1<->23 or 24 BRI Equipment? (Bob Ames) Switch to Sprint Check/ Must Keep Them 160 Days (D. Castillo) EDI Billing (Rajiv Gupta) What Is # Called? (Wes Leatherock) MF Digit Grabber Wanted (Paul Cook) RI Installs Speed-Bumps For the Information Superhighway (Michael Deignan) UDI vs RDI in ISDN (psyche@metronet.com) Internet en Mexico (Robert L. McMillin) Revenue Sharing Between Operators in a Network (Sharad Ketan) Help CCITT 16kb/s LD-CELP G728 (Ya-di Lin) UC Berkeley Short Courses on Broadband Communications (Harvey Stern) Call For Papers: Malaysian Communications Conference (Mazlan Abbas) Need Amp to Boost DTMF Strength (htcink@teleport.com) Zmodem for Sparc, no XWindows (Ed Martini) Help Needed With Meridian 9216 (Florence M. Hurley) TELECOM Digest is an electronic journal devoted mostly but not exclusively to telecommunications topics. It is circulated anywhere there is email, in addition to various telecom forums on a variety of public service systems and networks including Compuserve and America On Line. It is also gatewayed to Usenet where it appears as the moderated newsgroup 'comp.dcom.telecom'. Subscriptions are available at no charge to qualified organizations and individual readers. Write and tell us how you qualify: * telecom-request@eecs.nwu.edu * The Digest is edited, published and compilation-copyrighted by Patrick Townson of Skokie, Illinois USA. You can reach us by postal mail, fax or phone at: 9457-D Niles Center Road Skokie, IL USA 60076 Phone: 708-329-0571 Fax: 708-329-0572 ** Article submission address only: telecom@eecs.nwu.edu ** Our archives are located at lcs.mit.edu and are available by using anonymous ftp. The archives can also be accessed using our email information service. For a copy of a helpful file explaining how to use the information service, just ask. ********************************************************************** * * TELECOM Digest is partially funded by a grant from the * * International Telecommunication Union (ITU) in Geneva, Switzerland * * under the aegis of its Telecom Information Exchange Services (TIES) * * project. Views expressed herein should not be construed as represent-* * ing views of the ITU. * ********************************************************************** * Additionally, the Digest is funded by gifts from generous readers such as yourself who provide funding in amounts deemed appropriate. Your help is important and appreciated. All opinions expressed herein are deemed to be those of the author. Any organizations listed are for identification purposes only and messages should not be considered any official expression by the organization. ---------------------------------------------------------------------- From: bob@ccnet.com (Bob Ames) Subject: T1<->23 or 24 BRI Equipment? Date: 30 Sep 1994 10:37:39 -0700 Organization: Creative Computer Solutions What is available to connect two remote offices via T1? Ideally, I'd like to use a T1 on each end and provide: *) Intercom service, *) TCP/IP traffic (Ethernet), *) (One/Several?) ISDN S/T or U lines. I'd like to be able to use ISDN phones on one end and on the other end connect to the Intercom system or to the LD Company via POTS or ISDN. Or to use, say, a Waverunner on one side and get thru the T1 to the main office, and then routed into the Ethernet on the other side. *) Anything else ISDN provides, like FAX. Do I need a PBX for all of this? Certainly some kind of switch-like routing seems necessary. Perhaps just a device which converts T1 into 24 ISDN B channels, and looks like an ISDN switch and provides, say, some S/T jacks. How much traffic can fit on an S/T? For example, can I put all 24 B channels on the S/T bus concurrently without degradation or failure? (I doubt it) Bob Ames UNIX & Telecom Administrator Creative Computer Solutions bob@ccnet.com <
Quoting Patrick Hoepfner hoepfner@haiti.gsfc.nasa.gov <=- PH> In article <779663044snz@bigbear.demon.co.uk>, PH> Susan@bigbear.demon.co.uk wrote: > In article > Craig.Williamson@ColumbiaSC.NCR.COM "Craig Williamson" writes: > > >Rattlesnake Stu (whitmore@tahoma.cwu.edu) wrote: > > >: -] >The airlines call it a "Cross of Lorraine". I know not why. > > >What's wrong with octothorpe? > > Well that works except that many people would look at you and say > > "Huh?" I would think that you could call it the number sign since it > > used for that also. PH> I agree. But another problem is that takes to long to say. When PH> calling out a Un*x regular expression how many times do you hear people PH> say "bang" rather than "Exclamation Point". I think the same goes for PH> "octothorpe" or "Cross of Lorraine" versus something like "pound". And PH> since Un*x permeates the net (for better or worse) it is in more common PH> usage that other "national" languages here. And besides, "octothorpe" PH> doesn't even show up in my dictionary. How many people are going to PH> know what it is? > I always call '#' Hash. Isn't that what it is? While those reading this newsgroup undoubtedly are very Unix literate, etc., much of the world is not. Every system I have ever called with a voice response unit, such as those used to route calls to departments or extensions, banks' systems that allow you to get your balance, lists of transactions, etc., and various other functions, always call it the pound sign. I am pretty well resigned to calling it the pound sign because, after all, I rarely have occasion to use any word to describe it on the computer (I simply hit the key or read the symbol), but I often have occasion to use voice response units. ... [text deleted] ... PH> .... But PH> whenever I see the * symbol I think of the mark left by a bug on a PH> car's windshield! Once it gets in your mind it is kind of hard to PH> forget it. That symbol is always called "star" in voice response units I have listened to. As far as the exclamation point goes, it does not occur on voice response units because there is no key for it on a touch tone telephone, so the only time it has to be called anything is when you are talking to another computer user. So "bang" is as good as anything there. ("Bang" is not limited to Unix users; MS-DOS users call it that, too.) (But if you're talking to a writer, editor, printer, typesetter, etc., you'd better call it an exclamation point. They don't understand "bang".) Wes Leatherock ------------------------------ Date: Fri, 30 Sep 94 12:25:00 EST From: Proctor & Associates <0003991080@mcimail.com> Subject: MF Digit Grabber Wanted I'm looking for a hand held MF Digit Grabber, a device that can display MF (not DTMF) digits monitored on a trunk. Can anyone point me to a manufacturer? Paul Cook 206-881-7000 Proctor & Associates MCI Mail 399-1080 15050 NE 36th St. fax: 206-885-3282 Redmond, WA 98052-5378 3991080@mcimail.com ------------------------------ From: md@pstc3.pstc.brown.edu (Michael P. Deignan) Subject: RI Installs Speed-Bumps For the Information Superhighway Date: 30 Sep 1994 16:28:16 GMT Organization: Population Studies & Training Center Here's the latest from our fine RI legislators: General Laws Pertaining to Telecommunication Licensing RIGL 5-69 Withstanding the exceptions contained in section 5-69-7 of the general laws of the state of RI -- only licensed telelcommunications contractors, licensed telecommunications system technicians, and licensed telecommunications system installers shall engage in, or design, install, alter, service, or test telecommunication systems in the state of RI. Categories requiring licensure are as follows: Data communications Telephony Video Communications Sound A "grandfather period" is in effect from July 12, 1994 until January 12, 1995, after that date all applicants for licensing must pass a written examination. I guess you have to be licensed to sell modems in computer stores now. MD The best way for Bill Clinton to keep his legal fees down is to keep his pants zipped up. ------------------------------ Date: Thu, 29 Sep 1994 23:00:26 -0500 From: perpetual psycheness Subject: UDI vs RDI in ISDN Organization: Texas Metronet, Internet for the Individual 214-705- 2901 (info) In the world of ISDN, what exactly does UDI and RDI mean? And when would a person know which one to use? (e.g. you try making a UDI call and then realize that it doesn't work, so then you try RDI? What kind of indications does the network use to determine what to do?) I think that UDI is supposed to be a 64kbps clear channel xmission (and I think you can have an RDI call over a trunk conditioned for UDI). And I think that RDI means that the data is restricted in the sense that you can't have some number of contiguous 0's, which effectively reduces the maximum bit rate to 56kbps, right? But then, could you try sending data at 64kbps for an RDI call or is one of the bits for each channel used to keep sync (I'm assuming this is over T1 type trunks for RDI; I guess E1 type trunks don't have this problem and are 64kbps clear channel trunks by nature?). But, 64kbps or 56kbps doesn't necessarily mean UDI and RDI, respectively, does it? And how does rate adaption come into the picture? Is it possible to have 9600bps data stream rate adapted up to 56kbps for RDI? or up to 64kbps for UDI? Is V.120 or V.110 common in the U.S.? What is commonly used overseas? What are the advantages of V.120 over V.110 or are there not any? A lot of questions... ;) Thanks for any information you can provide.... ------------------------------ Date: Fri, 30 Sep 94 09:31 PDT From: rlm@helen.surfcty.com (Robert L. McMillin) Subject: Internet en Mexico Perhaps of some interest to the readers of this forum. I've heard of a few people wanting Internet access across the border. Here's one provider. ------- Start of forwarded message ------- From: marior@nic.cerf.net (Lic. Silvia V. Vargas Gutierrez) Newsgroups: la.forsale Subject: INTERNET EN MEXICO Date: 29 Sep 1994 15:13:32 PST Organization: CERFnet Dial n' CERF Customer Solo una breve nota para notificar a todo el m?_L2:?Djw|College,DGi'sDavidIntrod@ucing  TaskView for WindowsKeep track ofMeterSystem+PUs?@Weaver1@andappearbuttoncompdesktopdisplayediconinemationtwthewindowwithyour/&;)z4^_]U|CONTEXTD|CTXOMAP 4|FONT3|KWBTREEY4|KWDATA4|KWMAPH4|Phrases|SYSTEM"|TOPIC"|TTLBTREE<|bm06|bm1|bm10D|bm11|bm12|bm137|bm14|bm15|bm16* |bm2|bm3( |bm4i |bm5 |bm6l|bm7|bm8X|bm9^_]UWV~vW( @PV tFPWvV ƋV^_]U,WVF>*ua u ++FV$0&<&>N Nt+FFFVFVFVFVt^&&College,DGi'sDavidIntroducing DGi's TaskView for WindowsKeep track ofMeterSystemTaskViewUsingWeaverWindowsandappearbuttoncompdesktopdisplayediconinformationtaskthewindowwithyouron information task the window with your 7 t^&G& tFV&&9Wsw&9wvvFP66WFV u-s%~u ~s^&G& t<+FҹV&&;Wr"w&;vvv^&&w&7JF~sf*VJ3V1V3Fv*3‰FF^FsF&F^FsF&n^*FN~v~tpglP    P "# A n %P(2": 0 Pv0 ʦ?Qcu);M_q%7I[m!3EWi{c0 0 f#m5.GYtk}l?D!%!(%f !% fj $E$#@/@HK0R AG@#P% 0pP e#@@Qcn`0;1#0A@q?b#[ #G~p!a#!12GCqAQ`Aq`jQa@@Qsb!kp;#.T`?cudk-" 1 )?(@(X~!%D$%0'%E4|4w _)J9 / I?A8lP=1 6 d  `    `"25 Cx 7+IP(A 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0FQ0 >  ` ` /cuA8lP=1 6 d  `    `"25 Cx 7+IP(A 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0FQ0 >  ` ` /cuA8lP=1 6 d  `    `"25 Cx 7+IP(A 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0FQ0 >  ` ` /cuA8lP=1 6 d  `    `"25 Cx 7+IP(A 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0FQ0 >  ` ` /culP C8  !H  P @0}=)'!0@ H p$6HZl~ 2DVhz .@Rdv*Pbt(:L^WC$TT$$P0BTfx}!+=OasqA =Oa9K]$P?Qc\\B`;M_`.:@QJU#`$p@@s`}fD$}pz4 A4pQpUzd``.Lyp[6 P`6hpPspwC# CC_dBeW!+Haӈ][tr^hG Fvia~TB^[~`s t‰Ubj]Ġeo z[9p+EfDf`fK(I[\!3EWi Zwyt sxlyZhy@`?pQ ߧYX_q̘")";gt@ gyr%lCasnkaZl~$E{~9]oiϴZ2DVhz'9K]o-9 A@@ #+'mI7zy 48Y vmlP#>   i  `    A w %P(- Ao 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{cؤ0 0 &#?0T @Oo@pk_-$$@$T u0 PQ@D4O 5vmlP X   o  `    A %P(2 :x 0 P;0 ʦ?Qcu);M_q%7I[m!3EWi{c0 0 & . / 7PN0L@Z0@ P?Sw-$$@$T @P@P4[5vmlP#>   i  `    A w %P(- Ao 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{cؤ0 0 &#?0T @Oo@pk_-$$@$T u0 PQ@D4O 5vmlP#>   i  `    A w %P(- Ao 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{cؤ0 0 &#?0T @Oo@pk_-$$@$T u0 PQ@D4O 5QHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_kQHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_kQHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_kQHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_kQHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_kQHlP11 V d  `    `"25 Cx 7+IP(V 5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0F V 0 @ P`g$ #;_klP~ vR    P 6 `"25 Cx B+IP(V5 0 P0 ʦ?Qcu);M_q%7I[m!3EWi{c0FQ0 (7I77o!e7/A70 70 @I777ooo7*ߐ2O!0 2gWג0787@l3-!Copyright 1993 David E. 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