TELECOM Digest Thu, 2 Jun 94 11:22:00 CDT Volume 14 : Issue 267 Inside This Issue: Editor: Patrick A. Townson FCC Fact Sheet on Future Changes in Telephone Numbering (Bob Keller) 2nd Radio Montreux (June 9-11) (Alfredo E. Cotroneo) NYNEX Bill Insert - Rate Changes (Jonathan Welch) Spread Spectrum Video (Charbel Tannous) ATT/MCI Numbering War (Rick Watson) 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 GEnie. 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. ---------------------------------------------------------------------- Date: Thu, 2 Jun 1994 11:40:10 EDT From: Bob Keller Subject: FCC Fact Sheet on Future Changes in Telephone Numbering nrcc4029.txt ==> from ftp.fcc.gov FEDERAL COMMUNICATIONS COMMISSION INDUSTRY ANALYSIS DIVISION FACT SHEET MAY 1994 Future Changes in Telephone Numbering Several important changes will affect the North American Numbering Plan during the next few years. These changes will require telephone companies to modify their network switches. They will also require some users to modify their customer premises equipment. The equipment affected includes payphones and privately owned switchboards (generically known as private branch exchanges or PBXs). This Fact Sheet has been prepared to answer the most frequently asked questions about upcoming changes in telephone numbers. It also provides sources of further information and assistance. Interchangeable Area Codes Currently, the second digit of an area code is always "0" or "1". All usable three-digit numbers in this format have been assigned as area codes. Beginning in 1995, new area codes will have numbers other than "0" or "1" as the second digit. As a result, area codes will have the same format as the central office codes that appear at the beginning of local telephone numbers -- hence, the term "interchangeable" codes. Three interchangeable area codes have been assigned for service during early 1995. These new area codes will be placed in service in Alabama (334), Washington State (360), and Arizona (520). Some parts of the telephone network -- including both telephone company switches and customer equipment -- were not designed to handle interchangeable codes. When a call to an interchangeable area code is attempted from such equipment, the call will not be routed correctly. Therefore, this equipment must be reprogrammed, modified, or replaced in order to handle the dialing of interchangeable area codes. New Dialing Procedures Dialing procedures have traditionally been determined by local telephone companies and state public utility commissions. Consequently, they are not uniform, especially for toll calls that originate and terminate within the same area code. Over a period of many years, three basic dialing procedures have evolved for toll calls that do not cross an area code boundary. In some states, such calls are made simply by dialing a seven-digit number. In other states, these calls are placed by dialing "1" as a toll indicator, followed by the seven-digit number. In still other states, toll calls within the same area code are placed by dialing "1" plus ten digits (the local area code plus the seven digit number). When interchangeable codes are activated in 1995, the prefix "1" will be used to indicate that the call is longer than seven digits. This means that the "1 plus 7" method of dialing toll calls within the same area code will no longer be feasible. Each state that used "1 plus 7" dialing has selected one of the other two dialing options. Some states have already completed the change and others are in the process of doing so. The use of "1" as an indicator of ten-digit calls means that, in most areas, systems cannot rely on a leading "1" as a toll indicator. PBXs or other switches that have been programmed to block toll calls based on the use of "1" as a toll indicator will need to be altered. Conversion to 101XXXX Access Codes Callers sometimes reach long distance carriers by dialing carrier access numbers in the format 10XXX (where "XXX" represents a carrier's three-digit identification code). AT&T's code is 288, MCI's is 222, etc. Thus, customers can reach AT&T by dialing 10288, reach MCI by dialing 10222, etc. Because almost all three-digit identification codes have been assigned, four-digit identification codes will be assigned in 1995. Carriers with four-digit identification codes will be reached by dialing 101XXXX. Under current law, new equipment manufactured for use by aggregators (PBXs or key systems used by hotels, motels, hospitals, universities, payphones, and others that provide telephones for "transient" users) must be capable of processing 10XXX access code dialing. Newly manufactured equipment should have the capability of processing 101XXXX dialing, but some payphones and other older equipment will not be able to complete calls to 101XXXX numbers. During a transition period, both 10XXX and 101XXXX access codes will be used. At the end of the transition period, all access codes will use the 101XXXX format. The transition period will provide owners of non-conforming equipment with time to modify, reprogram, or replace that equipment. However, users of such equipment will not be able to reach carriers with the new four-digit identification codes until modifications are made. The FCC has proposed a transition period of six years. Thus, users may have several years to make the necessary changes. The date when such changes will become mandatory has not yet been established. Longer International Telephone Numbers Under international agreements, international telephone numbers are now limited to 12 digits. Beginning in 1997, the maximum permissible length will be increased to 15 digits. Although there are no plans to increase the length of telephone numbers in the United States, Germany has announced its intention to lengthen its numbers. Several other countries are also likely to do so. When the length of international telephone numbers is increased, customer premises equipment will have to store and process the longer numbers. Where to Go for More Help For questions regarding specific customer premises equipment and what must be done to ensure readiness to process the new numbers, users should first consult the manufacturers or equipment suppliers. Additional information is also available from the following sources: *** The North American Numbering Plan is administered by Bell Communications Research. The administrator has prepared a report, Status of Numbering in the NANP Served Area, that provides more detail on each of the coming changes and includes the dialing plan in each state. The report is available without charge from: Claudette Keith North American Numbering Plan Administration Bell Communications Research Room 1E240 290 West Mt. Pleasant Avenue Livingston, New Jersey 07039-2798 201 740-6792 201 740-6860 (FAX) Questions on interchangeable area codes, dialing plans, and international telephone numbers can be addressed to: Garry Benoit North American Numbering Plan Administration Bell Communications Research Room 1B227 290 West Mt. Pleasant Avenue Livingston, New Jersey 07039-2798 201 740-4592 201 740-6860 (FAX) Questions on the expansion of carrier identification codes can be addressed to: Jim Deak North American Numbering Plan Administration Bell Communications Research Room 1B227 290 West Mt. Pleasant Avenue Livingston, New Jersey 07039-2798 201 740-4594 201 740-6860 (FAX) *** The vast amount of information necessary for routing calls throughout the telephone network is maintained by Bellcore's Traffic Routing Administration. The information is contained in large data bases and most can be reached through on-line computer access. Much of the information can also be purchased in a variety of formats (paper, tape, microfiche, and CD-ROM). A catalog describing the products available can be obtained from the Traffic Routing Administration Hotline at 201 740-7500. For more information, contact: Donald Baechler Traffic Routing Administration Bell Communications Research Room 1E235 290 W. Mt. Pleasant Ave Livingston, N.J. 07039-2798 201 740-7575 201 740-6999 (FAX) *** Local telephone companies and long distance carriers have been preparing for the coming changes. The United States Telephone Association has prepared several information bulletins that are available without charge. These publications can be obtained from, and questions about the telephone network can be addressed to: Dennis Byrne Executive Director Operations and Engineering United States Telephone Association Suite 600 1401 H Street N.W. Washington, D.C. 20005-2136 202 326-7296 202 326-7333 (FAX) *** The North American Telecommunications Association represents both suppliers and users of telecommunications equipment. They have prepared a publication called The North American Numbering Plan: A Guide to Preparing for the New Number Formats. This publication can be obtained for a charge of $25.00 by calling 800 538-6282, Ext. 260. Questions can be addressed to: Mary Bradshaw Director, Industry Relations North American Telecommunications Association Suite 550 2000 M Street N.W. Washington, D.C. 20036 202 296-9800, Ext. 210 202 296-4993 (FAX) *** All of the publications referred to above are available in the Public Reference Room operated by the Commission's Industry Analysis Division. Questions may be addressed to the Commission's staff at: Industry Analysis Division Federal Communications Commission 1250 23rd Street N.W. Washington, D.C. 20554 202 632-0745 202 632-1411 (FAX) -FCC- Bob Keller Robert J. Keller, P.C. Tel +1 301 229 5208 rjk@telcomlaw.com Federal Telecommunications Law Fax +1 301 229 6875 finger me for daily FCC info + see ftp.clark.net:/pub/rjk/ for other files ------------------------------ From: 100020.1013@CompuServe.COM (Alfredo E. Cotroneo) Subject: 2nd Radio Montreux (June 9-11) Date: 2 Jun 1994 09:51:15 -0500 Organization: UTexas Mail-to-News Gateway From Thursday June 9, 1994, till Saturday June 11 Montreux will host the 2nd Radio Montreux, with an interesting Symposium and Technical Exibition for those who are interested in Radio Broadcasting, especially in Europe. Montreux is one hour drive/train from Geneva, on the Lake of Geneva (Switzerland). There will be three parallel sessions during the three days, divided on topics related to Radio Station Management, Programming, and Engineering. Below I am transcribing the titles of the sessions, as they appear on the official program: * THURSDAY JUNE 9, 1994 * 10:30 Opening Ceremony 12:00 Highlight Session: The future of Radio, followed by Wine Reception Management: THURSDAY JUNE 9, 1994 14:30-16:00 The Co-existence of Public and Private Radio - The rules of the Game (The Funding of Radio) 16:30-18:00 Open Discussion 18:00-19:00 Traffic and service information Programming: THURSDAY JUNE 9, 1994 09:00-10:30 Continuity and Broadcast Operations (also Automation, and RDS in BBC Radio Networks) * FRIDAY JUNE 10, 1994 * Management: FRIDAY JUNE 10, 1994 08:00-09:00 Workshop: Methods of Audience Rating 09:00-10:30 Who will pay for new technologies? 11:00-12:30 What will DAB change in Broadacsting Life? 14:30-18:00 Maximising Advertising, Sponsorship and Sales Income Programming: FRIDAY JUNE 10, 1994 08:00-09:00 Workshop: Human Resources, How to Save your Job? 09:00-10:30 Changes in Musical Formats 11:00-12:30 The Future of International Programme Exchange 14:30-16:00 Is the Format Model Still Valid in Europe? 16:30-18:00 Is Automation Killing the Spirit of Radio? Engineering: FRIDAY JUNE 10, 1994 09:00-10:30 Training 11:00-12:30 Transmission and Reception (Excluding Digital Radio) 14:30-18:00 Digital Radio 18:00-19:30 Workshop- Additional Data Services for DAB: Dynamic Range Control (DRC) * SATURDAY JUNE 11,1994 * Management: SATURDAY JUNE 11,1994 08:00-09:00 Workshop - The Future of International Radio Services 09:00-10:30 The Regulation of Radio in the Year 2000 11:00-12:30 Marketing and Promotion Programming: SATURDAY JUNE 11,1994 08:00-09:00 Breakfast Session - New Tools and Applications for Integrated Research 09:00-10:30 Planning and Positioning the Station 11:00-12:30 Winning with Consultants Engineering: SATURDAY JUNE 11,1994 09:00-12:30 Production Environment and Acoustic Developements and, to end, on Saturday: FAREWELL EVENING: Concert and Buffet reception at the Auditorium Starvinski, Montreux. The technical Exhibition is open daily between 10:00-18:00. Any error or omission is mine, so check the source, and do not trust me :) FINAL NOTE, AND DISCLAIMER: Needless to say that I have no relation with the organizers, and for any details you have better to check with them: Phone: +41-21-963 3220 or fax: +41-21-963 88 51. They can take care of Hotel reservation as they did for me, as well as for travel, and Conference registration. I will be there, so if you plan to be there as well you may leave me a message at the desk, if you want. Please contact the 2nd Radio Montreux organizers for more information, *NOT* ME, please. Alfredo E. Cotroneo, NEXUS-Int'l Broadcasting Associaton PO BOX 10980, I-20110 Milano, Italy phone: +39-337-297788 / +39-2-266 6971 Fax: +39-2-706 38 151 ------------------------------ Date: Thu, 02 Jun 1994 11:51:44 -0500 From: Jonathan_Welch Subject: NYNEX Bill Insert - Rate Changes April 1994 bill insert on rate changes: On April 14, 1994 new rates became effective for our customers in Massachusetts. The new rates are reflected in this bill. These rate changes are part of a series of changes designed to gradually move the prices of NYNEX services closer to the actual costs of providing the services. NYNEX receives no additional revenue as a result of the new rates. Increases in prices of some services have been offset by decreases in prices of other services. RATE CHANGES AT A GLANCE Residence Services New Service: A new calling service is introduced for residence service cus- tomers in the 413 area code. The new optional calling plan is called CallAround 413 Plus Service and it allows unlimited calling within the 413 area code for a single monthly rate of $29.80, including the dial tone line rate. Exchange Service: Residence unlimited basic exchange service is increased by an average of $1.96. The residence measured service dial tone line rate is increased by $2.49 to $9.91. Circle Calling, a Residence Premium exchange service, is increased by an average of $4.57. Until now, residence unlimited exchange service had five sep- arate rates and Circle Calling Service had three, depending upon the exchange in which the service was provided. Now, there is a single statewide rate for each of these services. The applicable charges are: Residence unlimited one-party service - $16.85; Circle Calling Service - $34.24. Service Rates: The residence Temporary Suspension of Service charge equals the residential dial tone line rate. It increases by $2.49 to $9.91. Business Services Until now, business unlimited exchange line service and Private Branch Exchange (PBX) trunk service had four sepa- rate rates depending upon the exchange in which those ser- vices were provided. Now, there is a single statewide rate of $38.42 for each business unlimited exchange line and $57.63 for each unlimited PBX trunk. The 800 Service dial tone line monthly rate is reduced from $25.00 to $20.00. Operator-Handled Business, Residence and Coin Calls Operator-handled surcharges will continue to apply to opera- tor-assisted calls. Other Changes Rates for various analog private line services will be increased; the prices for some digital private line services will be decreased. Rates for Direct Inward Dialing Service for business Private Branch Exchange (PBX) trunks and stations are reduced. RESIDENCE SERVICE OPTIONS** Service Description Rates Measured Provides per-call charging on $9.91 all local calls Unlimited Provides unlimited calling within $16.85 the local calling area Two Party $11.75 Circle Calling Provides unlimited local calling $34.24 and toll-free calling within 20 miles CallAround 413 Provides unlimited calling within $29.80 Plus Service the 413 area code. **Not all services are available in all locations. Please consult the introductory pages of your NYNEX telephone directory for detailed information, or call your service representative at the telephone number on page 1 on the NYNEX Itemization of Account section of your bill. If you want or need to change your local service, there is no charge to change from Circle Calling to Basic Unlimited or Measured Service. HOW TO CONTACT US If you want more information or if vou have any questions about these changes, please call our Customer Response Center at 1 800 555-5000, weekdays between 7:30 am and 8:00 pm and Saturday between 9:00 am and 5:00 pm. If you are calling from outside Maine, Massachusetts, New Hampshire, Rhode Island or Vermont, please call a NYNEX Service Representative at the telephone number on page 1 of the NYNEX Itemization of Account section of your bill. Customers with disabilities should contact us at our Customer Contact Center for Individuals with Disabilities by calling 1 800 974-6006 (V/TTY). ------------------------------ Date: Wed, 01 Jun 1994 20:51:44 GMT From: Charbel_Tannous@engr.usask.ca (Charbel Tannous) Subject: Spread Spectrum Video Organization: University of Saskatchewan SPREAD SPECTRUM FOR INDOOR WIRELESS COMMUNICATION by Dr. Eric J. Salt, Dr. Surinder Kumar and Prof. David Dodds 250 page manual included $395. A comprehensive 3 cassette program for engineers and researchers wanting to achieve a thorough understanding of the principles of Spread Spectrum. [Six hours]. Description Principles of Spread Spectrum in a single path setting: Spreading with PN sequences. Effects of Broad-band Noise & Simultaneous users. Types of PN sequences. Receiver performance in the presence of Co-users. The In-Building channel: The effect of absorbers and scatterers. A ray model of the Channel. Delay power spectrum. Doppler spreading. Distance dependent loss. Statistical model of the Channel. The principles of Spread Spectrum in a Multiple Path Setting: Performance of a RAKE receiver. Effects of a Co-user on the decision variable. Performance calculation. Issues in Synchronization: Single user- Single path. Multiple Access- Single path. Multiple Access- Multiple path. SAW and RAKE Receivers in an in-building CDMA system: Matched Filter concepts. SAW devices for implementing Matched Filters. Receiver Structure using a SAW matched filter. System performance with a RAKE receiver. TABLE OF CONTENTS SECTION PAGES 1.Principles of Spread Spectrum in a Single Path Setting (Eric Salt) (a) Mechanisms for Spread and Despreading 1- 12 (b) Effects of a Co-User 13- 17 (c) Spreading Codes 18- 42 (d) Receiver Performance 46- 67 (e) System Performance Example 68- 72 2.The In-Building Channel (Eric Salt) (a) The Channel Viewed as a Collection of Scatters 73- 85 (b) Delay Spread & Coherence Bandwidth 86- 91 (c) Doppler Spread 92- 94 (d) Odds & Ends 95- 105 3.Principles of Spread Spectrum in a Multiple Path Setting (Eric Salt) (a) Simple Receiver in a Two-Path Channel 106- 112 (b) Two-Tap RAKE Receiver 113- 134 (c) Increasing the Capacity with Forward Error Correction & Sectorization 135- 148 (d) Pedagogical Example 148- 164 4.Issues in Synchronization (David Dodds) (a) Single User - Path 165- 169 (b) Multiple Access - Single Path 170- 174 (c) Search Strategies 175- 182 (d) Multiple Access - Multiple Path 183- 188 5.SAW and RAKE Receivers for In-Building CDMA Systems (Surinder Kumar) (a) Matched Filter Concepts 189- 200 (b) SAW Devices for CDMA Systems 201- 208 (c) CDMA Receiver Using SAW Devices 209- 220 (d) RAKE Receiver 221- 222 (e) Computer Simulation Results 223- 244 ** ORDER FORM ** To order: telephone, FAX or mail to: TRLabs, Suite 108- 15 Innovation Boulevard, Saskatoon, SK CANADA S7N 2X8 Tel: (306)-668-8200 FAX: (306) 668-1944 Please send me one (1) @ 395 Candian Funds $ _______________ Please send me additional sets @ $160.0 each $ _______________ Please send me additional manuals @ $180.0 each $ _______________ Please send me additional cassettes @ $80.0 each $ _______________ (Prices do not include shipping and handling) TOTAL $ _______________ Payment options: My cheque is enclosed _____ Please bill me _____ Purchase order # ____ Please charge my credit card: Visa _____ American Express _____ Card # _____________Exp. Date_______ Signature:________________________ PLEASE SHIP MY ORDER TO: Name:__________________________________ Title:__________________ Company Name:__________________________ Street:_________________ City:__________________________________ Province/State:________ Postal code/ZIP:_____________ Telephone:( )_______________ Fax:( )______________ About TRLabs: TRLabs is a non-profit joint Industry-University-Government collaboration in applied telecommunications research with the aim of contributing trained people and innovative technology to industry. TRLabs Sponsors: AGT Limited Digital Equipment Corp. QCC Communication Corp. Alberta Government Digital Systems Group Inc. Saskatchewan Government AT&T MTS Manitoba Government Bell Northern Research EDTel SaskTel Communications Canada LSI Logic Corp. SED Systems Inc. NovAtel Communications University of Alberta SMART Technologies University of Calgary University of Saskatchewan University of Manitoba WaveCom Electronics Inc. Develcon Electronics Ltd. ------------------------------ Date: Thu, 02 Jun 94 12:06:27 EDT From: Rick Watson Subject: ATT/MCI Numbering War > In an effort to snag more long distance telephone calls (charged to > a credit card or a third number), AT&T reserved the toll-free number > 1-800-OPERATOR. Not to be outdone, and perhaps knowing the public > better, MCI reserved the number 1-800-OPERATER and has been scooping > up calls intended for its arch-rival. Is this why AT&T is switching from 1-800-OPERATOR to 1-800-CALL-ATT? > [TELECOM Digest Editor's Note: AT&T had the latter of the two numbers in > service for quite awhile prior to starting 'OPERATOR'. I would not be > surprised to hear there was a lot of confusion between OPERATOR and > OPERATER however. PAT] You think thats where it ends? Try dialing 1-800-ATT-CALL. (You get MCI!) Rick Watson Telecomm Analyst/NYU Computer Center ------------------------------ End of TELECOM Digest V14 #267 ******************************