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Rising to the FCC challenge.

After some highly publicized cases of cellular telephone callers not being located by emergency rescue teams for hours, the FCC issued Docket 94-102 rules to govern provision of basic 9-1-1 services and enhanced 9-11 (E9-1-1) for wireless services.

By the year 2001, the location of the mobile station must be provided to the Public Safety Answering Point (PSAP) in two dimensions (x,y), accurate within a radius of 125 meters in 67% of all cases.

For a mix of reasons--including opportunism, fortuitous architecture, and industry vision--some companies are stepping up to the challenge of Docket 94-102, companies like The Associated Group, CML Technologies, Plant Equipment, and SCC Communications Corp.

Plant Equipment, a longtime supplier of telephony and 9-1-1 products, recently evaluated its 9-1-1 product line in light of wireless integration issues. The company believes that existing users of the Modular ANI/ALI Retrieval System (MAARS) will be able to comply with Phase I of the rules by installing a software upgrade.

Phase I requires wireless carriers to transmit 9-1-1 emergency calls to a PSAP identifying both calling mobile unit (ANI) and cell site or cell site sector. The emergency caller must transmit a mobile identification number or its equivalent and the local 9-1-1 district must request ANI transmission from the wireless carriers. Phase I compliance is required by 1998.

Phase II requires wireless carriers to relay an emergency caller's number, allow PSAP attendants to redial the caller in case of disconnection, and relay the location of the base station or cell site receiving the 9-1-1 call.

"We have the system to meet the new standards through simple migration architecture," says John K. Fuller, Plant Equipment's vice president of marketing. Users will achieve Phase II compliance by migrating to MAARS-View or VESTA platforms.

CML Technologies has been testing wireless call solutions since early 1994 and offers two solutions for wireless call identification: the Signaling Interface Router (SIR) and ANI Message Integrator (AMI).

The SIR receives wireless call data from the Mobile Telephone Switching Office (MTSO), converts the data to standard eight-digit ANI, selectively routes the call to an appropriate PSAP, and sends location information via a separate data stream to the address locator information (ALI) database. AMI software receives the wireless location and call-back number from the SIR and sends it to a PSAP when the ALI query is made.

SCC Communications Corp. has been a key participant in wireless integration testing. The company has developed a product called 9-1-1 Connect that enables PSAPs to receive wireless 9-1-1 calls using existing premise equipment and networks. It also allows wireless carriers to offer 9-1-1 service with standard wireless data and network interfaces.

Lou Stilp, vice president and general manager of The Associated Group, invented and patented Time Difference of Arrival (TDOA) in 1994. This technology forms the core of the company's TruePosition automatic location system for wireless subscribers. TruePosition is a passive overlay system that complements existing cellular and PCS network architectures.

Consisting of four major sub-systems--Signal Collection System (SCS), TDOA Location Processor (TLP), Application Processor (AP) and Network Operations Center (NOC)--the system doesn't require any changes to premise equipment, and only minimal cell site modification.

Stilp worries about the dynamics of providing wireless location information. Wireless networks are substantially different from their wireline counterparts. Cellular operators continually tune their networks to improve transmission quality, adjusting antenna coverage as new cell sites come on line. The newer PCS infrastructure is even more volatile.

Every addition of a base station or cell site, every negligible turn of an antenna, affects the positioning information forwarded to TruePosition and other wireless position locating systems.

Eric Sorensen, product marketing manager at SCC, is concerned about the volatility of the wireless network, too. He notes that a 5% adjustment in antenna attitude moves its coverage area several degrees, more than enough to produce location errors.

Kent Sander, a veteran of Ericsson Radio Systems and The Associated Group's new president and chief operating officer, says cellular carriers are taking "very seriously" the integration of wireless calling into the emergency services environment. They have "stepped up to do what's necessary," he believes.

RELATED ARTICLE: Latest 9-1-1/e9-1-1 Products

EMERGENCY INFORMATION database service provided through 911 Plus. Information like medical history, pre-existing conditions/family member location information routed to PSAP from secure database when subscriber dials 9-1-1. Basic information appears on call taker's screen, including primary language, family member medical conditions. Additional information available to call taker as required. -- LifeSafety Solutions

PSAPS RECEIVE WIRELESS calls with 911 Connect using existing customer premise equipment and network. Wireless carriers offer 9-1-1 service with standard wireless data/network interfaces. FCC compliant, fault-tolerant, fail safe configuration. Uses SCC's "Point-in-Polygon dynamic call routing technology. Switch control interfaces include switch adjunct processor, CCSS7 SCP, direct switch supervision, recent change order interfaces. -- SCC Communications Corp.

COMPUTER-AIDED DISPATCH system for Fire, VisiCAD system designed for metro/wildland fire departments. Incorporates vehicle routing, high resolution integrated mapping functionality, comprehensive graphical reports, fire/emergency medical triage system. Windows NT/SQL Server database configuration. Other features include configurable response plans, seasonal bump and cover, integrated EMS (ProQA or custom application), records management. -- American TriTech

PREPARE FOR WIRELESS telephony with the ECS-1000 Selective Router. Digital product supports 14-digit ANI, integrates powerful PSAP controller, requires only software upgrade to interface with Feature Group D trunks and to be compatible with personal number portability, ISDN and 557. ANI Message Integrator can substitute (x,y) coordinate pair for cell site/sector location ID. -- CML Technologies

RECORD UP TO 20 telephone conversations with integrated Instant Recall Recorder (IRR) and TDD options for model 3100 PSAP Telephone Console. Line-by-line recording enabled. Fast forward/reverse for message searching. Playback audio can be routed to handset/headset. TDD option supports Baudot/ASCII communications at 45.5, 300 b/s, with automatic protocol selection. Compliant with NENA-04001. -- Zetron

USE DIGITAL ISDN circuits to extend network reach/efficiency with SecureLink multiplexer family, a turnkey product line designed to support federal SecureNet transmission of encrypted voice traffic. PC-based remote/local configuration, diagnostics and performance monitoring, local and remote loopback.. Carries voice and data (including 9.6 kb/s synchronous and LAN data) as well as control information. Supports up to four clear/ encrypted full-duplex channels on two B-ISDN circuits, capable of independent routing. -- Intraplex
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Title Annotation:Industry Trend or Event; includes related article on 911 and E911 products; implementing FCC's wireless 911 and enhanced 911 regulations
Publication:Communications News
Date:May 1, 1997
Previous Article:Putting wireless 9-1-1 on the map.
Next Article:The battle for bandwidth.

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