Introduction to PCS Networking Application Note 1219 Telecommunications Soneplex ® PCS System Collocated in the BTS The Personal Communication Services (PCS) network is a digital network that has the same basic components and standards as cellular networks. A PCS network consists of a mobile switching center, base station transceivers or cell sites, and base station control- lers connected to a network service provider. The mobile switching center typically handles 100,000 subscribers. It connects the radio network to the service provider’s telephone network. The base station controller handles link handoffs, acts as an administrator for the location register and concentrates and routes the traffic from several cell sites to the mobile switching center. The cell site radio equipment requires one or two DS1 circuits connected to the local exchange carrier’s network by optical fiber, T1 or High bit-rate Digital Subscriber Line (HDSL). The cell site equipment is located in the last link of the PCS network and is usually owned by the local exchange carrier (LEC). Typical PCS Network M1/3 Switch Microwave Radio Microwave Radio Transport Equipment Transport Equipment Cell site radio Equipment Mobile Switching Center Base Station Controller Base Transceiver Station (Cell site) Last Link (T1, HDSL,Fiber) Network Service Provider (Local Exchange Carrier) DSX-1 2 Soneplex ® PCS Digital Transport Equipment Application Note 1219 Collocation of T1 transport equipment and customer demarcation point within the base transceiver station (BTS) The Soneplex PCS System, used in conjunction with the Soneplex Loop Extender System or Soneplex Broadband System, is an inexpensive, flexible way of providing DS1 service delivery in the last link of a PCS network. The Soneplex Loop Extender chassis or Soneplex Broadband chassis is located in the central office or remote terminal for extension of DS1 circuits over copper or fiber facilities to the Soneplex PCS System deployed in the Base Transceiver Station (BTS). In most applications, the network provider will use existing outside plant cable facilities to extend the DS1 service to the BTS. Two questions arise when planning a PCS network: 1) What type of outside plant cable runs past the BTS, copper or fiber? 2) Where is the demarcation point, inside or outside the BTS? Where the customer's demarcation point is located inside the BTS, the Soneplex PCS System is an ideal solution. In this application (see figure 1), collocation is possible, eliminating the need for a separate pedestal or outside plant cabinet to house the transport equipment. The elimination of separate enclosures saves on valuable real- estate and reduces the capital investment of the PCS network. In addition, the Soneplex PCS System provides a single solution for DS1 services over copper or fiber. With other systems, the network provider must install one product to extend optical DS2 (6.3 Mbps) services over fiber to the BTS. And, the Soneplex PCS system's built-in intelligence provides T1 circuit visibility for remote trouble sectionalization and identification. This integrated intelligence reduces the need for a separate monitoring overlay system, lowers overall technical dispatch expenses and improves the service provider's business case. Application T1 Transport Collocation Figure 1 STS-1 X.25 SYSTEM MANAGEMENT MODEM LOCAL CRAFT PORT DS3 OPTICAL HDSL T1 DS1 BTS DS1 VOICE RADIO RACK BTS DS1 VOICE RADIO RACK BTS DS1 VOICE RADIO RACK NETWORK TO PCS PROVIDER CENTRAL OFFICE OR REMOTE TERMINAL SONEPLEX SYSTEM SONEPLEX SYSTEM SONEPLEX SYSTEM SONEPLEX SYSTEM 3 Soneplex ® PCS Digital Transport Equipment Application Note 1219 Soneplex PCS Digital Transport Equipment Package The Soneplex PCS System provides a flexible, low cost solution for T1 service delivery in the last link of the wireless network. The system is completely modular and designed to be space-efficient for both copper or fiber-based PCS applications. Each chassis is 1.75" high (1 rack space) and fits into a 19-inch relay rack. The system can be preconfigured for T1 transport over HDSL, T1 or Optical DS2 facilities or any combination. Modular components, including a fiber splice tray, CSU panel and front access panel are also available to custom design your own PCS system. All components are wired for -24 VDC power (-48 VDC is also available). Figure 2 shows a variety of applications using copper and fiber facilities to feed DS1's to a cellsite where the customer demarc is collocated with the transport equipment. The Federal Communications Commission auctioned 99 licenses for PCS, in 51 market regions that covers the United States, its territories and protectorates. This action raised $7 billion for the U.S. Treasury. The top three winners purchased 61 of the 99 licenses. WirelessCo, a consortium of Sprint and three large cable TV companies bid $2.1 billion for 29 licenses. AT&T Wireless PCS Inc. bid $1.7 billion for 21 licenses. PCS PRIMECO, a consortium formed by Bell Atlantic, NYNEX, Pacific Telesis’ spin-off AirTouch Commu- nications, and U S West bid $1.1 billion for 11 licenses. The PCS winners must provide service coverage equal to 1/3 of the area population within five years. Coverage for the other 2/3 must be provided within 10 years. Figure 2 Soneplex PCS Transport System HDSL HDSL Soneplex Broadband System DS3 or STS-1 HSW APU MPU 2B1Q OSS TL1 X.25 TBOS CRAFT INTERFACE VTMM or DS3 MUX WORKING/PROTECT EC1M DSX HSP TAU MXW MXP DLX ODS2 P HLXC ODS2 W HLXC Mid-Span Repeater RLX Fiber splice CSU CSU H L X D S X Cell Site Radio Fiber splice CSU CSU H L X D S X Cell Site Radio Fiber splice QLX H L X D S X Cell Site Radio Fiber splice CSU CSU H L X D S X Cell Site Radio T1 SPAN Line Repeater 1219 4/97 Original © 1997 ADC Telecommunications, Inc. All Rights Reserved An Equal Opportunity Employer Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters office in Minneapolis. ADC Telecommunications, Inc. views its patent portfolio as an important corporate asset and vigorously enforces its patents. Products or features contained herein may be covered by one or more U.S. or foreign patents. ADC Telecommunications, Inc. 4900 West 78th Street Minneapolis, Minnesota 55435 FAX: (612) 946-3292 From North America, Call Toll Free: 1-800-366-3891 Outside of North America: 612-938-8080 Home Page Address: http://www.adc.com International Sales Offices: Belgium 32-2-712-6500 • United Kingdom 44-734-441955 • Montreal, Quebec (514) 677-9166 • Vancouver, BC (604) 270-1675 • Toronto, Ont. (905) 629-3104 • Ottawa, Ont. (613) 723-2171 • Singapore 65-225-8228 •Venezuela 58- 2-286-1444 • Mexico City, Mexico 525-658-4519 • Buenos Aires, Argentina (541) 449- 2669 • Sao Paulo, Brasil 55-11-3040-0666 • Sydney, Australia 61-2-9975-1499 • Melbourne, Australia 61-3-9585-3931 • Beijing, China 86-10-6500-7001 • Dusseldorf, Germany 49-211-370-350 . the BTS, copper or fiber? 2) Where is the demarcation point, inside or outside the BTS? Where the customer's demarcation point is located inside the. Introduction to PCS Networking Application Note 1219 Telecommunications Soneplex ® PCS System Collocated in the BTS The Personal Communication