Advanced Digital Network (ADN) ---------------------------- Description ----------- Advanced Digital Network (ADN) is a digital, private line transport service that provides full duplex four-wire transmission of synchronous serial data. ADN boasts a complete range of features including variable speeds, customer-controlled network reconfiguration, and network control and diagnostics. You can even combine your 1.544 mbps High Capacity Digital service with ADN service to take advantage of High Capacity Digital Service (HCDS) economies. ADN's evolutionary, microprocessor-based technology offers the most advanced transmission capabilities available today. This innovative technology offers new speeds -- 19.2, 32, 38.4, and 64 kbps. For the first time, variable speeds and new network control and diagnostics are available to you in a digital format. Meanwhile, ADN's error control capabilities exceed all existing standards for error correction performance. And while it offers many Integrated Services Digital Network (ISDN) capabilities now, ADN also allows a smooth transition into your ISDN future. Flexibility ----------- If your organization is growing, you are well aware of the need for control and flexibility of your communications resources. ADN offers unsurpassed flexibility that helps you meet the demands on your network more efficiently. The variable speed service will help you support multiple applications. ADN's reconfiguration lets you adapt your network to meet daily, occasional, or seasonal data traffic needs; you can reconfigure your T-1 network or individual channels over dial-up or dedicated facilities. Or, if you prefer, a Pacific Bell employee will reconfigure your network for you when you contact the Customer Interface Management Site (CIMS). Disaster Recovery ----------------- ADN's reconfiguration is the ideal solution for handling a disaster recovery situation. If a key element in your network fails, you can immediately reroute traffic to circumvent the problem. And ADN's network control and diagnostics help you monitor performance, identify and isolate problems, and make adjustments within the network so that you can obtain optimal use of your network. Universal Availability ---------------------- ADN provides intraLATA service and will connect to interLATA services. Effective Network Control ------------------------- If your company is growing, you realize the value of complete network flexibility, as sell as advanced network control and diagnostic capability. With the constant flux in communications, your business will benefit from communication channels that are available and can be changed virtually on demand. With ADN, you get this and more. Improved Efficiency ------------------- Customer network management features make ADN one of the most efficient networks available today. You can finally eliminate the inefficiency of over-trunking to prepare for peak demand periods. With ADN's network reconfiguration feature, you can route your overload voice or data traffic to the underutilized legs of your network. You can minimize the impact of a failure in any critical element in your network. With ADN's network reconfiguration capability you can keep your business running smoothly by routing traffic around the problem component. Dependability ------------- All of ADN's components have proven highly dependable throughout extensive evaluation and testing. Much of ADN uses Pacific Bell's reliable network: the local loop, the T-1 link, the digital cross connect system, the master controller (for your network reconfiguration), and the synchronization network. And the truly new, intelligent technology in our Serving Wire Centers have undergone rigorous testing and have proven the extraordinary reliability expected of a Pacific Bell network product. Proven Technology ----------------- The digital cross-connect system used for your ADN network has acquired a reputation, over many years and several thousands of hours of service, as a trouble-free system for user-controlled network management. Meanwhile, the critical components are located in Pacific Bell Serving Wire Centers, which ensures that maintenance will be available around-the-clock by trained personnel to ensure rapid restoral. System Security --------------- Because ADN is provisioned in Pacific Bell Serving Wire Centers, it offers a degree of security unattainable by customer-premises equipment. It offers security features that make it one of the most safeguarded systems in the Public Network. If you want control over individual channels of your T-1 network -- either at a predetermined time or on demand -- you can have it with ADN's network reconfiguration feature. You can manage network addresses, perform loopback tests, activate and deactivate network devices, set default parameters, and arrange time-of-day routing -- among other control functions. Operational Control ------------------- ADN offers the operational control that you need over your telecommunications network. ADN's combination of network reconfiguration, control, and diagnostics features lets you customize your level of control. The multi-level security used with ADN's customer network reconfiguration will satisfy even the most security-minded network manager. Through a mix of network, system, and application security levels, access is limited to authorized customers or authorized users within the customer's business. Single Point of Contact ----------------------- The Customer Interface Management Site (CIMS) is a central response center for your ADN service needs. And not only will CIMS be there if you need assistance, they will even step in to reconfigure your network according to your instructions. Data Service Unit (DSU) or Adaptive Data Service Unit (ADSU) ------------------------------------------------------------ The customer-provided Data Service Unit or Adaptive Data Service Unit is the only piece of equipment that you need to have in order to use the ADN service. for fixed speeds of 2.4, 4.8, 9.6, 19.2 and 56 kbps, you can use your existing Channel Service Unit/Data Service Unit. The Adaptive Data Service Unit is a new customer-provided Data Service Unit that is able to interact with the new capabilities of ADN; it is currently available from a number of distributors. Local Loop ---------- The local loop is a four-wire, non-loaded copper pair that connects your premises to the local Serving Wire Center. Serving Wire Center (SWC) ------------------------- Each Serving Wire Center has a time division multiplexer, called a D4 digital channel bank, that combines 24 digital channel signals into one digital T-1 carrier signal. Interoffice Facilities ---------------------- Fast, accurate T-1 carriers on optical fiber or copper connect the Serving Wire Centers and the digital cross-connect nodes. Fiber optics will the the first choice facility to connect nodes and Serving Wire Centers. Digital Cross-Connect System (DCS) Node --------------------------------------- A digital cross-connect system node is a Serving Wire Center that houses a digital cross-connect system through which all traffic passes. The digital cross-connect system is a software- controlled time division switch that interconnects the T-1 systems. It facilitates network administration, disaster recovery, and remote single point testing. Master Controller ----------------- The master controller is a remote processor that communicates with each digital cross-connect system node. It provides the capability to access and store models or predetermined routing plans. The master controller provides security and partitioning capability to maintain complete network security. Variable Speeds --------------- ADN's variable speed capabilities let you change your network's transmission speed to meet your unique data needs. You can use your Adaptive Data Service Unit (ADSU) to change the data rate for specific applications or to automatically slow your transmission speed when unacceptable error levels are reached. The master Adaptive Data Service Unit will change the rate; all devices will match the rate. ADN offers variable speed selection in two ranges: - 1.2 to 38.4 kbps, including 1.2, 2.4, 4.8, 9.6, 19.2, 32 and 384. kbps. - 1.2 to 64 kbps, including 1.2, 2.4, 4.8, 9.6, 19.2, 32, 38.4, and 64 kbps. Network Error Correction: And innovative, new forward error correction technique is included with the 1.2 to 64 kbps variable speed range. If an error occurs, ADN will automatically correct it, making your transmissions as error-free as possible. This technique improves the network error performance by a factor of 10(-5). Network Control and Diagnostics ------------------------------- With ADN, you can choose from a host of optional network features. You will have as much control over your ADN network as you need; if you prefer, Pacific Bell will perform the ADN network control and diagnostics functions for you. The network control and diagnostics features allow you or Pacific Bell to monitor the network performance of your Pacific Bell ADN services and adjust for conditions in the network or environment. For example, by assigning addresses to the intelligent elements in Pacific Bell's ADN Service, you can monitor segments of the circuit. You can: - Check the status, address, and speed of each intelligent unit - Perform loopback tests to help isolate problems - Measure error performance - Activate and deactivate circuit segments on a selective basis Network Reconfiguration ----------------------- Reconfiguration off your network is available with ADN's fixed or variable speed service. With it, you can adapt your network to meet changing communications needs. Or, if you prefer, you can call in your reconfiguration needs and a Pacific Bell employee will reconfigure your network for you. You or Pacific Bell can: - Change your individual circuit segments or your T-1 network on demand - Establish time-of-day routing, which reroutes traffic at a predetermined time - Circumvent trouble spots if a network component fails. - Route overload traffic to the underutilized legs of your network during peak hours. If you plan to manage the network reconfiguration feature, you will need a standard RS232 terminal so that you can send your reconfiguration instructions to the master controller. Secondary/Subchannel Capability ------------------------------- ADN's fixed or variable speed service offers a lower speed, derived data channel that operates with your primary data channel. You can use this secondary/subchannel for exchanging test, diagnostic, measurement, and control messages between remote terminals. Or you can use as a slow speed, general purpose data channel to transport information such as air conditioning, heating, lighting, refrigeration, or smoke and security alarm information. ADN Applications ---------------- Banking or Finance ------------------ Banks and finance companies demand secure data transfer over high- speed, private airlines. Bank teller networks, credit verification systems, and other mainframe applications require daily back up to protect customer records. ADN meets these needs and provides applications for Automatic Teller Machines, Point of Sale terminals, and video teleconferencing among branches. The daily transfer of large amounts of money over the FedWire packet switching network remains one of the most critical banking functions. With the proliferation of bank mergers and acquisitions, consolidating and transferring data to a centralized location has taken on a new meaning. ADN can help create a single, unified network with flexible connections and access to Pacific Bell's Public Packet Switching Network. Meanwhile, the Securities and Exchange Commission requires that stock brokerage firms and finance companies provide extensive disaster recovery facilities, including duplicate operations for both computer processing and telecommunications. These facilities may involve an enormous cost. ADN, however, incorporates redundancy into a single network instead of duplicating capability for separate voice and data networks. Education --------- In a campus environment, ADN has a multitude of applications: file transfer, network management, computer-aided design/computer- aided manufacturing, disaster recovery, time-of-day routing, and LAN-to-LAN linkages all have a place in the world of education. ADN's most valued applications are those that help attract top- notch students and faculty. Interactive television and teleconferencing, for example, are being used by many colleges and universities. This provides a way to reach satellite campuses, continuing education students, and local businesses involved in research consortia. However, setting up such a network can be both tedious and expensive. With the flexible connectivity of ADN, linking groups of students, teachers, and practitioners is easy. ADN is also ideal for information retrieval -- linking a card catalog data base to library terminals around campus. This dedicated link allows speedy library searches from many locations and creates a system that is easy to update, maintain, and use. Retail ------ In the competitive retail environment, customer service departments need streamlined data communications to ensure prompt, courteous responses to consumers' needs. Electronic funds transfer, Point of Sale terminals, disaster recovery, time- of-day routing, and LAN-to-LAN communication all play a role in improving customer service capabilities. An automated, paperless inventory system is one way that ADN can bring a retail business up-to-date. Many retailers will benefit from a highly efficient inventory system that facilitates restocking -- with little or no involvement from managers. By creating a flexible network between corporate headquarters, suppliers, retail outlets, and the public, you can keep abreast of customers' buying patterns, stock only what sells, and reduce your need for a large inventory. Manufacturing ------------- Many manufacturers today have recovered from the harsh economic realities of past decades. Yet a deindustrialized economy continues to force manufacturers toward even greater productivity and strategic positioning. ADN can create an advanced communications system that is flexible enough to accommodate your innovative environment. To increase your productivity and reduce paper flow, you may have established an automated inventory system or a LAN to link production plants, sales offices, and research groups. ADN can provide further efficiency by linking these partial, innovative solutions into a comprehensive dedicated network. And you can use ADN for other applications such as transferring files, managing your network, video teleconferencing, retrieving data base information, accessing computer-aided design/computer- aided manufacturing information, recovering from disasters, and time-of-day routing. File Transfer ------------- Businesses small and large need secure data transfer between computers. Whether a hospital is receiving laboratory results, a manufacturer is transmitting inventory or design information, or a government office is performing daily tasks, businesses depend upon the ability to transfer files. With ADN, the complexities of transporting sensitive information on magnetic tape or diskettes are not a worry. ADN provides direct data links for secure, fast, and dependable transmission on demand or at a set time each day or week. Electronic Funds Transfer (EFT) ------------------------------- Today's fierce competitive banking environment calls for innovative solutions which are often costly to establish and maintain. Electronic funds transfer, for example, can help maximize your Organization's profitability -- but only if efficient, cost-effective telecommunications services are used to get you there. ADN can help you connect your customers so money can be transferred whenever necessary. And because ADN is as secure and error-free as possible, you can be sure that your transfer will happen as planned. Automated Teller Machines (ATMs) -------------------------------- Today's consumers are on the run and demand the conveniences of Automated Teller Machines. If your bank or retail business offers ATMs or Point of Sale (POS) terminals, you know that these online transactions require a highly reliable, secure, and fast circuit so that consumers can deposit, withdraw, and transfer funds around-the-clock. ADN is a superior transmission medium for these online applications. Video Teleconferencing ---------------------- Video teleconferencing is a valuable tool for many organizations. Educational institutions can telecast lectures or laboratory experiments to business or satellite college campuses. Manufacturing plants can use video to cross-train employees. Police departments use video teleconferences with District Attorneys' offices when questioning crime witnesses. Transportation departments can use video for freeway surveillance. And teleconferencing saves costly travel and time for many corporations. ADN is a perfect medium for limited duration, high band-width applications such as broadcasting and teleconferencing. The network reconfiguration feature lets you establish real-time, point-to-point, video teleconferences on demand or on a daily or weekly schedule. Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) ------------------------------------------------------------ If you work in a manufacturing or high-tech environment, you are aware that your communications requirements can increase dramatically when your company adds complex simulations programs. Technologies such as 3-D imaging, mechanical or chemical simulations, and precise variance calculations may require new links with data bases and computer networks. ADN can help you provide a dependable system to meet the demands of the engineering staff. With ADN, you can ensure that design engineers will have ready access to the computer-aided design/computer-aided manufacturing host -- and that you will receive maximum productivity from your company's computer-aided design/computer-aided manufacturing system. Disaster Recovery ----------------- If your business has critical information stored in a data base or depends upon daily contact with the data center, you realize the importance of protecting yourself from power or equipment failures. In the event of an emergency -- caused by natural disaster, line failure, or human error -- you must quickly switch to a backup processor, restore computing facilities, and retrieve backup tapes of data base information to guarantee communications among departments, decision-makers, and the public. ADN will allow you to prepare for an emergency. Just transmit your preplanned network routing models to Pacific Bell's master controller. In the event of a disaster, you can simply send the instruction to execute the mapped plan, and the network will begin the backup recovery procedures. And if you experience a line failure in a portion of your network, you can easily reconfigure your network to route critical data traffic to an alternate processing center. LAN-to-LAN Interconnection -------------------------- In many businesses, departmental computing systems are isolated islands of computing power. Advanced Digital Network can link your departmental systems so that users can access more of the data resources available to them. And if your business is expanding or launching a new service offering, ADN can help you establish communication links between multiple locations without compromising efficiency or wasting resources. As the technology or your needs change, you can expand or reconfigure your system for maximum efficiency. Low Error Rate -------------- ADN has an error performance objective of 99.5%, which is comparable to existing digital services. Withe the sophisticated error correction techniques offered with the 1.2 to 64 kbps variable speed option, steps will automatically be taken to correct any errors that occur -- making your transmissions surpass the objective of 99.5%. Its error correction techniques alone have improved the inherent network error by a power of 10(- 5). Dependable Network ------------------ The dependable digital cross-connect system that you will be using is a trouble-free system for managing your network. Because the critical network components are located in Pacific Bell's Serving Wire Centers, you are guaranteed that maintenance will be available 24 hours a day. ADN is available in a Fixed Speed and a Variable Speed service. With Variable Speed the user has the option of changing speeds. Fixed Speeds Installation Monthly ------------ ------------ ------- - 2.4 kbps $620.00 $50.05 - 4.8 kbps $620.00 $50.05 - 9.6 kbps $620.00 $50.05 - 19.2 kbps $620.00 $50.05 - 56.0 kbps $620.00 $50.05 plus $6/month per airline mile Variable Speeds Installation Monthly ------------ ------------ ------- - 1.2 to 38.4 kbps $620.00 $66.85 plus $6/month per airline mile - 1.2 to 64.0 kbps $620.00 $75.25 plus $12/month per airline mile For More Information -------------------- For more information on Pacific Bell's Advanced Digital Network, contact your Pacific Bell account team.