If you haven't worked with T1 before, you could be in for an unpleasant surprise. If you have, you'll already know that T1, the current network standard for business and professional Internet access, is neither efficient, easy to use, nor particularly well-suited to data transmission. T1: A Survival Guide, a practical, applied reference on T1 data transport, is a life raft for navigating the shoals of a 40-year-old technology originally designed for AT&T's voice network.
Throughout T1's long life, network administrators have mainly learned it by apprenticeship, stumbling on troubleshooting tidbits and filing them away until they were needed again. This book brings together in one reference the information you need to set up, test, and troubleshoot T1. T1: A Survival Guide covers the following broad topics:
- What components are needed to build a T1 line, and how those components interact to transmit data effectively
- How to use standardized link layer protocols to adapt the T1 physical layer to work with data networks
- How to troubleshoot problems and work with the telephone company, equipment manufacturers, and Internet service providers
In spite of its limitations, T1 is a proven, reliable technology that currently meets the need for medium-speed, high reliability Internet access by institutions of many sizes, and it's likely to be around for a while. T1: A Survival Guide will take the guesswork out of using T1 as a data transport.
| Preface |
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vii | |
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History of the U.S. Telephone Network |
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1 | (7) |
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1876-1950: Analog Beginnings |
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2 | (2) |
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1951-1970: The Birth of T-carrier |
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4 | (1) |
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1970-Present: The Modern Telephone Network |
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5 | (3) |
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T1 Architectural Overview |
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8 | (9) |
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Telecommunications Puzzle Pieces |
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8 | (9) |
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Basic Digital Transmission on Telephone Networks |
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17 | (5) |
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18 | (1) |
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18 | (3) |
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B8ZS and Clear Channel Capability |
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21 | (1) |
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Multiplexing and the T-carrier Hierarchy |
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22 | (10) |
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Building the T-carrier Hierarchy with Multiplexing |
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22 | (4) |
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26 | (1) |
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The Extended Superframe (ESF) |
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27 | (3) |
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Telephone Signaling on T1 Links |
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30 | (2) |
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Timing, Clocking, and Synchronization in the T-carrier System |
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32 | (12) |
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32 | (3) |
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35 | (6) |
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Slips: When Timing Goes Bad |
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41 | (3) |
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44 | (12) |
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Line Build Out: Moving Between Theory and Practice |
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44 | (4) |
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48 | (3) |
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51 | (2) |
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53 | (3) |
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Connecting the Umbilicus: Getting TI Connectivity |
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56 | (7) |
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56 | (1) |
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T1 Installation and Termination |
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57 | (3) |
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60 | (1) |
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61 | (1) |
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62 | (1) |
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High-Level Data Link Control Protocol (HDLC) |
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63 | (13) |
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64 | (1) |
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65 | (5) |
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70 | (6) |
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76 | (39) |
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77 | (1) |
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PPP Logical Link States and State Machines |
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78 | (5) |
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PPP Encapsulation and Framing |
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83 | (2) |
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Link Control Protocol (LCP) |
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85 | (24) |
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PPP Network Control and the IP Control Protocol |
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109 | (3) |
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112 | (3) |
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115 | (17) |
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Frame Relay Network Overview |
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116 | (2) |
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The Frame Relay Link Layer |
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118 | (2) |
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Multiprotocol Encapsulation with RFC 1490 |
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120 | (2) |
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The Local Management Interface |
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122 | (8) |
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130 | (2) |
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132 | (17) |
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Basic Troubleshooting Tools and Techniques |
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132 | (6) |
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138 | (1) |
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139 | (6) |
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145 | (4) |
| A. Access Aggregation with cT1 and ISDN PRI |
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149 | (18) |
| B. Multilink PPP |
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167 | (25) |
| C. T1 Performance Monitoring |
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192 | (13) |
| D. SNMP |
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205 | (21) |
| E. Cable Pinouts and Serial Information |
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226 | (10) |
| F. Reference |
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236 | (21) |
| Glossary |
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257 | (8) |
| Index |
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265 | |
Matthew S. Gast is a former aspiring research physicist who found computer networking too addictive for his own good. He was initially hooked during a summer research program, when he found the Ethernet drop in his dorm room far more interesting than his assigned task of developing monitoring software for a particle accelerator. Upon returning to academic life in the fall, he suffered severe withdrawal symptoms, which he conquered only with the help of a new religion-Unix. He has been connected and sober since that fateful summer. Matthew is currently a Research Fellow at Nokia. His work deals with the intersection of mobility and security, with frequent excursions into routing and cryptography. In the course of daydreaming about changing the world, Matthew has been known to imagine networks that are much less complicated and repetitive to manage. Frequent travels take him away from his Silicon Valley home to a variety of locations throughout the U.S. and Europe, including the occasional visit to the corporate headquarters in Finland. On his last trip to Finland, Matthew crossed the Arctic Circle on a snowmobile in February. Matthew is the coauthor of Network Printing (also published by O'Reilly) as well as several other articles and white papers.
