- T1: A Survival Guide
- Preface
- 1. History of the U.S. Telephone Network
- 2. T1 Architectural Overview
- 3. Basic Digital Transmission on Telephone Networks
- 4. Multiplexing and the T-carrier Hierarchy
- 5. Timing, Clocking,and Synchronization in the T-carrier System
- 6. Mysteries of theCSU/DSU
- 7. Connecting the Umbilicus: GettingT1 Connectivity
- 8. High-Level Data Link Control Protocol (HDLC)
- 9. PPP
- 10. Frame Relay
- 11. T1 Troubleshooting
- A. Access Aggregation with cT1 andISDN PRI
- B. Multilink PPP
- C. T1 Performance Monitoring
- D. SNMP
- E. Cable Pinouts and Serial Information
- F. Reference
- Glossary
- Index
- Colophon
The master troubleshooting flow is shown in Figure 11-4. First, make sure that the appropriate cables are plugged in. (I once called in a trouble ticket when the CSU/DSU had not been plugged into the demarc.) Also ensure that the line is administratively enabled.
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