61204011L1-1
DSU IV ESP User Manual
E-1
Appendix E
DSU to DSU Tail Circuit
MODEM TAIL CIRCUIT APPLICATION
A DDS Tail Circuit is a serial connection of two DDS circuits as
shown in Figure E-1 on page E-2. The two circuits are joined at the
DTE port interface of each DSU unit. A special tail circuit crossover
cable is required so that the transmit line connects to the receive
line on the other DSU and the DTR, CTS, RTS, and CD signal lines
get matched appropriately. Figure E-2 on page E-3 details the
crossover cable wiring.
ADTRAN DSU/CSU units will operate in this configuration.
ADTRAN does not recommend the tail circuit mode due to the potential
for clock slippage and data loss when using this configuration. Moreover,
further problems can occur when each DDS circuit is using a different
master clock source and will require additional hardware called a tail cir-
cuit buffer to reduce the risk of data overruns and clock slips.
Summary of Contents for DSU IV ESP
Page 54: ...Chapter 4 Applications 4 8 DSU IV ESP User Manual 61204011L1 1...
Page 80: ...Chapter 8 Configuring Test Options 8 4 DSU IV ESP User Manual 61204011L1 1...
Page 92: ...Chapter 9 Configuring Dial Options 9 12 DSU IV ESP User Manual 61204011L1 1...
Page 104: ...Chapter 11 Configuring Unit Utilities 11 6 DSU IV ESP User Manual 61204011L1 1...
Page 108: ...Chapter 12 Activating Dial Functions 12 4 DSU IV User Manual 61204011L1 1...
Page 134: ...Chapter 14 Viewing Status Information 14 6 DSU IV ESP User Manual 61204011L1 1...
Page 140: ...Appendix A Pinouts A 6 DSU IV ESP User Manual 61204011L1 1...
Page 152: ...Appendix B AT Commands B 12 DSU IV ESP User Manual 61204011L1 1...
Page 168: ...Appendix D Configuration Profiles D 4 DSU IV ESP User Manual 61204011L1 1...
Page 172: ...Appendix E DSU to DSU Tail Circuit E 4 DSU IV ESP User Manual 61204011L1 1...
Page 176: ...Appendix F Specifications Summary F 4 DSU IV ESP User Manual 61204011L1 1...
Page 190: ...Appendix H Glossary H 10 DSU IV ESP User Manual 61204011L1 1...
Page 194: ...Index Index 4 DSU IV ESP User Manual 61204011L1 1...
