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Appendix E: Glossary and Acronyms
E1
The European equivalent of North American T1, transmits data at 2.048
Mbps, up to 32 voice channels (DS0s).
E3
The European equivalent of North American T3, transmits data at 34.368
Mbps, up to 512 voice channels (DS0s). Equivalent to 16 E1 lines.
EMI
Electromagnetic Interference
Unwanted electrical noise present on a power line
full duplex
Data transmission in two directions simultaneously.
FXO
Foreign Exchange Office
Receives the ringing voltage from an FXS device. Outside lines are
connected to the FXO port on your TDM400P card.
FXS
Foreign Exchange Station
Initiates and sends ringing voltage. Phones are connected to the FXS ports
on the TDM400P card.
G.711
The International Telecommunications Union recommendation for an
algorithm designed to transmit and receive maelaw PCM voice and A-law
at digital bit rate 64 Kbps. This algorithm is used for digital telephone sets
on digital PBX.
Содержание TDM400P
Страница 1: ...TDM400P User s Manual June 28 2005 Release 1 0...
Страница 12: ...Page 12 Digium Inc Release 1 0 Table Of Contents...
Страница 30: ...Page 30 Digium Inc Release 1 0 Chapter 2 Card Installation...
Страница 36: ...Page 36 Digium Inc Release 1 0 Chapter 3 Configuration...
Страница 42: ...Page 42 Digium Inc Release 1 0 Chapter 5 Troubleshooting...
Страница 48: ...Page 48 Digium Inc Release 1 0 Appendix A Pin Assignments...
Страница 58: ...Page 58 Digium Inc Release 1 0 Appendix C Asterisk Configuration Commands...
Страница 62: ...Page 62 Digium Inc Release 1 0 Appendix D Dial Plan Applications...
Страница 72: ...Page 72 Digium Inc Release 1 0 Appendix E Glossary and Acronyms...