Release 1.0
Digium, Inc.
Page 55
Appendix C 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.
FXS
Foreign Exchange Station
Initiates and sends ringing voltage.
G.711
The International Telecommunications Union recommendation for an
algorithm designed to transmit and receive mulaw PCM voice and A-law
at digital bit rate 64 Kbps. This algorithm is used for digital telephone sets
on digital PBX.