Digium TE820 User Manual download pdf (Page 69)

Appendix C Glossary and Acronyms

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 FXO ports.

FXS Foreign Exchange Station

Initiates and sends ringing voltage. Phones are connected to FXS ports.

G.711

A recommendation by the Telecommunication Standardization Sector

(ITU-T) for an algorithm designed to transmit and receive mulaw PCM

voice and A-law at a digital bit rate of 64 kbps.

G.723.1

A recommendation by the Telecommunication Standardization Sector

(ITU-T) for an algorithm designed to transmit and receive audio at 6.3

kbps or 5.3 kbps.

G.729a

A recommendation by the Telecommunication Standardization Sector

(ITU-T) for an algorithm designed to transmit and receive audio at 8

kbps.

H.323

A recommendation by the Telecommunication Standardization Sector

(ITU-T) for multimedia communications over packet-based networks.

Digium, Inc. Page 69

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Digium TE820 User Manual Page 69