Polycom ViewStation Manuale Utente Scaricare il pdf (Pagina 231)

Glossary

ABC

Annex D The second frame relay standard extension

dealing with the communication and

signaling between customer-premises

equipment and frame-relay-network

equipment for the purpose of querying

network status information.

ATT 4ESS AT&T’s large toll telephone switch. It will

handle 100,000 trunks and over 500,000

attempts at making a call each hour.

ATT 5ESS AT&T Class 5 digital central office.

ADSL Asymmetrical Digital Subscriber Line. A

communications technology used to transmit

digital data over telephone wires. It is

expected to transmit up to six megabits per

second and be used for video-on-demand

services to telephone company customers.

Analog Line A telephone line that transmits and receives

signals in variable, continuous waveforms

that are generated by telephones, fax

machines, models, etc. The signal

transmitted is a true electrical representation

of the original source audio, as opposed to a

coded digital signal that must be decoded at

the far end.

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Polycom ViewStation Manuale Utente Pagina 231