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+12 VDC
12 volt direct current.
120 vac
120 volt alternating current (North American standard electrical supply).
A
ADPCM
Adaptive Differential Pulse Code Modulation. A reduced bit rate variant of PCM (Pulse Code Modulation) audio
encoding.
ARP
Address Resolution Protocol.
ATM
Asynchronous Transfer Mode. A high bandwidth, low-delay, connection-orientated, packet-like Gatewaying and
multiplexing technique.
B
Bandwidth
The width of a communications channel. Measured in bits per second (bps).
Baud Rate
The speed in Kbps at which digital data can be transmitted.
Broadcast Address
This is the address that sends IP packets to all devices on the same Network Number.
C
CSMA/CD
Carrier Sense Multiple Access / Collision Detection. Protocol for Ethernet transmission.
PBXgateway II System Administrator's Guide
Glossary
163
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