DEFINITIONS

2-WIRE

4-WIRE

ASYMMETRIC DIGITAL SUBSCRIBER LINE, 8 MBIT/S DOWN, 1.0 MBIT/S UP

ASYMMETRIC DIGITAL SUBSCRIBER LINE, 24 MBIT/S DOWN, 1.0 MBIT/S UP

CENTRAL OFFICE

DIGITAL SIGNAL 1 (=T1), 24 DS0 CHANNELS

DIGITAL SUBSCRIBER LINE

HIGH BIT RATE DIGITAL SUBSCRIBER LINE (4-WIRE)

HIGH BIT RATE DIGITAL SUBSCRIBER LINE 2 (2-WIRE)

HIGH BIT RATE DIGITAL SUBSCRIBER LINE 4 (4-WIRE)

INVERSE MULTIPLEXING OVER ATM

MAGNETO OPTICAL DISK DEVICE

MULTIPLEXER

OPTICAL CARRIER LEVEL 3 UP TO 155MBIT/S, SONET EQUIVALENT TO SDH STM-1

CONCATENATES (12) STS1/OC1 FRAMES INTO (1) OC-12 LOOK ALIKE STREAM

OPTICAL CARRIER LEVEL 3 UP TO 155MBIT/S, SONET EQUIVALENT TO SDH STM-1

CONCATENATES (3) STS1/OC1 FRAMES INTO (1) OC-3 LOOK ALIKE STREAM

8-PORT

PLAIN OLD TELEPHONE SERVICE

4-PORT

SYSTEM CONTROL UNIT

SMALL FORM-FACTOR PLUGGABLE GBIC, A HOT-PLUGGABLE OPTICAL TRANSCEIVER FOR SONET & ETHERNET

SYNCHRONOUS TRANSPORT SIGNAL LEVEL-1 = 1 DS3 CHANNEL

SYNCHRONOUS TRANSPORT SIGNAL LEVEL-1 = 1 DS3 CHANNEL

SECURE WEB GATEWAY

DIGITAL SIGNAL 1 (DS1, ALSO CALLED T1) IS A T-CARRIER SIGNAL DEVISED BY BELL LABS

TOTAL ACCESS 3000

TRANSMITTER / RECEIVER