Paradyne Compshere 3000 Series, Installation Manual

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COMSPHERE 3000 Series Carrier
Glossary-2 July 1999 3000-A2-GA31-D0
Auxiliary Backplane An 8-slot backplane that fits over one half of the open section of the COMSPHERE
3000 Series Carrier. This is a passive assembly that provides interconnect capability
between T1 CSUs and T1 DSU/CSUs and provides all interface connectors.
AWG American Wire Gauge. An indication of wire size.
B-channel Bearer Channel. ISDN 64 kbps bearer channel used for voice, circuit, or packet switched
data.
backbone network The main circuit that carries the data before it is split into extended circuits going to their
final destination.
backplane A common bus at the rear of the COMSPHERE 3000 Series Carrier connecting each circuit
card slot to the SDCP and/or SDU. It also distributes low-voltage ac power to each slot.
bis Latin for “twice.” Used to distinguish the second version of a standard from other versions;
e.g., V.32bis.
BRI Basic Rate Interface. ISDN interface consisting of B-channel for information transfer and
D-channel for control and signaling.
bridge mode All ports are assigned to one digital-sharing group.
cabinet A structure that houses carriers (six maximum).
carrier The rack mounting that contains 17 slots: 1 SDU control slot and 16 device slots.
carrier-mounted A device that is designed for installation in a COMSPHERE 3000 Series Carrier and used at
central-site operations. Up to 16 devices can be installed per carrier, with six carriers per
cabinet.
CC Control Channel. The diagnostic interface between an NMS and a network device.
CCITT Consultative Committee on International Telegraphy and Telephony. An advisory committee
established by the United Nations to recommend communications standards and policies.
See ITU-TSS.
channel A bidirectional DS0, voice, or data path, for electrical transmission between two or more
points. Also called a circuit, line, link, path, or facility.
circuit A logical connection between 2 devices, either point-to-point or multipoint.
circuit pack lock A screw lock tab installed over a circuit card’s latch release tab to prevent the unit from
being removed without a tool.
COM port Communications port. A computer’s serial communications port used to transmit to and
receive data from a modem. The modem connects directly to this port.
COMSPHERE A proprietary product family and registered trademark.
connector An outlet on equipment and cables that provides a connection.
connector module An interface that is shipped with a modular DSU with TDM or MCMP and installed onto
the rear of the COMSPHERE 3000 Series Carrier. The module contains six EIA-232
connectors, one for each port. The module also has a 26-pin high-density D-type connector
located at the top of the module for V.35 operation on Port 1 or an aggregate data path.