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Glossary
AMI
BPV
Bridged tap
CD
Champ connector
CO
COM port
CP
CPE
CRC
CTS
CV
DCE
DSR
DSX-1
DTE
DTR
E1
ETSI
factory defaults
FAS
7915-A2-GB20-20
Alternate Mark Inversion coding format.
Bipolar Violation. A type of error detected by using a modified bipolar signaling method in
which a control code is inserted. Used with AMI coding format.
A section of cable that was used to provide phone service to a home or business that is
connected to a live copper wire but is not terminated.
Carrier Detect. A signal indicating that energy exists on the transmission circuit.
Associated with Pin 8 on an EIA-232 interface.
64-pin connector used to connect the E1/T1 network or local loop to the HotWire 7900
Nest connectors J5, J6, and J7.
Central Office.
Communications port. A computer's serial communications port used to transmit to and
receive data from a DCE. The DCE connects directly to this port.
Customer Premises.
Customer Premises Equipment. Terminating equipment supplied by either the customer or
some other supplier that is connected to the telecommunications network (e.g., DSUs,
terminals, phones, routers, modems).
Cyclic Redundancy Check. A commonly used method of error detection.
Clear to Send. An EIA-lead standard for V.24 circuit CT 106; an output signal
(DCE-to-DTE).
Code Violation. This is equivalent to a BPV. Used with HDB3 coding format.
Data Communications Equipment. The equipment that provides the functions required to
establish, maintain, and end a connection. It also provides the signal conversion required
for communication between the DTE and the network.
Data Set Ready. An EIA-lead standard for V.24 circuit CT 107; an output signal
(DCE-to-DTE).
Transmission standard at T1 speeds, 1.544 Mbps.
Data Terminal Equipment. The equipment, such as computers, printers, and routers, that
provide or create data.
Data Terminal Ready. An EIA-lead standard for V.24 circuit CT 108; an input signal
(DTE-to-DCE).
A data signaling rate common outside the United States. A wideband interface operating at
2.048 Mbps defined by CCITT standards G.703 and G.704.
European Telecommunications Standards Institute. A European standards body
established in 1988 by a decision of the CEPT (Conference of European Postal and
Telecommunications Administrations).
A predetermined set of configuration options for general operation.
Frame Alignment Signal. A loss of signal (LOS) error detection.
September 1997
GL-1
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