GL-1
7914-A2-GB20-00
February 1998
Glossary
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.
Bipolar with eights and Zeroes Substitution. An encoding scheme for transmitting clear
channel signals over a T1 line.
Carrier Detect. A signal indicating that energy exists on the transmission circuit.
Associated with Pin 8 on an EIA-232 interface.
Central Office. As used in this manual, CO denotes any central site as distinguished from
the Customer Premises site.
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.
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. A signal from the modem to the DTE that indicates the modem is turned
ON and connected to the DTE.
Digital Signal cross-connection (of network equipment) at T1 rates.
Digital Signal level 1. A framing specification for T1 circuits.
Data Terminal Equipment. The equipment, such as computers and printers, that provides
or creates data.
Data Terminal Ready. A signal from the DTE to the modem, sent via Pin 20 of the
EIA-232 interface (V.24 circuit 108/1, /2), that indicates the DTE is turned ON and
connected to the modem.
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.
A predetermined set of configuration options for general operation.
Frame Alignment Signal . A loss of signal (LOS) error detection.
Frame Alignment Word. A loss of synchronization error detection.
AMI
BPV
B8ZS
CD
CO
COM port
CP
CPE
CRC
CTS
CV
DCE
DSR
DSX-1
DS1
DTE
DTR
E1
factory defaults
FAS
FAW
