User`s guide

Glossary
GL-3
6700-A2-GY31-70
July 1999
Dial Backup Module. The optional internal ISDN BRI feature that provides automatic dial
backup and service restoration of failed digital circuits. Provides an ISDN U-interface.
Data Carrier Detect. A signal passed from a local modem to a local DTE when the modem
has received an acceptable carrier signal over the phone line (also known as RLSD,
received line carrier detect).
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.
Direct Distance Dialing. Telephone exchange service, the public switched telephone
network (PSTN) that enables a telephone service user to access telephone lines without
operator assistance.
Digital Data Service, such as DATAPHONE Digital Service or ACCUNET Spectrum of
Digital Services, that provides private digital communication circuits.
A factory-preset value that is assumed to be correct unless changed by the user.
A standalone or carrier-installed circuit card.
A condition indicating that the device has failed self-test or has detected an internal failure.
Service or replacement is required.
A user-defined category that identifies a set of devices.
A unique label (maximum 15 characters) that identifies the device. The device name must
be unique to all other network element names (sites, carriers, devices, device groups,
cabinets, and models).
A memory location in a device that stores device configuration option information.
A device operating on a Public Switched Telephone Network (PSTN) line and requiring a
dialing method and protocol to conduct data transmission.
One of a device’s operational states that indicates a dial/leased device is using a dial line
rather than a leased line to complete its communication.
A condition indicating that dial backup is active for the leased or Analog Private Line (APL)
devices.
One of a leased-line device’s operational states. The Dial Standby mode allows the device
to switch back to leased-line operation while still maintaining the dial line.
Dial tone test was enabled and test failed.
A local digital loopback test that connects the device’s receiver output back to the
transmitter input. This test disrupts the transmission of primary data.
The modem’s DTE (Data Terminal Equipment) port transmission has been disabled.
Allows device polling to be changed from continuous (over a fixed diagnostic connection)
to intermittent. A start poll interval and poll duration can be set via the 6700 NMS to control
how often and for how long devices are polled. Alarms will only be reported when the
distributive devices are being polled.
Data Set Ready. A signal from the modem to the DTE that indicates the modem is turned
ON and connected to the DTE.
Data Service Unit. Data communications equipment that provides timing, signal
regeneration, and an interface to data terminal equipment. A subrate DSU/CSU is normally
referred to as a DSU.
DBM
DCD
DCE
DDD
DDS
default
device
device failure
device group
device name
device options area
dial
dial backup
dial backup active for
APL
dial standby
dial tone
digital loopback test
disabled
distributive
diagnostics
DSR
DSU