Installation manual

Glossary
Glossary-73000-A2-GA31-F0 March 2001
Network Controller An NMS that uses the DATAPHONE II protocol.
Network Interface The digital network vendor’s termination device (modular jack, terminal block, etc).
NIM Network Interface Module. The interface provided, up to two per carrier, for the PSTN.
NMS Network Management System. A computer system used for monitoring and controlling
network devices.
non-modular circuit card A carrier-mounted circuit card with connectors mounted onto the card. This circuit card type
requires that the DTE cables be disconnected before the circuit card is removed from the
carrier.
permissive interface A dial modem operating mode characterized by a fixed output power level of –9 dBm.
physical address The diagnostic address of a control DSU or modem derived from its location in the carrier:
its carrier and slot number.
point-to-point circuit A data network circuit with one control and one tributary device.
power transformer unit Provides low voltage ac power to the COMSPHERE 3000 Series Carrier; internal power
distribution bus.
primary core The circuit card that is normally running when power is supplied to the unit. In the case of a
DBM-D, DBM-I, DBM-S, or DBM-V, the primary core and the active core are the same.
programmable interface A dial modem operating mode characterized by an output power level (–12 to 0 dBm) set by
a programming resistor in the datajack. It is one of two possible modes of operation for
DSUs or modems connected to dial lines.
protocol The rules for timing, format, error control, and flow control during data transmission.
PSTN Public Switched Telephone Network. A network shared among many users who can use
telephones to establish connections between two points.
punchdown block Used for hardwiring cable circuits of a network interface.
rear connector plate Used with modular devices, a connector plate is installed onto the rear of the COMSPHERE
3000 Series Carrier. It contains two DTE connectors and functions as an interface between
the modular device and the DTE.
REN Ringer Equivalence Number. Number of wires that can be connected to a telephone line.
RJ11C A type of 6-position jack normally used with permissive dial networks and telephone sets.
RJ45 A type of 8-position jack normally used with programmable dial networks.
RMA Return Material Authorization. Provided by customer assistance center for equipment return.
RS-232-D An Electronic Industries Association’s standard defining the 25-position interface between
data terminal equipment and data communications equipment.
RS-449 An EIA standard for a general-purpose, 37-position, DCE/DTE interface.