User guide

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ital trunk module (DTM). The card is located in a provisional trunk slot of
the maintenance trunk module (MTM), the services trunk module (STM),
or the integrated services module (ISM). The card has its own DS30 link
and is connected to the network by means of a direct cable.
NT1X89 — The multi-protocol controller (MPC) card, located on the IOC
shelf, allows data communications between a DMS-100 switch and an
external computer (for example, between a central office [(CO)] billing
computer and a DMS-100 switch). The NT1X89 protocol software is
downloaded from the DMS-100 CPU. The NT1X89BB card can be used
for data communications that exceed 9600 bps.
NT2X05AC — The line module (LM) power pack with improved ground-
ing card provides a regulated 24-V dc power supply and operates as a ring-
ing generator in LMs and remote line modules (RLM) in DMS-100
equipment.
NT2X06 — A power converter (5V/40 A) card, located in the MTM and
RMM shelves, receives a nominal -48V input and converts it to a regulated
5-V output. The card monitors the output and shuts down the converter if
the output exceeds a recommended threshold. If the converter is used with
a frame supervisory panel (FSP), the shutdown continues until the RESET
button on the converter faceplate is pushed.
NT2X07
— A power converter (+5V/+12V 40 A) card, located in the
DCM and JNET shelves (NT0X48AG Frame, receives a nominal -48V
input and converts it to a regulated +5V/+12V output.
NT2X09
— The 5V 40Amp power converter produces five outputs (-5V,
-15V, +5V, +12V, and +24V dc). This pack is used in the TM, MTM,
DRAM, STM, and RMM modules.
NT2X21 — Terminal address interface and tone generator card is located
in the LM or RLM. The tone generator section contains the audible tones
encoded digitally in a ROM. Tones are applied as required via the
R-MUX, under control of the Signaling Processor.
NT2X22 — The connection memory and transmit multiplexer card is
located in the LM or RLM. In addition to the 20 terminal transmit
digroups, a maintenance input (looparound) from the Receive MUX, and
tone generator input, are also applied to the input of the Transmit MUX.
Four of these input signals are connected at any channel time, under Con-
nection Memory control, to four
“transmit” network digroups.
NT2X23 — The receive multiplexer card is located in the LM or RLM.
Under control of the Connection Memory, four of the “receive” network
digroup inputs are selected every channel time, and connected to four of
the 20 terminal receive digroups (TRD 0 through 19). The Receive MUX
has an additional maintenance digroup output which can be connected to
the Transmit MUX maintenance digroup input for looparound.
NT2X24
— The signalling processor (SP) card, located in the LM or RLM,
is the interface between the Master Processor and the control circuits in the
line side of the LM. Through the SP, the line circuits, ringing multiplexers,
programmable ringing generators and the activity circuit are controlled,
and their status is reported.
NT2X25
— The signalling processor interface provides an interface
between the Signaling Processor, the Receive & Transmit MUX and the
Connection Memory. Handles insertion and extraction of signalling infor-
mation into and from the terminal digroups.
NT2X26AA — Master processor for the LM is a microprocessor unit with
48 Kbytes of dynamic RAM and 2 Kbytes of EPROM.
NT2X26AB — Master processor for the RLM.
NT2X27AA–AF — Various ringing generators.
NT2X32 — This DCM processor card contains a microprocessor, up to 3K
of RAM, and a 2K PROM controls the operation of the circuit cards in the
DCM-B shelf by interpreting and acting on commands received from the
DMS control module (CM) and responding to line changes detected by the
supervision and signaling circuit cards. The processor, which communi-
cates with the other circuit cards in the control section over the processor
bus, includes interrupt capabilities and features single-line, per-card enable
signals. Parity over data is used for detecting memory faults.
NT2X33 — This card acts as a message processor card in the LM or as a
control card for DCMs. In the LM, it is the interface between the Master
Processor and the message channel to the CC. For the DCM, the control
circuit card contains ROM-controlled message-handling circuits that work
with the CM. It comprises a message buffer, reset-message detection-code
firmware, and a sanity timer that is responsible for DCM sanity. It also
includes a phase-locked loop (PLL) that extracts the 10.24-MHz clock sig-
nal from the network speech data. The NT2X33AE is used in ENET appli-
cations and is backward compatible with the NT2X33AB, which is used in
older J-Net applications.
NT2X34 — This card acts as a PP message processor in the LM and as a
supervision card in the DCM. For the LM, it does not communicate with
the CC, but with hierarchically equal units (i.e: the PP in other peripheral
modules). The LM PPMP communicates with the Master Processor
through a 1.5 Kbyte section of RAM, an interrupt line, and a first-in,
first-out (FIFO) memory which stores causes of interrupts. For the DCM,