User guide

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NT3X19 — This speech interface card, used in the NT0X48 Junctored
Network, contains decoders and buffers for the incoming circuits, and buff-
ers and encoders for the outgoing circuits. The decoders can accommodate
four 32-channel ports (0-3) of incoming serial PCM at 2.56Mb/s, therefore,
for the 64-port NM, 16 speech IF cards are required (designated IF-0
through IF-15).
NT3X20 — This MD’d test card, used in the NT0X48 J-Net, inserts &
detects test codes and provides an active bus termination.
NT3X21 — This MD’d bus card, used in the NT0X48 Junctored Network,
provides an interface/termination for cables from other shelves, and
regenerates clock and sync pulses and multiplexes data streams.
NT3X22AA/AB — This I/O card, used in the NT0X48 Junctored Net-
work, interfaces the transmission of signaling and control messages to and
from the CMC in the CCC or the MS in the DMS-SuperNode, and the two
processors in the NMC. The AA card is for the NT40 and the AB for the
SuperNode.
NT3X23AA/AD
— This MD’d processor card, used in the NT0X48 Junc-
tored Network, handles all messages from the CMC or the MS, and is
referred to as the C-side processor. The AA card is for the NT40 and the
AD for the SuperNode.
NT3X24 — This MD’d clock card, used in the NT0X48 Junctored Net-
work, provides timing & sync signals to the processor cards.
NT3X47 — The HDLC message processor, located in the RLM, is the
interface between the Master Processor and the message channel to the CC
in the host office. In addition, it handles the reception and transmission of
PP to PP messages between the RLM and other connected PM via the host
office DCM-R. These tasks are performed by a processor section and a
controller (HDLC) section. Also included are timing and control circuits
which provide synchronization between the RLM circuits (2.56 MHz) and
the clock signal extracted from the DS1 links (1.544 MHz).
NT3X48 — The DS1 interface card is located in the RLM. One or two
cards, depending on the number of DS1 or MRLM links required (2 links
per card). Each card provides two ports to the DS1 or MRLM links.
NT3X49 — This is an optional extension memory card for the RLM. It
provides extra memory capability for the Master Processor when the ESA
option is in use.
NT3X70 — This crosspoint card, used in the NT5X13 Junctored Network,
contains the TS for 512 channels (one quarter) of one side of an NM.
Speech data enters the XPT card in parallel format on a 10-bit wide bus car-
rying 512 channels. Since the format is parallel, the ports are separated in
time, not in space. The data on this bus is written into the DM of the
first-stage TS. The data in the DM is subsequently distributed to its own
second-stage TS and to those on its three mate XPT cards through the inter-
switch link buses.
NT3X71 — This test code card, used in the NT5X13 Junctored Network,
interfaces with a network control processor card (NT3X74) to allow the
insertion and extraction of test code (TC).
NT3X72
— This speech interface card, used in the NT5X13 Junctored
Network, provides eight bi-directional, 2.56 Mb/s serial port interfaces on
shelf 18. Each card interface contains decoders and data alignment buffers
for the incoming circuits, and encoders and buffers for the outgoing cir-
cuits.
NT3X73
— This serial-to-parallel (SP) formatter card, used in the
NT5X13 Junctored Network, converts the incoming serial data received
from the speech interface cards to the parallel format required for the cros-
spoint cards. The SP formatter consists of four identical sections. Each
section is responsible for converting 16 ports (8 pairs) of speech data into a
512-channel, 10-bit parallel bus. Thirty-two (4 sections X 8 pairs) dual-port
(1-pair) serial data buses from eight serial interface cards are received by
the four SP formatter sections. It outputs four 10-bit parallel buses, one to
each of the four crosspoint cards which comprise one side of an NM.
NT3X74AB — This SuperNode network control processor card, used in
the NT5X13 Junctored Network, handles message transfer between the CC
and PM.
NT3X75AA and AB — This P-side processor card, used in the NT5X13
Junctored Network, handles message transfer between NM and PM via SP
and PS formatters.
NT3X75BA and BB — This P-side processor card, used in the NT8X10
Junctored Network, handles message transfer between NM and PM via SP
and PS formatters.
NT3X76AC — This SuperNode network clock card, used in the NT5X13
Junctored Network, interfaces the transmission of signaling and control
messages to and from the computing module in the DMS-SuperNode, and
the two processors in the NMC. It also generates a 10.24 Mhz clock pulse
and a frame pulse (125us). The clock circuit periodically synchronizes
itself with the frame pulse received from the incoming data from the com-
puting module. These clock and frame pulses control timing within the NM
and, through the interface cards, to the PM.
NT3X86 — This parallel-to-serial (PS) card, used in the NT5X13 Junc-
tored Network, converts parallel speech buses from the XPT cards to the