User guide

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serial format required by the serial port IF cards. The PS formatter consists
of four identical sections. Each section is responsible for converting a
512-channel 10-bit parallel bus into sixteen (8-pairs) serial buses. Four
parallel buses are received by the PS formatter, one from each of the four
XPT cards which comprise one side of an NM. It outputs thirty-two (4 sec-
tions x 8 pairs) dual port (1-pair) serial data buses to eight serial IF cards.
NT4X65 — The trunk module (TM) combination control card combines
the functions of the NT0X70 Processor Card, the NT2X45 Interface Card,
and the NT2X53 Control Card. It is used in the TM, MTM, and the STM.
It provides the high level control within the module. It controls signaling
and supervision functions, network messaging to the host DMS, and pro-
cessing of PCM data. This control card is an interface to analog and digital
test trunks, service circuits, and alarm circuits.
NT4X97 & NT4X98 — The NT4X98 metallic test unit (MTU) is a micro-
processor-controlled test unit that is used for line card testing and sub-
scriber loop diagnostics. The MTU consists of two cards: the NT4X97
MTU controller card, and the NT4X98AA MTU analog card. The
NT4X98AA contains the measurement test head, and is directly controlled
by the NT4X97 by way of a dedicated 22 conductor bus (MTU bus).
NT6X05 — The NT6X05 Line Drawer provides signalling and voice inter-
faces between 64 two-wire line cards and the two LCA control complexes.
It also controls the application of ringing. Each drawer contains a bus
interface card (BIC). NT6X05EA is Line Drawer for 1-Meg Modem LCs.
NT6X27 — The PCM30 interface card provides an interface between an
NT6X02 common peripheral controller (CPC) and European-standard
PCM30 trunk transmission equipment. The PCM30 interface card trans-
lates PCM voice signals and signaling data between two 32-channel,
2.048-Mbps external PCM 30 trunk circuits and one 64-channel,
5.12-Mbps duplicated port in the CPC.
Note: For further information on the following NT6X40 card link and port
assignments, see the “XPM PACK RELATIONSHIP DIAGRAM” and the
“XPM LINK CONFIGURATION DIAGRAM” within this QRG.
NT6X40
(see previous note) — The DS30 network interface (NI) card,
found in the DTC, LGC, LTC, SMA, SMU, SMR, LTCI/DTCI, TMS, and
RCC shelves, is available in two versions: the NT6X40AB (NT6X40AA is
MD’d) eight port card and the NT6X40AC 16 port card. The card provides
a central-side (C-side) interface for DS30 links to the network. Each port
of a DS30 NI card provides a two-way voice and data interface and con-
tains a looparound circuit for fault isolation.
Note:
If equipped with
SLC-96 6X85AA CPs, replacethe 6X40AA/AB/AC with a 6X40BA in slot
22. If equipped with SLC-966X85AB CPs, then 6X40AA/AB/AC packs
can be left in.
NT6X40BA — This DS30 network interface (NI) card, found in the C-side
of the subscriber carrier module SLC-96 (SMS). The NT6X40BA pro-
vides four DS30 ports instead of the 16 provided by two NT6X40AB cards
or 16 by one NT6X40AC card.
NT6X40FA & FB — Extended network (ENET) XPM DS512 link control
card (one per unit/plane).
NT6X40GA — DS-512 link paddle board card connects 512 pulse code
modulation circuits to ENET by means of a fiber optic cable.
NT6X41 — The speech bus formatter card, found in the DTC, LGC, LTC,
SMA, SMU, SMR, LTCI/DTCI, TMS, and RCC shelves, consists of two
sections: the clock section and the formatting section. The clock section
generates the 10.24-MHz shelf clock. The formatting section of the card
provides parallel-to-serial conversion of the encoded voice signals received
from the CSM interface card and destined for the C-side links. It also pro-
vides serial-to-parallel conversion of the encoded voice signals received
from the C-side interface cards, network plane selection, parity error gen-
eration for test purposes, and T1 clock generation.
The NT6X41AB version is for use in Turkey.
NT6X42 — The CSM card, found in the DTC, LGC, LTC, SMA, SMU,
SMR, LTCI/DTCI, TMS, and RCC shelves, performs several functions. It
extracts the CSM bit from the C-side channels, assembles the CSM for
each channel, and inserts the CSM into the outgoing C-side bytes. The
CSM CP also performs parity checking on all incoming bytes, as well as
parity generation on all outgoing bytes.
NT6X43 — The messaging interface card, an older messaging card found
in the SMA, SMR, SMU, LTCI/DTCI, TMS, and RCC shelves, provides
interface for the parallel speech bus and extracts control messages received
on channel zero from the control module (CM).
NT6X44 — The time switch TS, found in the DTC, LGC, LTC, SMA,
SMU, SMR, LTCI/DTCI, TMS, and RCC shelves, card converts between
the serial stream that is received from (or transmitted to) the DS30 interface
card or DS1 interface card and the parallel stream that is used on the inter-
nal speech bus. When controlled by the SP, the TS also associates any of
the DS30 interface cards and DS1 interface cards with any of the time slots
on the parallel speech bus and transfers data between the associated chan-
nel and the time slot. NA6X44AA not acceptable for PCL loads. See the
NTAX78 ETS card used for ISDN PRI and Digital Test Access.
NT6X44EA — The universal time switch card provides pulse code modu-