GTE Omni Si Database Technical Practices Issue 1 Manual

							Backplane
Assemblies
Get Started
BackplaneAssembly
Expansion BackplaneAssembly
Power BackplaneAssembly
Message Exchange
SW 5210TL-130500-1001
2.3.4 The equipment cabinet contains the backplane
assemblies for the Get Started, Expansion, and Power Monitor
Transfer Files.
Get Started backplane assembly supports the common control
circuits and time-switch network for all the lines, trunks, and
features used in the system.It also supports a limited number of
lines, trunks, and data ports. The wire wrapped backplane is
installed as the Y file in the cabinet and allows file equipment
communications in the Y file.
The Expansion File wire wrapped backplane is installed as the X
file in the cabinet. This allows file equipment communications in
the X file.
The power backplane assembly contains circuitry for monitoring
power supplies of equipment files, system status 
LEDs; and
alarm signals.
Communications between the files is provided for by an inter-file
cable connection.
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PRINTED CIRCUIT3.0 This section describes card slot locations and functions
BOARDS (VOICE)for system voice applications. It also provides the mnemonic,
part number, type, and general function of the cards that can be
installed in the system.0 Common control cards
l Tl-Span cards (digital trunks)
l Universal cards (trunks, lines and features)
l Power cards
Card Slot3.1 The equipment cabinet configuration provides for two
Locationsequipment files. The Get Started File is located in file position Y.
The Expansion File is located in file position X near the top of the
cabinet. The X and Y files together are called a PEC (Peripheral
Equipment Complex). In the 
OMNI SI, this PEC is always called
PEC 0. The common control equipment occupies the first 17
card slots of the Get Started File. The line and trunk interface
cards occupy the last 19 card slots of the Get Started File and
most of the card slots in the Expansion File.
Most of the equipment installed into the equipment files consists
of plug-in 
PCBs (Printed Circuit Boards) which are front-mounted into the card slots. An exception is the FB-20996-A
Recorder Announcer 
Buildout Resistor (RABR) card, which
mounts on the rear of the power transfer backplane assembly.
The width of the cards may require allocation of more than one
card slot area for installing some cards. A card may occupy one
or two card slot areas (the 
AIOD card needs three slots).
Card slot locations (Figure 3.1) are broken down as follows:
l The physical card slots within the Get Started and Expansion
Files are identified by the numbers at the bottom of the files
(01-36).l The Get Started File (Y) is divided into software groups A and
B.l The Expansion File (X) is designed into software card groups,
C and D.
l The hardware and 
software card slot designations are located
at the bottom of the card slot and represent the slot number
within the group (O-11).
l Card slots 01 through 17 of the Get Started File (file Y) and 01
through 08 of the Expansion File (file X) are reserved for
common control cards.
o Card slots 09 through 19 of the Expansion File (file A or X) are
reserved for 
Tl-span (digital trunk) cards.
- Tl-span cards are double width, and the slots provided for
them are designed to accommodate double width cards.
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UIVERSALCARD SLOTS COMMON CONTROL
CARD SLOTS
GROUP 
cGROUP 0
d
5I  1 
1 12 3 4
~
iI 4 124
7;1
I
1
:
c
:
33
:I
=-
UIVERSALCARD SLOTS
COMMON CONTROLCARD SLOTS
GROUP AGROUP 6
~
. .
t
-I--I
1
I
i-i
tI
-Figure 3.1
- if a TI-span is not needed, then trunk, line, or feature cards
can go here. it is recommended to put double width cards
here.
@ Card slots 18 through 36 of the Get Started File (file Y) and 09
through 36 of the Expansion File (file 
Xj are reserved for trunk,
line, or station cards. Slot 
27 in the Get Started File (Y) is not
available for use.
@ Card slot A0 of the Get Started File (fi!e Y) can only be used by
a conference card or a 
dual tone multi-frequency card; this is
because of the backplane configuration.
PKTE: if the PD-200 data option is equipped. card slot A0 can
house a data card used to extend or terminate an LPB (Local
Packet Bus).
S-36
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PCMUSS3.2 (Figure 3.2) Circuits that provide connections to lines
(Pulse Codeare housed on line cards (eight line circuits per card) and
Modulationcircuits that provide connections to trunks are housed on trunk
Universal Slots)cards (four trunk circuits per card). Line cards provide
connectivity between peripheral devices and the system. Trunk
cards provide connectivity between the system and the 
Telco.Feature cards provide special capabilities to the system e. g.,
DTMF to rotary dial conversion, paging, connection to a music
source, etc. The system has 40 card slots that can support line,
trunk, or feature cards (data cards will be discussed separately).
These card slots are referred to as PCMUSs. The 40 PCMUSs
in the system are divided into six PCMUS groups. The physical
relationships of the files, the PCMUS groups, and the card slots
are shown in Figure 3.4.
NOTES:
0 Card slot A0 is not counted in the 40 PCMUS total.
l Slot 
A0 is reserved for certain cards; including this slot
provides a total of 41 PCMUSs.
Several types of 
PCBs can be installed in a PCMUS. Each
occupies one or two card slots. The number of line, trunk, or
feature cards that can be mounted in a given PCMUS group is
physically limited by the number of slots in that group and the
number of slots that a given card occupies.
This paragragph provides the part number, mnemonic, name,
function, and location of the 
PCBs that are installed within the
PABX.
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							TL-130300-1001EXPAN-
SION 
FI1.EX
GET
STARTED
FILE 
Y
FlgUre 3.2FrameImage CardLocations for aFully ConfiguredSystem
D-388.875210 
						

							TL-130500-1001Pulse Code3.3 The PCMUSs of the system are divided into groups. The
ModulationGet Started File accommodates two groups, groups A and 
8.Slot GroupsThe Expansion File differs in that its two groups, C and D, are
each subdivided into two groups. Card slots Cl through C6 and
C7 through Cl 1 are the subgroups of C group. Card slots DO
through 
05 and D6 through Dll are the subgroups of D group
(see Figure 3.3).
I
I-PCMUS GROUP C-Ic
,
4
;1
-2
4
-
5
I-
GROUPIFILE AI-‘UP 4 -.
b
c1
-
!i-
a
2
-
-
d0d
5
EXPFAICI~‘oNixi
ST@
vi
*GROUP 6 -++-- GRC+UP,+--- CONTROL FPCMUS GROUP DFILE 
0
I/c-----COMMON CONTROL-If- PCM;U&$O~P AfPCMUS GROUP BSROUP 1jFigure 
3 3Pulse Code Modulation Group Division
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Common ControlPrinted Circuit Boards3.4 This paragraph describes the 
PCBs that are installed within
the common control portion of the files. Common control cards
are responsible for call control and call processing. Information
concerning whether the PCB is needed to support a system
option or a capability requirement is also included. Figure 3.4
shows the dedicated card slots used for common control. Table
3.1 lists the FB (Functional Board) number, mnemonic, PCMUS
card function, and slot location of the common control cards.
-7
PCMUS GROUP C
EXPFAlC12’oNwI
II-PCMUS GROUP CFILE 
I3
Figure 3.4Common Control Card Slots
s-40
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Table 3.1Common Control CardsFB#MNE-MONICPCMUS CARD FUNCTIONSLOT LOCATION
FB-17218
FB-17314
FB-17213-80
FB-17224
FB-17288
FB-17215
FB-20992
FB-17220-BO
FB-17188
FB-17217
FB-20922 or
FB-20771-l
FB-17189
FB-17187
FB-20974CHM85 Channel Memory-8085
X/O1 and Y/15
MlMB1 Meg X 8 Bit Memory CardY/O1
MPG1 6Memory Paging- 3085
Y/O2
IFCONInterfile ConnectorXi03 and Y/O3
CP85ECentral Processor Unit-8085 EnhancedY!O4MPB85Multiprocessor Buffer-8085
Xi04 and Y;O5NSDCNarrow Serial Device ControllerYi06
FMSDFile Management System
Y/O7
TP12Test Panel Interface-Version 2
YlO8EPCMN Expanded PCM Network
Y/O9
INCKNetwork ClockY/l1PCMFS PCM Frame Synchronization
X/05, X/O6 & X/l 6
PCMIPCM InterfaceX07, Xi08 & Y/l 7
PCMTSPulse Code Modulation Tone Source
Yll3CHM853.4.1 Each file in the system requires a CHM85 (Channel
FB-17218-A
Memory) card. Channel memory holds the identity of the
equipment interface cards and the circuit on each card being
used in a call.
SVR 5210Each CHM85 card contains a RAM which stores the hardware
IDS of the line, trunk, and feature circuitry that have been
assigned channels within the system. Ninety-six time slots (four
24-channel groups) are available per CHM85 card:
e The CHM85 card stores hardware IDS. Slot X/O1 is for PCM
groups 4, 5, 6 and 7; 96 time slots are stored in this card.
l Slot Y/l 5 is for PCM groups 0 and 1; 48 time slots are stored
in this card.
When time slots are assigned to the interfaces, the channel
memory controls the time slot related sampling signals to the
interface cards. Channel memory is addressed via the CPU
address bus. Intercard communications data is transferred
between the channel memory and the CPU via the CPU data
bus.
Each CHM85 card functions as a PCM (Pulse Code Modulation)
highway between its PCM groups and the PCM time-switch
network EPCMN (Expanded PCM Network) card for data transfer.
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rnEmc.J@-v Cf+RSMlM03.4.2 The CPU 1 Meg x 8 bit Memory card provides
FB-17314-Aby 8 bits of system RAM. It is accessed by the CP85EThe system generic and data base software
are loaded onto this card during system initialization. The
software is stored within sixteen 64K pages
via the MPG16 (paging
card) and the address/control buses that originate at the
microprocessor. Data transfers are made across the 8-bit data
out/data in buses within the microprocessor complex. Data
transfer between the CPU and the Ml MB is routed via the MPG
16.
MPG163.4.3 The Memory Paging card performs the following
FB-17213-BOA functions:
@ Buffers data, address, read, write, strobe, and memory
reference signals between the CPU and the 
Ml MB.
0 Buffers the address, control and data out buses between the
CP85E and the M’lMB memory.
@ Refreshes the CPU RAM.
* Refreshes Ml MB memory.
0 Increases the addressable memory space from 64K to 1 Meg.
This is done by using a paging method, based on processor
instruction analysis, to select one of 16 physical pages (of 64K
bytes) fcr processor access.
@ Performs memory paging of up to Ii pages within the MlMBmemory (1 page = 64K 
x 8 bits).
@ Permits direct memory access by peripherals (Type 200 Test
Set).
IFCON3.4.4 The Interfile Connector card is required only when the
FB-17224-AExpansion File is installed in the field. It provides a 
circuit-to-circuit connection and interfaces the microprocessor buses
between the Get Started and Expansion File backplanes.
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