GTE Omni Si Database Technical Practices Issue 1 Manual

							SVR 5210TL-130500-1001
List of Cards9.10 Tables 9.2 and 9.3 provide an alphabetical and a numerical
list of the cards used in the 
OMNI SI PABX for both voice and
data.NOTE: The FB mnemonic, which is placed in front of each card
number, stands for functional board.
The following list, provided for your reference, gives of all the
cards in a 
OMNI SI PABX. Figure 9.8 shows the system data
connections.
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							TL-130500-1001ATT1 2BCSR
rCHM85CIP/  
CP85E
DVCIP
FDCFMSD
INCKS
INCKLCM
MPB85
MPG16
/  PCMFS
I
/  PCMTS
- FB-20974-APCM Tone Source Card (Note 1)
PCONF
FB-51279-APCM Conference Card
PCOTFB-17202-A or BOAPCM Central Office Trunk (Note 2)
PDTMF
FB-17203-APCM Dual Tone Multi-frequency
PEMT
FB-17201 -APCM Two-Wire E&M Trunk (Note 2)
PFT
FB-51051 -APower Fail Transfer Card
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Table 9.2Alphabetical List sf Printed Circuit Boards 
						

							TL-130500-1001Table 9.2Alphabetical List of Printed Circuit Boards (Continued)
Tl B2FB-17192-ATl Buffer Circuit 2
TlSFB-20718-l ASupervisory Alarm Circuit for Tl
UCB/DCPFB-17231 -AUniversal Controller Board
VCIPFB-17235-AVoice Control Interface Processor
PILTFB-51280-A or BOAPCM Incoming Loop Trunk DID (Note 2)
VPLCFB-17226-AVoice Packet Line Card
VPLCDFB-17226-l AVoice Packet Line Card Derived
VPLC2FB-17246-AVoice Packet Line Card 2i
NOTES:
1. These cards cannot be removed or replaced without removing power from the cabinet in
which the card is located. (Refer to power-down procedures.)
2. These cards cannot be removed without first placing the card position in the maintenance
busy state. (Refer to power-down procedures.)
3.Disconnect the cables from the front of these cards before removing or replacing them.
SW 52108187S-l 45 
						

							TL-130500-1001Table 9.3Numerical List of Printed Circuit Boards
CARD NUMBERMNEMONICDESCRIPTION
IFB-15277-l A
FB-15278-ASILFDCSpan Interface and Output Format for TlFrame Detector Circuit for 
TlFB-15280-ALCM
FB-17187-A
PCMIFB-17188-A
TPl2FB-17189-A or BOA
PCMFS
FB-17192-A
Tl B2
FB-17201 -APEMT
FB-17202-A or BOA
PCOT
FB-17203-APDTMF
FB-17208-A
ATT12FB-17209-A
SIDML
FB-1721 O-APADIC
FB-17213-BOAMPG16
FB-17215-A
MPB85
FB-17217-AEPCMN
FB-17218-A
CHM85
FB-17220-BOAFMSD
FB-17225-A
CIPFB-17226-A
VPLC
FB-17226-1AVPLCD
/  FB-17227-A
PBE/T!  
FB-17228-BOAPR1  FB-17229-AADM P-A
’  
FB-17230-BOAADM P-C
FB-17231 -AUCB
FB-17235-A
VCIPi  FB-17236-A
DVCIPFB-17242-A
NIC
FB-17246-A
VPLC2Line Compensator for 
TlPCM Interface
Test Panel Interface Version 2 (Notes 1 and 3)
PCM Frame Synchronization
Tl Buffer Circuit 2
PCM Two-Wire E&M Trunk (Note 2)
PCM Central Office Trunk (Note 2)
PCM Dual Tone Multi-frequency
Attendant Interface Number 2 (Note 2)
SI Dual Modem and Current Loop (Note 2)
Public Address and Dictation
Memory Paging 16 Page (Note 1
Multi-Processor Buffer 8085 (Notes 1 and 3)
-Network (Notes 1 and 3)
Channel Memory 8085 (Notes 1 and 3)
File Management System Data Card (Notes 1, 2, 
& 3)
Control Interface to Periphery (Note 2)
Voice Packet Line Card
Voice Packet Line Card Derived
Packet Bus Extender/Terminator (Note 3)
Packet Router (Note 3)
Administrative and Maintenance Processor (Note 3)
Administrative and Maintenance Processor (Note 3)
Universal Controller Board
Voice Control Interface Processor (Notes 1 and 2)
Data Voice Control Interface Processor (Notes 1 
& 2)
Network Interface Card
Voice Packet Line Card 2
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							TL-130500-1001Table 9.3Numerical List of Printed Circuit Boards (Continued)
NOTES:1. These cards cannot be removed or replaced without removing power from the cabinet in
which the card is located. (Refer to power-down procedures.)
2. These cards cannot be removed without first placing the card position in the maintenance
busy state. (Refer to power-down procedures.)
3.Disconnect the cables from the front of these cards before removing or replacing them.
SVR 5210
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							0
m, 
						

							TL-130500-1001VOICE10.0 The system supports a maximum of 256 lines or 64 trunks.
EQUIPMENT/TRAFFICIf optional features are used, this number is reduced.
ENGINEERINGThis section discusses:
0 The impact of line traffic on the system
* The impact of trunk traffic on the system
l The impact of features on the system
Voice Transportation10.1 Time slots transport analog (voice and tone)
Inside the PABXsignals inside the digital environment of the switch (Figure 10.1).
SW 5210voltage
voltageanalog
time
1011001
mdigital
time
Figure 10.1Analog and Digital
SignalsEach call requires a time slot. Lines, trunks, and certain features
share time slots.
NOTE: Cards that transport voice or tone use time slots, as well
as NIC and 
DVCIP cards that use time slots for data transport.
Data link cards such as the 
ATTl2, CIP, and SIDML do not use
time slots.
Time slots are assigned on demand by use of time-division
multiplexing techniques. These techniques let different users
access the same physical channel for short periods of time, thus
accommodating all of the allowed users.
The PCM (Pulse Code Modulation) low-level bus allocates use
of the time slots (Figure 10.2).
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21
i1
II
Level IBFigure 10.2PCM (Pulse Code Modulation) Low-usThe use of time slots permits the system to coordinate the
placement of a phone call:
0 When a call originates, the system assigns a series of memory
locations to the originator within 10 milliseconds after the
phone is taken off-hook. This is called assigning a time slot.
0 The time slot permits access to the signaling tones and timing
sequences needed to complete a connection. The access
allowed depends upon the signaling mode used when dialing,
and on the feature used.
0 If a connection is completed, the system assigns an additional
set of memory locations (time slots) to carry return information
to the originator. (Two time slots are needed for a two-way
conversation.)
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							TL-I 30500-l 001
Time Switching10.2 Each group within the system has access to certain time
GKlUpSslots (Figure 10.3).
0 System hardware is divided into six time switching groups:
- Each group has twenty-four time slots.
- The Get Started File has two time switching groups that
correspond with groups A and S.
- The Expansion File has four time switching groups - two
are located in group C and two are located in group D.
0 The Get Started File has a total of 48 time slots.
(8, The Expansion File has a total of 96 time slots.
0 The system has a total of 444 time slots. Each party in a
conversation needs a time slot. The system can handle 72
simultaneous conversations if no features requiring dedicated
time slots are used.
I
FILE A- PCMUS GROUP
48 TIMESI-0TS -
2-
d
3
TKeSlots
FieTotal
f144Time
Slots=
SystemTotal
4
T:r%Slots=
FlkTotal 1  FILE 
B+ COMMON CONTROLPCMUS GROUP A
24 TIME SLOTS -PCMUS GROUP++.-.-- 24 TIME SLOTSB_-2 2
:, 0 1
~a 3 a
: 45TimeSwitching Groups
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							TL-130500-1001Group Usage of10.2.1 The OMNI SI software makes extensive use of the time
Time Switchingswitching group division. One such use permits the system to
coordinate the placement of a phone call:
l When a call originates, the system assigns a series of memory
locations to the originator within 10 milliseconds after the
phone is taken off-hook. This is referred to as assigning a
time slot.
l Depending upon the signaling mode used when dialing, and on
the feature invoked by the phone user, the time slot permits
access of the signaling tones and timing sequences needed to
complete a connection.
* If a connection is completed, the system assigns an additional
set of memory locations (time slots) to carry return information
to the originator.
Blockage of10.3 The line and trunk cards physically located in a time
Time Switchingswitching group have access to the time slots associated with
that group only.
l If all the time slots in a group are busy, and a line or trunk
circuit attempts to access a time slot, the attempt will be
blocked.
0 If a phone user attempts a call when all the time slots
associated with the group 
are”busy, the dial tone will be
delayed until a time slot becomes available.
Types of10.3.1 An originating call can encounter two types of traffic
Blockageblocking congestion:
* Networking Blocking
- Due to internal blocking of the network. the system is unable
to send dial tone to the originating party at the time slot
group level of the originator
Xre to blocking of the network. the system is unable to
onnect ring or voice to the called party at the time slot
group level of the called party.
This type of blocking happens when the number of concurrent
originations 
and/or term/nations is greater than the number of
channels (time slots) available in the PCMUS group.
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