GTE Omni Si Database Technical Practices Issue 1 Manual

							TL-130500-1001
Table 34.2 Table T2541
ENTRYENTRY NO. WORD CONTENTS ADDRESSHEXCONVERSION
TYPEDEC (HEX) NO.BINARYHEXENTRYTABLE A
67543210
12DECBINHEX
LINE SOFTWARE IDNO.0
(0)cl00010000101010000000
LINE SOFTWARE IDNO.
8(8)00001110010111c100011LINE SOFTWARE IDNO.16
(10)00001100010121B200102
LINE SOFTWARE IDNO.24
(18)00010110010132c300113LINE SOFTWARE IDNO.32
(20)00010100010142B401004
LINE SOFTWARE IDNO.40
(28)000100100101524501015
LINE SOFTWARE IDNO.48
(30)000100000101620601106
LINE SOFTWARE IDNO.56
(38)00011110010173c701117LINE SOFTWARE IDNO.64
(40)00011100010183BLINE SOFTWARE IDNO.72
(48)000110100101934
LINE SOFTWARE IDNO.80
(50)000110000101A30LINE SOFTWARE IDNO.88
(58)001001100101s4c
LINE SOFTWARE IDNO.96
63’3001001000101c4I3LINE SOFTWARE IDNO.104
(68)001000100101D44
LINE SOFTWARE IDNO.112
(70)001000000101E40
LINE SOFTWARE IDNO.120
(78)001011100101F5c
LINE SOFTWARE ID
NO.128630)00101100010205I3LINE SOFTWARE IDNO.136
(88)001010100102154
LINE SOFTWARE IDNO.144
(90)001010000102250
LINE SOFTWARE ID
NO.152(98)00110110010236CLINE SOFTWARE IDNO.160
VW00110100010246BLINE SOFTWARE IDNO.168
m3)001100100102564
LINE SOFTWARE IDNO.176
@O)001100000102660
LINE SOFTWARE IDNO.184
WV001111000102770LINE SOFTWARE IDNO.192
VW001110000102870
LINE SOFTWARE IDNO.200
@3)0111100001029F0
LINE SOFTWARE IDNO.208
PO)011110000102AF0
LINE SOFTWARE IDNO.216
uw0111100001028F0
LINE SOFTWARE IDNO.224
PO)011110000102cF0LINE SOFTWARE IDNO.232
w011110000102DF0LINE SOFTWARE IDNO.240
VW011110000102EF0
LINE SOFTWARE IDNO.248
(W011110000102FF0
SPECIAL ENTRIES
0111111111030FF
SW 52108437S-323 
						

							TL-130500-1001
Table 34.3 T2541 DescriptiontT2541 - PEC-0 LINE CARD ADDRESSTABLE.
(I l .t * 1. t .t f .* l l * .(I l 0 l f .* .*.* 1THIS TABLE PROVIDES THE HARDWARE POSITION OF EACH EQUIPPED LINE CARD, DETERMINES THE ORDER OF LINE
SCANNING, AND ESTABLISHES THE SOFTWARE ID FOR EVERY LINE IN PERIPHERAL EQUIPMENT COMPLEX 0
LOCATION:CEC DATA PAGE 0 FOR THE St SYSTEM.
COMMON MEMORY FOR PEG0 FOR THE 53 SYSTEM.
TABLE SIZE:
33 BYTES
TABLE LAYOUT:32 IDENTICAL 1 BYTE BLOCKS WITH A HEX FF END OF TABLE MARK IN THE LAST BME.BLOCK INDEXING.THE LINE CARD ADDRESSES ARE ACCESSED BY AN INDEX INTO THE LINE CARD ADDRESSES
TABLETHIS INDEX IS THE LINE CARD ADDRESS NUMBER.
HEX FILL VALUES FOR UNUSED BYTES. BYTE 
O-F0
LINE CARD ADDRESS ND 0
t7 
1 6 1  5 1 4 1 3 1 2 1 ’ I 0---+--+--+--+--t--t--+--.; ;A$,““,;~GEsFoR : * SLOT #--PHYSICAL LOCATION
OOOO=O 0100=4 1000=8
I I
fSI o-1110001=1 0101=5 1001=9*BYTECARD SLOTGROUP
0LINE TYPE 153 O-100010=2 0110=6 1010-10*0011=3 0111=7 1011-11
---+--+--+--+--+--+--$--- f
fGROUPGROUP#--PHYSICALLOCATIONfOO=A*.01 =BLINE CARD ADDRESS NO 311o=cl
l11 =D---+--+--+--+--+--+--$--CARD SLOT
I I
GROUPL I N ETYPE
*LINE TYPE00 = POTSPOTS PHONE
.
01 = FEAT FEATUREPHONE10 = LOGLLOGICAL LINEfBYTE0---+--t--,--+--+--i--+--
;PEClAEND OF TABLE
END OF TABLE MARK-THIS SPECIAL ENTRY IS ALWAYS
:NTRY1I111111tC--+--+--+--+-+--+-+--j lSET TO
FFTHE LINE 
SOmARE ID IS DETERMINED BY THIS TABLE. TO DETERMINE A LINE SOWARE ID FIND THAT LINE’S CARD
SLOT AND GROUP IN THE TABLE. TAKE THAT LOCATION’S PARTIAL SOFTWARE ID (UNDER ENTRY NUMBER) AND ADD
THAT LINE’S CIRCUIT NUMBER TO IT TO CALCULATE ITS 
SOFrWARE ID.
THE MUSIC ON HOLD CIRCUIT IF PRESENT IS TREATED IN AN IDENTICAL MANNER AS A LINES PHYSICAL LOCATION.
THE PHYSICAL LOCATION OF LOGICAL LINES MUST BE AS FOLLOWS: GROUP A, CARD SLOT 00.
Table 34.4Party 
IdentiferKircuit Number
HARDWAREEQUIPMENT
PCMUS 4, FILE AIDENTIFICATIONINTERFACE
NUMBERCIRCUIT NUMBER
ICalling Party 1
ICalled Party
I
S-324
8187SVR 5210 
						

							TL-130500-1001Processing342.2 This paragraph describes the various tasks
a Callperformed by the system when a call is processed. The
example presumes that a station-to-station call is being
processed and that particular pieces of equipment are
used. (Table 34.4). Specific hardware items have been chosen
so that descriptions of the system activities can also be
illustrated in terms of the time-switch network memories and
their data contents. Illustrations are presented to show the
changes in memories that occur to effect each task in call
processing.
TIME
IDLE
SWITCH
NO. 1CHANNELCONTROL -ACONTROL BPAD
m * *2x -Wh
15)**3c* ] FO ;78 ; D8 :78 ; D8 ;78 ; 07 I
pm4wmym3
:16)**40* ; FO ;80 1 D8 :80 ; D8 :80 ; 07 ;
i%zziv%2mym
(20)**50* ; A3 ) A0 j D8 ;A0 ; D8 iA0 ; 07 !
WSIwz!I%mI1m;*
3C. 40,44,50. ETC., ARE LOW ORDER ADDRESS BITS.**(XX) IS THE TIME SLOT OR CHANNEL NUMBER.*** THIS FIGURE IS DISCONTINUOUS, SOME ADDRESSES DO
NOT APPEAR.
Figure 34.2Time-Switcn rdemorles uurlng laleFigure 34.2 shows the status of the memories during an idle
condition, no calls are in progress and no calls are attempting to
get started. In channel memory, the FO indicates idle status.
The A3 indicates a time slot that is dedicated to a PCM DTMF
receiver. In control memory, D8 is a special information memory
address that contains quiet tone.
In pad memory, the 07 indicates idle, no attenuation factor is
selected and interconnect memory is not in use (see word format
in TL-130200-1001). In information memory, there is no data
because no calls are in progress. The contents of control
memory B will always be the same as control memory A
because three-way calls are not included in this description.
SVR 5210
8187S-325 
						

							TL-130500-1001
An arrow head (>) is used in the memory illustrations to indicate
the changes in content. For example, FO 
> 24 means that
channel memory address has changed from idle status (FO) and
now contains the hardware identify number (24) assigned to a
piece of equipment.
The CPU routinely executes a 
IOO-millisecond slow scan of
sense points on all the line, trunk, and feature equipment
interface cards. All circuits on equipment interface cards have
request-for-service sense points. Some equipment interface
cards such as trunk, DTMF receiver, Attendant Console, and
some feature cards have more than one sense point.
Call Request34.2.3 The following sequence of events occurs when a
for Servicesubscriber goes off-hook, or requests service from the system
by some other means (e.g., depresses LOOP pushbutton switch
on Attendant Console).
l Subscriber goes off-hook. This signals his line, trunk, or
equipment interface card that service is requested. This
request causes the sense point associated with that line to be
conditioned to the request-for-service state.
l The slow-scan routine consists of the CPU sending address
inputs to the FB-17215-A MPB85 (Multiprocessor Buffer)
card. In response, the MPB85 card produces equipment
interface select (card select) outputs that systematically enable
(scan) the equipment interface cards, one at a time. The
MPB85 card also produces circuit select outputs that
systematically enable the sense point circuit(s) on the enabled
equipment interface card.
l Each time an equipment interface card is scanned, the level
on the sense point output(s) from the selected equipment
interface circuit(s) on the equipment interface card is applied
as input(s) to the MPB85 card. The line interface card is
enabled by one equipment interface select (card select) from
the MPB85 and does not require the use of circuit address
inputs. Up to eight sense points representing a digital word
are read from equipment interface cards. Each bit in a digital
word may indicate a particular type of request, e.g., seizure
request, or feature initiation request.
l The CPU routinely addresses the MPB85 card and reads up to
eight sense point status inputs through the MPB85 card, onto
the CPU data bus, and into the CPU.
S-3268187SVR 5210 
						

							SW 5210TL-130500-1001
0 The CPU then examines the eight sense point status bit inputs
to determine if the status changed on any of the sense points
from the last time they were read. As an example, when a
telephone connected to a line card is taken off-hook, the tip
and ring input to the line card will change from an open
condition to a closed condition. This causes the related
seizure request input to the CPU from the MPB85 card to
change from a high to a low level. This change is detected as
a line seizure request for service by the CPU and is loaded
into an event data message.
NOTE: The CPU actually checks the seizure request input twice
(two 
lOO-millisecond scans) before a request is verified.
0 The CPU routinely loads event data messages into common
memory on the MPB85 card. The CPU then reads these
messages from each MPB85 card. This event data message
contains the hardware identification for the equipment interface
card circuit or circuits (ports) that produced the request for
service. It also contains the type or condition that produced
the request (i.e., identifies that the request was produced by an
on-hook to off-hook condition from line interface card X;
where X = hardware ID assigned to that line card within the
data base); also, it identifies whether or not the request was
produced by an attendant depressing a LOOP or feature
pushbutton on the Attendant Console.
l The CPU checks the event data message to determine the
type of request that was generated (e.g., on-hook to 
off-hook, feature initiation request, etc.).
l The CPU enters the Line-Record-Code Check routine.
Line Record34.2.4 After receiving a request for service, the system CPU
Code Checkchecks the line (or trunk) record code tables assigned to the call
originator’s line (or trunk). Data base line record data tables
(resident in system CPU RAM) define to the system CPU exactly
what features are assigned to the originator’s line including the
type of subscriber’s equipment (i.e., DTMF telephone, DP
telephone, or MIXED (where mixed = DTMF or DP telephone) or
NONE (where none = Not DTMF, and not DP, and not MIXED).
After checking the line record code table, the CPU enters the
time slot assignment routine.
8187S-327 
						

							TL-130500-1001Time Slot34.2.5 When the system CPU detects a request for service in an
Assignmentevent data message, it looks for an available time slot to assign
to the requesting interface card.
The following sequence of.events occurs when the CPU receives
a request for service from an equipment interface card:
* Based on the equipment interface card hardware identification
number in the event data message, the CPU examines tables
(data base) in CPU memory that give the software identity for
the equipment file in which the equipment card is located.
l The CPU then checks “time slot busy/idle status” tables in the
CPU memory. These tables indicate which information
memory locations are currently available within the block of 24
information memory locations allocated to each associated
PCMUS group. Information memory for the system is located
on the EPCMN (Expanded Pulse Code Modulation Network)
card. By continually updating the time slot busy/idle status
tables, the CPU keeps track of the number of time slots that
are available or busy within each block of 24 information
memory locations (groups).
l If an information memory location (time slot) is not available,
the originating party’s line remains silent until a time slot
becomes available.
l If an information memory location (time slot) is available, the
CPU loads the hardware identification number (of the caller)
into the channel memory address associated with 
(one-to-one correspondence) the available information memory (time
slot). This action assigns that time slot to that particular
hardware. The CPU then performs the following functions:
- The CPU writes into the control memory address of that time
slot. The data written into control memory address is an
information memory address that is listened to by the
originating party; first for dial tone and, as will be explained
later, then another information memory address for voice or
data from the called party. The CPU reserves this time slot
for the duration of the call or feature implementation.
S-3288187SVR 5210 
						

							SVR 5210-.TL-130500-1001
- The CPU loads an attenuation factor address into the time
slot associated address in PAD memory on the EPCMN
card. The contents of this PAD memory address are used
by the PROM PAD attenuator chip on the EPCMN card,
which provides the proper attenuation as the system
transmits (PCM) tones or voice to the originating party or
called party. The attenuation factor address bits that are
loaded into PAD memory are based on the CPU’s
determination of the type of line or trunk to which the
originating party is connected. These addressing bits
determine the 
dB level of the signal out of the PROM PAD to
the originating party or called party. The 
dB levels are
different for different types of lines or trunks. The type of line
or trunk was determined during the line record code check.
8 The CPU routinely reads the common memory on the MPB85
card and locates a directive to load the equipment interface 
!Dnumber into the time slot associated address (one-to-one
correspondence) in channel memory. The contents of this
address will be used to enable the equipment interface card
when the system begins to transmit dial tone to the equipment
interface card or begins to sample voice, digital, or DTMF
information from the equipment interface card (explained later
in this call-processing description).
o The CPU also loads that equipment interface hardware
identification number into a fast-scan table.
0 The CPU now proceeds to scan the requesting interface card
at a fast scan rate (1 O-millisecond cycle time). Any other
interface card that was previously assigned a time slot is also
being scanned at the fast scan rate.The fast-scan
sequence is sandwiched with the slow-scan sequence, which
is still being performed on those interface cards that have not
requested service.
b If the line record code check determined that the request was
for line or trunk seizure and the originator’s line or trunk is
assigned to the the DTMF or MIXED signal mode, the CPU
enters the DTMF receiver assignment routine. If the originator
is not assigned to DTMF or MIXED service, the CPU enters the
transmit dial tone routine.
DTMF Receiver34.24 This routine is only executed if the line record code check
Assignmentperformed by the CPU determines that a line or trunk requesting
Routine (Exceptservice is assigned to a DTMF or MIXED signal mode.
Featurephone)If the subscriber has a DTMF telephone, the DTMF tones
produced when the subscriber keys in a number must be
converted to digital bits that the system computer can interpret.
This is done by a DTMF receiver. Therefore, if the subscriber
has a DTMF telephone, a DTMF receiver must be assigned to
receive the DTMF tones.
8187s-329 
						

							TL-130500-1001
The DTMF receivers (just as any other peripheral equipment) are
assigned time slots and have sense points that are scanned by
the CPU. A dedicated time slot is assigned to a DTMF receiver,
so that the receiver’s hardware identification number is always
present in a time slot’s channel memory. Thus, the information
memory address of the subscriber’s time slot is put into the
receiver’s control memory so that the receiver can listen to the
subscriber tones when dialing. As memory sampling occurs
(time-switch network control), the DTMF receiver sees PCM
samples (coming through the time-switch network from the
subscriber) and puts the samples on the digital data link
(sense/read) to the CPU through the MPB85 card.
A fully configured system can support eight DTMF receivers.
Trunks or lines supporting DTMF telephones share the DTMF
receivers. A DTMF receiver that has been assigned to a DTMF
input is busy during the time that it has been assigned to receive
DTMF tone(s) from a particular subscriber. Thus, when a
request-for-service is received from a DTMF telephone, the
system CPU must check for the availability of a DTMF receiver
before transmitting dial tone (permission to dial) to the callingparty.Dial Tone to34.2.7 After the system has determined that a time slot is
Subscriberavailable and has assigned the time slot to the subscriber, it
must make a path from the dial tone source to the requesting
interface card, and then to the calling party. Special extra
addresses in information memory are used to store digital data
samples (PCM) of all the various tones used in the system.
These extra addresses are updated regularly with samples from
the tone source card (FB-20974-A PCMTS). Dial tone will
notify the calling party that the system is working, that the calling
party’s request-for-service has been recognized, and that
permission has been granted to dial a number.
The following sequence of events occurs for dial tone to be
transferred to the subscriber’s equipment after a 
request-for-service has been recognized, and a time slot has been assigned
to the equipment interface card (it shall be assumed that the dial
tone is to be transferred to a line interface card connected to a
telephone).
l The Channel Memory card produces binary-coded outputs
that are decoded into a discrete equipment interface select
output by the FB-17189-A PCMFS (Pulse Code Modulation
Frame Sync) card. The PCMFS outputs systematically enable
the requesting equipment interface card circuits, one at a time,
in the file for a period of approximately one microsecond.
8187SVR 5210 
						

							 r
SVR 5210TL-130500-1001
l The CPU accesses the control memory of the subscriber’s
time slot and prepares to write an information memory address
into control memory. The address now in control memory is
one of the special, extra information memory addresses that
contains the quiet code. For this particular case (dial tone),
the control memory must contain the address of information
memory that has dial tone (another special, extra information
memory address).e The CPU, therefore, writes into the subscriber’s control
memory, the information memory address that contains dial
tone. This action connects the subscriber to dial tone (Figures
34.3 and 34.4).
TIME
SWITCHORIGINATING TELEPHONE (GROUP A, PCMUS 2, CIRCUIT 4) GOES OFF-HOOK
NO. 2AND TIME SLOT IS ASSIGNED
CHANNEL
CONTROL-ACONTROL 
- BPAD
INFORMATION
pIz+zimpzzz%y,2?44w3C 
; FO ;78 ; Da I78 ; Da (78 f -- I
WA78 
; 07 I
#4y/z%!y%GV//A40 
; FO :80 ; DE ;80 ; D8 ;80 ;  07 ;II
80 I  -- I
mmm44 
IO>24
mi2zM88 ;  
Da I88 i Da I
m
88 ;  07 I
wmm88 j  
9:“; i
I ckt 4 I
#%I#cm1m1WIMd50 
; A3 ;A0 ;Da ;A0 ; D8 fA0 ) 07 ;I m
w11m1%Iw%1A0 i -- :
1zb
WA’  dial ’
Co ltonei;  
zqDa IquietIterm.
bd
F8 i  I,“$
I%?$
Figure 34.3Off-Hook Time Slot Assignment
l The INCKS (Synchronizable Intermediate Network Clock) card
generates control signals which produce a dial tone select
input to the PCMTS (Pulse Code Modulation Tone Source)
card. This action reads digital dial tone data (PCM) out of
PROM storage on the PCMTS card. Under control of a write
signal from the INCKS card, dial tone PCM data is written into
the special information memory location assigned to dial tone.
Similarly, digital samples (PCM) of other tones and signals that
are used by the system are taken from the PCMTS card and
written into special information memory locations. The
samples are updated every 125 microseconds and can be
connected to any subscriber simply by writing the appropriate
information memory location into the control memory of the
subscriber’s time slot.
8187s-331 
						

							TL-130500-1001__-.TIME
DTMF RECEIVER ASSIGNED AND ORIGINATING TELEPHONE HEARS DIAL TONE
;WITCHNO. 3 CHANNELCONTROL-ACONTROL BPAD
INFORMATION
;+%%Ii////
; FO i
;?32q;5Y2%vzpz478 
I Da I
#5///j78 
I Da I78 : 07 I781 -- I
I/////AI Y////4VWA40 
;FO ’a0 I Da I
y////A
A0 ;07>371
!5SH44
Figure 34.4DTMF Receiver Assignment and Dial Tonel After dial tone is connected to the subscriber, a read control
signal is activated from the 
INCKS card. This causes dial tone
PCM to be read out of information memory and to be
transferred through the PROM 
PAD.to interface circuits on the
CHM85 (Channel Memory) card.
l The dial tone PCM data is transferred through the interfacing
circuits on the FB-17218-A (Channel Memory) card and onto
a common bus that feeds the various conversion devices used
in the system (e.g., PCM 
Tl Buffer and Span Interface).Theconversion device that is enabled at this point depends on the
channel addressing input to the Channel Memory card.
l The dial tone PCM data is converted to analog by the line
interface card associated with the telephone that was taken
off-hook. The line interface card is receiving an enable from
the PCMFS card under control of the Channel Memory card.
* The analog dial tone is transferred through the line interface
card onto the tip and ring leads that are connected to the
subscriber’s telephone. The subscriber hears dial tone. Dial
tone notifies the calling party to start dialing the destination
number.
8187SVR 5210