GTE Omni Si Database Technical Practices Issue 1 Manual

							TL-130500-1001Traffic10.5 Table 10.7 provides the number of available CCS for both a
EngineeringPO.01 and PO.02 grade of service. When the line and trunk CCS
usage has been calculated and the number of dedicated time
slots determined (if any), compare the CCS used (under P =
0.01) against the CCS offered. With each dedicated time slot
usage, the amount of offered CCS decreases approximately 30
CCS units.
The calculated 
CCSgroup should not exceed the values as listed
in the P = 0.01 column of the table below. Table 10.5 shows the
various maximum traffic levels per PCMUS group that will result
in a probability of blockage (P level) of 0.01 or 0.02.
Table 10.7Traffic Capacity of a PCMUS Group Summary
Number of
Dedicated
Time SlotsNumber ofTraffic Capacity (CCS)
Remaining
Channels
P= 0.01P=
0.02
024529570
123500540
222472510
321443480
420415451
519388422
618360393
717331364
816302335
NOTES:l PO.01 and PO.02 represent the blocking factors: A PO.01
rating indicates the probability that one call may be blocked
when 100 calls are attempted in a busy hour.
l The number of remaining channels is the number of time
slots remaining after dedicated time slots have been
subtracted from the 24 available time slots.
0 The traffic capacity for a fully configured system is 3174
CCS at P = 0.01 with no dedicated time slots.
l Tie lines are normally configured at a lower grade of service
(PO.04 or 
PO.05) due to their high cost.
SVR 52108187S-163 
						

							TL-130500-1001* The various groups (A, B, Cl, C2;,Dl, D2) should be at
approximately the same CCS level to compare a group
containing no dedicated time slots with one that does.
Subtract the offered CCS from the used CCS. An example
containing dedicated time slots is shown in Figure 10.5.
TI-PCMUS GROUP C 48 TIMESlIFILE AI!4
k :
~
x c13
4LOTS 
-
c 24+
1
-
PCMUSGI48 TIMEt
d1
T?Za
Slots
=File
Total
t144Time
Slots=
SystemTotal
i
Tf&Slots
FieTotal COMMON
- CONTROL -FILE 
Bf COMMON CONTROLPCMUS GROUP 0c-- 24 TIME SLOTS -t
fit !Figure 1Example: Comparison of group traffic for a group containing
dedicated time slots with a group with no dedicated time slots
(Figure 10.5).
l Group A (24 x 6) + (8 x 18) = 288iCCS
(Line Circuits x CCS) (Trunk Circuits x CCS) = Total CCS
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							TL-130500-1001
- For this example, the PLCC cards in slots A2, BO, and 62are used to support non-IFP phone and therefore require
the access to a DTMF card circuit. (The other PLCC cards
in conjunction with their collocated CIP cards support 
IFPand do not require access to a DTMF card circuit.)
- 3 PLCC are supporting 24 phones.
(3 cards x 8 circuits) = 24
- Table 10.5 indicates that 24 phones will require one DTMF
card and use three circuits on that card.
- Comparing the number of CCS used in group A to the
number of dedicated time sots required in the 3 DTMF
circuits in group A (Table 10.5) with 3 dedicated time slots,
the offered CCS is 443. The 443 offered CCS is greater than
the 288 used CCS so group A fits into the PO.01 grade of
service.
l Group B
- 4 line cards (17254) x 8 circuits per card = 32
- 2 trunk cards (17202) x 4 circuits per card = 8 trunks
NOTE: The CIP (17225) data link cards do not use time slots.
- (32x6CCS) + (8xl8CCS) = 336
- Table 10.5 gives the offered CCS with no dedicated time
slots as 529 so group 
I3 with 336 CCS fits into the PO.01
grade of service.
l Comparing the used CCS of group A (288) to group B (316)
does not give an accurate comparison because dedicated
time slots are needed by group A.
- To get a more accurate comparison, subtract the used CCS
of each group from the offered CCS and compare to two to
determine how well balanced the system traffic is.
- The difference in CCS available per group is 38 more
available CCS for group 
8.
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							Examples of10.6 The following examples of typical line and trunk layouts
Proper Traff icingfurther illustrate how to consider traffic capacities. An asterisk
indicates traffic estimates that exceed a 0.01 P level.
S 1 CCS Calculationsl The 
following examples are based on 9 CSS per line and 20
GroupCSS per 
trudk.’
Example 1
Line
TrunkDTMFATTIccs
S-166
039441431
1488592
8712411023NOTE: To reduce the possibility of blockage:
l Remove a line card from PCMUS group 0.
0 Remove both a line and a trunk card from PCMUS group 1.
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							TL-130500-1001Example 2
Group
0
1
4
5
6
7
Line
48
64
3
40
40
40
235
Trunk
4
4
16
4
28
DTMFATT1ccs
4512656
1347
360
4360440
812675
SW 52108187NOTE: To reduce the possibility of blockage:
1. Remove two line cards from PCMUS group 0.
2. Remove two line cards from PCMUS group 1.
3. Remove two trunk cards from PCMUS group 4.
4. Enable the five spare line circuits on the existing line card in
PCMUS group 4.
5. Add a line card and DTMF card to PCMUS group 4.
6. Remove a line card from PCMUS group 5.
7. Add a trunk card to PCMUS group 5
8. Remove the DTMF card from PCMUS group 6.
9. Assign one of the line circuits in PCMUS group 6 as the
Attendant’s voice line with guaranteed access.
10. Remove a line card from PCMUS group 7. 
						

							TL-130500-1001l The following examples are based on 6 CCS per line and 18
CCS per trunk.
Example 3/
GroupLineTrunkDTMFATT1ccsIj
039441306
1488432
87124
1738
Example 4
Group
LineTrunkDTMFATT1ccs
04844360
164
4456
43
161306
540
240
640
4240
7404
312
235
28
811914
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8187SVR 5210 
						

							TL-130500-1001l The following examples are based on 3 CCS per line and 16
CCS per trunk.
Example 5
Group
LineTrunkDTMFATT1ccs
039441181
148
8272
8712414531
Example 6
Group
LineTrunkDTMFATT1ccs
04844208
1644256
43
161137
5
40120
6
404120
7
404184
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							TL-130500-1001
CAS Main/ACD System10.7 Table 10.8 describes engineering for the CAS Main
and ACD operations.
Engineering
Table 10.8CAS 
Main/ACD Related System Capacities
s-1 70
ITEMSYSTEM
CAPACITYREFERENCE NOTECAS 
Main/ACD Groups8CAS 
Main/ACD Agent PACET16CAS Branch Locations
32
CASACD Source Groups321 (see 10.7)
ACD Single Line Agents
192Supervisor Positions
8Supervisor 
I/O Ports1Recorder Announcer Trunks
Release Link Trunk (RLT) Interface Circuit
(Branch Location)
52 (see 10.7)
163 (see 10.7)
NOTES:
1. CASACDAagent instruments per system is 16. Depending
upon a per-job data base option, 
CASACD Agent
Instruments require one or two station line circuits and one
data link port. For every two data link ports used, the
number of lines is reduced by eight or the number of trunks
is reduced by four.
2. CASACD associated recorder announcer can access
access five trunk circuits (first delay, first alternate delay,
second delay, second alternate delay, and night answer).
3. Incoming RLT interface trunks (loop or E&M) 15. All 
RLTsdirected to a specific CAS group from several CAS Branch
systems are considered a single-trunk group (i.e., as one
of the system’s 64 trunk groups). Therefore, a maximum of
4 of the system’s 64 trunk groups is required for CAS Main
operation. Each RLT card reduces the maximum mix of
lines and trunks by eight lines or four trunks.
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							TL-130500-1001System Capacities10.8 Table 10.9 identifies the system capacities for lines, trunks,
and peripheral devices. Table 10.10 identifies the capacities for
site-dependent universal cards and also identifies the number of
circuits per card. Table 10.11 identifies the voice data circuit
ratios without a 
Tl span. Table 10.12 identifies the voice data
circuit ratios with a 
Tl span.
Table 10.9
Line, Trunk, and Peripheral System Capacities
REFERENCE
GETNOTE
ITEMSTARTEDEXPANSIONSYSTEM
FILETOTALS(seeFILEfollowing
page)Lines
1361842561Analog Featurephone
1272Digital Featurephone
12710Trunks
3654641Trunk Groups
64Attendant Consoles
23Busy Lamp Display Unit
44Key Entry Display Unit
4Hotel/Health Care Printers
4DTMF Receiver Circuits
8DTMF Line Capacity
1111392505
Tl Digital Interface with 24 Trunks-
11Recorder Announcer Accesses
-6468-Party Conference Circuits
27Dictation Access Circuits
No Limit
8Display Telephone
Equal to total
9number of
stations in the
system
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							TL-130500-1001
NOTES:
1. The line and trunk maximums cannot occur simultaneously.
At 256 lines, the maximum trunk quantity is 28. Adding
additional trunks or adding feature cards decreases the
maximum by as many as 16 lines, depending on the
required mounting space.
2. Every eight Digital Featurephone interface circuits, reduce
the maximum mix of lines and trunks by eight lines or four
trunks. Four Digital Featurephones can have a DSS AOM
(Add-On-Module).3.Up to 64 standard station instruments can have a DSS
appearance on only two Digital Featurephones. A maximum
of four Digital Featurephones can have up to 16 line
appearances and all others can have a maximum of four line
appearances. A maximum of 16 Digital Featurephones can
have up to four control line appearances, and up to 16 more
can have two control line appearances, with all others
having only a single control line appearance.
4. Each Attendant Console interface circuit reduces the
maximum mix of lines and trunks by eight lines or four
trunks.
5. A BLDU (Busy Lamp Display Unit) varies with the
configuration of the system. A BLDU can be associated with
each Attendant Console and/or can be an independent
monitoring device at other locations where BLDU hundreds
keys are used to select the display.
6. DTMF Receivers: Two cards per system; four DTMF
receiver circuits per card. When the DTMF receiver card is
placed in the reserved card slot, the maximum mix of lines
and trunks is not affected, otherwise eight lines or four trunks
are lost. One DTMF circuit is required for each of the two
attendants.
7. Recorder announcer access circuits: 64 maximum
(requires a dedicated E&M trunk).
8. Conference circuits (eight-party): A maximum of two
conference circuit cards can be used in the system. For
each conference circuit that is placed in a card slot, other
than the one reserved for it in a cabinet, the maximum mix of
lines and trunks is reduced by eight lines or four trunks.
Otherwise, there is no reduction in the maximum mix of lines
and trunks.
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