GTE Omni Si Database Technical Practices Issue 1 Manual
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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 S-l 64 8187SW 5210
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. SVR 52108f87S-165
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. 8i87SVR 5210
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 s-1 68 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 23528811025SVR 5210 8187S-169
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. 8187SVR 5210
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 SVR 52108187 S-l 71
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. S-l 72 8187SVR 5210