GTE Omni Si Database Technical Practices Issue 1 Manual
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![Page 519
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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. 8187S-l 43
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 S-l 44 8187SVR 5210 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 S-l 46 8187SVR 5210
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 8187s-147
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). 867s-1 49
--TL-130500-1001 14131211109878543 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.) S-l 50 8187SVR 5210
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 SVR 5210 8187s-151
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. S-l 52 aia7SVR 5210