NEC Neax 2000 Ivs2 Q-Sig System Manual
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NEAX2000 IVS2 Q-SIG System ManualPage 4 ND-70923 (E), Issue 1.0 CHAPTER 1 GENERAL INFORMATION System Outline SYSTEM OUTLINE Summary This feature allows the PBX to provide basic connection service for interfacing with the other PBX by using Layer 3 protocol which conforms to ETS 300 172. ETS 300 172 is standardized for private telecommunication network as Inter-exchange signaling protocol for circuit mode basic services by European Telecommunication Standards Institute (ETSI). The Q-SIG protocol creates Layer 3 messages between Q reference points expected as conceptual point for inter- office signalling. Figure 1-1 System Outline of Q-SIG PBX DTIData Link Layer Physical Layer Call Control Protocol ControlQ PBX DTIData Link Layer Physical Layer Call Control Protocol ControlQ DTI Q-reference point Layer 3 Layer 1 NOTE:Conforming to Q921-a (PBX-PBX Interface) Layer 2 NOTE
CHAPTER 1 GENERAL INFORMATION System Outline NEAX2000 IVS2 Q-SIG System Manual ND-70923 (E), Issue 1.0 Page 5 Physical Interface 30DTI On the Q-SIG system, a 2 Mbps digital interface is used for the interface trunk. A D Channel Handler is required for each physical interface. A single data link channel can control a maximum of 30 B Channels. Figure 1-2 Physical Interface Physical Interface 24DTI On the Q-SIG system, a 1.544 Mbps digital interface is used for the interface trunk. A D Channel Handler is required for each physical interface. A single data link channel can control a maximum of 23 B Channels. Figure 1-3 Physical Interface Physical Interface : D Channel : B Channel DTI PBX DTI Physical Interface Max. 30B + D Max. 30B + D Physical Interface : D Channel : B Channel DTI PBX DTI Physical Interface Max. 23B + D Max. 23B + D
NEAX2000 IVS2 Q-SIG System ManualPage 6 ND-70923 (E), Issue 1.0 CHAPTER 1 GENERAL INFORMATION System Outline Interworking with Other Network The PBX can be connected with the other manufacturer’s PBX by the Q-SIG interface, and the Q-SIG network can interwork with the other network. Figure 1-4 Interworking with Other Network NEC ISDN Q-SIG Network ACIS Existing Office Existing OfficeCCISQ-SIG interface Other Manufacturer NOTE:Interworking between Q-SIG and CCIS is not available. Network
CHAPTER 1 GENERAL INFORMATION System Configuration NEAX2000 IVS2 Q-SIG System Manual ND-70923 (E), Issue 1.0 Page 7 SYSTEM CONFIGURATION Figure 1-5 shows the system configuration of the Q-SIG system. Figure 1-5 System Configuration of Q-SIG CLOCK PBX 30B/23B SLT FPMP 30-CHANNEL PCM/23B DIGITAL LINE DTI: 30/24-Channel Digital Trunk Interface DCH: D Channel Handler PLO: Phase Locked Oscillator D TDSW DCH DTI PLO LC NETWORK Dterm DLC Q-SIG
NEAX2000 IVS2 Q-SIG System ManualPage 8 ND-70923 (E), Issue 1.0 CHAPTER 1 GENERAL INFORMATION System Configuration 30DTI The Digital Trunk Interface (DTI) interfaces the PBX directly to 30-channel PCM transmission line. The 30-DTI has the following functions. Unipolar/Bipolar Conversion (HDB3 Format) Signaling Insertion/Extraction Alarm Detection/Insertion Digital PAD on Voice Signal Transmission Cyclic Redundancy Checking (based on ITU-T Rec. G704) Channel Associated Signaling (based on ITU-T Rec. Q421 Digital R2 Signaling Code) For connection of a 30-DTI and transmission line, either coaxial cable or twisted pair cable can be used. DCH The D Channel Handler (DCH) provides the D Channel signaling interface through the DTI to a Q-SIG network, and it is responsible for signaling between the PBX and the network under control of the system MP. A DCH can control a maximum of 30 B Channels. 24DTI The Digital Trunk Interface (DTI) interfaces the PBX directly to 24-channel PCM transmission line. The 24-DTI has the following functions. Unipolar/Bipolar Conversion (AMI Format) Alarm Detection/Insertion Digital PAD on Voice Signal Transmission Cyclic Redundancy Checking (based on ITU-T Rec. G704) For connection of a 24-DTI and transmission line, a twisted pair cable can be used. DCH The D Channel Handler (DCH) provides the D Channel signaling interface through the DTI to a Q-SIG network, and it is responsible for signaling between the PBX and the network under control of the system MP. A DCH can control a maximum of 23 B Channels.
CHAPTER 1 GENERAL INFORMATION System Configuration NEAX2000 IVS2 Q-SIG System Manual ND-70923 (E), Issue 1.0 Page 9 PLO The Phase Locked Oscillator (PLO) equipped on the MP card is responsible to synchronize the system to Q-SIG clocks. The PLO generates the clock signals according to the source clocks received from network. The source clock signals are extracted at DTI cards and supplied to the PLO. Two clock routes are available; one is the Route 0 to receive clock signals from DTI0, and the other is a standby Route 1 (DTI1) to receive clock signals when no clock signals appear on the Route 0. When clock signals come from neither the Route 0 nor the Route 1, the PLO keeps generating the clock signals with the frequency of previous source clock. The PLO can receive different frequency of source clocks from the Route 0 and Route 1. Figure 1-6 shows an example of clock supply route. Figure 1-6 Clock Supply Route Configuration PBX TDSW DTI1 PLO NETWORK DTI0 : CLOCK SIGNAL SUPPLY ROUTE 0 : CLOCK SIGNAL SUPPLY ROUTE 1 Q-SIG NOTE:DTI0 and DTI1 must be mounted in PIM0. NOTE
NEAX2000 IVS2 Q-SIG System ManualPage 10 ND-70923 (E), Issue 1.0 CHAPTER 1 GENERAL INFORMATION Card Name and Function CARD NAME AND FUNCTION Table 1-1 shows the circuit card name and function for Q-SIG. Table 1-1 Q-SIG Card Name and Function CARD NAMEFUNCTIONAL NAMEFUNCTION PN-CP14 MP Main Processor Card Provides Memory, TDSW (1024CH x 1024CH), 16-line CFT, PB sender, Clock, PLO 2 ports (receiver mode/ source mode), two RS-232C ports, 2-line DAT (Recording duration: Max. 128 sec.), DK, 4-line PB receiver, Modem for remote maintenance (19.2 kbps), internal Music-on-Hold tone source and BUS interface. BUS interface functions as a driver/receiver of various signals, adjusts gate delay timing and cable delay timing, monitors I/O Bus and PCM BUS. One card is required per system. PN-30DTC-A DTI Digital Trunk Interface (2 Mbps) Card Accommodates 30-channel PCM digital lines. PN-SC01 DCH D Channel Handler Card Provides the D Channel signaling interface through the DTI to Q-SIG network. PZ-M542 [For Other Countries]CONN Coaxial Cable Connection Card Used to connect a coaxial cable for the Digital Trunk Interface. Maximum of two cards can be connected to LTC connector of each PIM. PZ-M557 [For Australia]CONN Coaxial Cable Connection Card Used to connect a coaxial cable for the Digital Trunk Interface. Maximum of two cards can be connected to LTC connector of each PIM. PN-24DTA-C DTI Digital Trunk Interface (23B+D 1.5 Mbps) card Accommodates 24-channel PCM digital lines.
CHAPTER 1 GENERAL INFORMATION System Capacity NEAX2000 IVS2 Q-SIG System Manual ND-70923 (E), Issue 1.0 Page 11 SYSTEM CAPACITY Table 1-2 System Capacity for Q-SIG DESCRIPTION 24DTI 30DTI DTI Card 8 4 DCH Card 8 4 Trunks for DTI 192 124 Q-SIG Routes 8 4 Trunks per Q-SIG Route 23 30 MP (Internal PLO) Card 1 1 Port per DTI Card 24 32 Port per DCH Card 1 1
NEAX2000 IVS2 Q-SIG System ManualPage 12 ND-70923 (E), Issue 1.0 CHAPTER 1 GENERAL INFORMATION System conditions SYSTEM CONDITIONS Time Slot Assignment Condition As shown in Figure 1-7, the 30DTI/DCH card uses the time slot on the basic Highway 4. Therefore, the total number of time slots for all 30DTI/DCH cards must be 128 time slots or less including all other application processor cards, which use the Highway 4. The 24DTI/PRT card can use the time slot on both the basic and expanded Highway 4 and 6. Figure 1-7 Accommodation of DTI/DCH/ICH/BRT/PRT into TDSW PRT TDSW (1024 TIME SLOTS) FP0 FP1 FP2 FP3 DTI DCH FOR L/T CARDS: MAX. 512 TIME SLOTS PER SYSTEM FOR BASIC HIGHWAY4: MAX. 128 TIME SLOTS PER SYSTEM 1 TIME SLOT/CARD MAX. 128 TIME SLOTS MAX. 128 TIME SLOTS MAX. 128 TIME SLOTS MAX. 128 TIME SLOTS 30DTI: MAX. 31 TIME SLOTS/CARD BRT ICH DTI MAX. 2 TIME SLOTS/CARD (BRTA) MAX. 4 TIME SLOTS/CARD (2BRTC) 25 TIME SLOT/CARD 24DTI: MAX. 24 TIME SLOTS/CARD 1 TIME SLOT/CARD (SC02) 4 TIME SLOTS/CARD (SC03) FOR EXPANDED HIGHWAY6: MAX. 128 TIME SLOTS PER SYSTEM HW4 HW6 FOR AP CARDS: MAX. 256 TIME SLOTS PER SYSTEM
CHAPTER 1 GENERAL INFORMATION System conditions NEAX2000 IVS2 Q-SIG System Manual ND-70923 (E), Issue 1.0 Page 13 Time Slot Allocation for DTI/DCH Card On each DTI card, the system recognizes the lowest and highest channel numbers to which trunk numbers have been assigned, and allocates time slots to all the channels within them. If trunk numbers are assigned to discontinuous channels in this case, the system also allocates time slots to channels not assigned. For example, as shown in Figure 1-8, even when Channel 1 through Channel 10 have been assigned by the system data programming (CM07 YY=01) excepting Channel 5, the system allocates a total of 10 time slots for all the ten channels. Therefore, to avoid allocation of unnecessary time slots, it is recommended that consecutive channels are assigned on each DTI card. In the case of the DCH card, one time slot is allocated for setting up a fixed path between the DTI and the DCH by assigning Channel 16 of the DTI as the D Channel. Figure 1-8 Time Slot Allocation for DTI 10 9 6 5 4 1 CH0DXXX DXXX DXXX NONE DXXX DXXX NONELOWEST CHANNELHIGHEST CHANNEL 10 TIME SLOTS ARE ALLOCATED EVEN WHEN CH5 IS NOT ASSIGNED.