NEC Neax 2000 Ivs2 Data Interface System Manual

							NEAX2000 IVS2 Data Interface System Manual    
ND-70924 (E), Issue 1.0   Page 3
CHAPTER 1
GENERAL INFORMATION
This chapter explains the Data Interface system outline, the name and
functions of circuit cards required, system capacity, specifications,
and conditions. 
						

							 NEAX2000 IVS2 Data Interface System ManualPage 4  ND-70924 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Outline
SYSTEM OUTLINE
The Data Interface can provide the intra- or inter-office digital data transmission on fixed path
(Nailed-Down) connection. The Data Interface equips the V.11 (X.21) and the V.24/V.28
(RS-232C) interface. When you use the V.11 (X.21) interface, a maximum of 64 kbps digital data
transmission is available. When you use the V.24/V.28 (RS-232C) interface, a maximum of 19.2
kbps digital data transmission is available.
To add the V.11 (X.21) or V.24/V.28 (RS-232C) Data Interface to the system, it is necessary to
install the Data Port Controller (DPC) card. You can provide the V.35 interface DTE by the M03
card installed in addition to the DPC card. The M03 card converts the V.11 (X.21) interface to a
V.35 interface. When you provide the inter-office digital data transmission, it is necessary to
install the 24/30-channel Digital Trunk Interface (DTI) card in addition to the DPC card.
Figure 1-1 and Figure 1-2 show the outline of the Data Interface intra-office/inter-office
connection.
Figure 1-1  System Outline of Intra-Office Data Connection
NOTE:The DPC card can only operate as DCE. If the DPC card is to be connected to a modem
or other DCE, a null modem adapter is required.
SYNCHRONOUS 
DATA AT SPEEDS 
OF 56 kbps, 64 kbps
PBX
DTE
DTE
DPC DPC
NAILED-DOWN CONNECTION
(DATA STATION TO DATA STATION)
DPC: DATA PORT CONTROLLER
DTE : DATA TERMINAL EQUIPMENT 
						

							CHAPTER 1 GENERAL INFORMATION
System Outline
NEAX2000 IVS2 Data Interface System Manual    
ND-70924 (E), Issue 1.0   Page 5
When the PBX is an end office in the Inter-Office Digital Data Transmission through Nailed-Down
Connection, the digital signal is transmitted directly. A maximum of 64 kbps digital data
transmission is available for the direct digital transmission.
When the PBX is a tandem office in the Inter-Office Digital Data Transmission through Nailed-
Down Connection, data transparency is provided, and a maximum of 64 kbps digital data
transmission is available.
Table 1-1 shows the connecting pattern of the Inter-Office Data Transmission through Nailed-
Down Connection.
 : Direct Connection
   : Tandem Connection
    — : Not available
Table 1-1  Connecting Patterns
CONNECTING PATTERN
SYSTEM 
CONFIGURATION TO
FROMLDT/ODTDTI 
(DIGITAL SIGNAL)
DPC —Figure 1-2
LDT/ODT — —
DTI 
(Digital Signal)—Figure 1-2 
						

							 NEAX2000 IVS2 Data Interface System ManualPage 6  ND-70924 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Outline
Figure 1-2  System Outline of Inter-Office Data Connection
DTI PBX (2)  PBX IS A NTANDEM OFFICE:
DTI
PBX
DTE
DPC DPC
DPC : DATA PORT CONTROLLER
DTE : DATA TERMINAL EQUIPMENT
DTI : 24/30 CHANNEL DIGITAL TRUNK INTERFACE
M: MODEM
PLO : PHASE LOCKED OSCILLATOR
DTE
DPC
MM TO
DTE
DTI
MPPLO
NAILED-DOWN CONNECTION
24/30 CHANNEL PCM
DIGITAL LINE
DIGITAL
PBX
CLOCK SIGNAL
TDSW (1)  PBX IS AN END OFFICE:
NAILED-DOWN CONNECTION
MPPLOCLOCK SIGNAL
TDSW 
						

							CHAPTER 1 GENERAL INFORMATION
System Outline
NEAX2000 IVS2 Data Interface System Manual    
ND-70924 (E), Issue 1.0   Page 7
DPC
The Data Port Controller (DPC) can accommodate a maximum of two DTE per cards with V.11
(X.21) or V.24/V.28 (RS-232C) interface, and can provide the intra-office or inter-office digital
data transmission on Nailed-Down connection.
DTI
The Digital Trunk Interface (DTI) interfaces the PBX directly to a 24/30-channel PCM
transmission line. The DTI has the following functions.
For 24DTI:
 Unipolar/Bipolar Conversion (AMI Format)
 Signaling Insertion/Extraction
 Alarm Detection/Insertion
 Digital PAD on Voice Signal Transmission
 Loopback Test (Local/Remote Loopback)
 Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For 30DTI:
 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. 0421 Digital R2 Signaling Code)
For connection of a 24DTI and transmission line, twisted-pair cables can be used. For connection
of a 30DTI and transmission line, either coaxial cable or twisted pair cable can be used.
M03
The M03 provides V.35 Data Terminal Equipment interface.
M03 is connected to the DPC and converts V.11 (X.21) interface to V.35 interface. 
						

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CHAPTER 1 GENERAL INFORMATION
System Outline
PLO
The Phase Locked Oscillator (PLO) equipped on the MP card synchronizes the system to the
digital network clock.
When the PBX is a clock receiver office, the PLO generates the clock signals according to the
source clocks received from the source office within the 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 from the source office, and the other is a standby Route 1 from a sub-source office. When no
clock signals arrive from the source and sub-source office, due to a transmission line failure, the
PLO keeps generating the clock signals at the frequency of the previous source clock. The PLO
can receive different frequency of source clocks from the Route 0 and Route 1.
Figure 1-3 shows an example of the clock supply route when the system is a receiver office.
Figure 1-3  Clock Supply Route
NOTE:DTI 0 and DTI 1 must be mounted in PIM0.
PLO
TDSW SOURCE OFFICE
~ SOURCE
CLOCK
RECEIVER/LOCAL-RECEIVER OFFICE
DTI
DTI TDSW
RECEIVER OFFICE
DTI
DTI
DTI TDSW
SUB-SOURCE OFFICE
PLO
DTI
DTI 1
DTI 0DTI
DTI
PLO
PLO: DIRECTION OF CLOCK
SIGNAL SUPPLY
TDSW
PBX NOTE 
						

							CHAPTER 1 GENERAL INFORMATION
Card Name and Function
NEAX2000 IVS2 Data Interface System Manual    
ND-70924 (E), Issue 1.0   Page 9
CARD NAME AND FUNCTION
Table 1-2 shows the circuit card name and function for Data Interface.
Table 1-2  Card Name and Function 
EQUIPMENT
NAMEFUNCTIONAL
NAMEFUNCTION
PN-CP14 MP Main Processor Card
Provides Memory, TDSW (1024CH × 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-24DTA-C DTI Digital Trunk Interface (23B + D, 1.5 Mbps) Card
Accommodates 24-channel PCM digital lines.
PN-30DTC-A DTI Digital Trunk Interface (2 Mbps) Card
Accommodates 30-channel PCM digital lines.
PZ-M542
[For Other 
Countries]CONN Coaxial Cable Connection Card
Used to connect a coaxial cable for the Digital Trunk 
Interface.
Two cards maximum 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.
Two cards maximum can be connected to LTC connector 
of each PIM. 
						

							 NEAX2000 IVS2 Data Interface System ManualPage 10  ND-70924 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
Card Name and Function
PN-2DPCB DPC 2-line Data Port Controller Card
Used for the intra-office or inter-office digital data 
transmission on nailed down connection.
Accommodates max. two DTEs with V.11 (X.21) interface 
or V.24/V.28 (RS-232C) interface.
PN-M03 M03 V.35 Data Terminal Equipment Interface Card
Used together with the PN-2DPCB card to provide the 
V.35 interface.
Table 1-2  Card Name and Function (Continued)
EQUIPMENT
NAMEFUNCTIONAL
NAMEFUNCTION 
						

							CHAPTER 1 GENERAL INFORMATION
System Capacity
NEAX2000 IVS2 Data Interface System Manual    
ND-70924 (E), Issue 1.0   Page 11
SYSTEM CAPACITY
System Capacity for Data Interface
System Capacity for Digital Trunk Interface
Table 1-3  System Capacity for Data Interface
DESCRIPTION CAPACITY REMARKS
DPC Card 50
Circuits per DPC Card 2
Fixed Path Connection 100
Table 1-4  System Capacity for Digital Trunk Interface
DESCRIPTIONCAPACITY
REMARKS
24DTI 30DTI
DTI Card 8 4
DTI Trunk 192 124
DTI Trunk Route 64 64 1 Route/DTI
Ports per DTI Card 24 31 
						

							 NEAX2000 IVS2 Data Interface System ManualPage 12  ND-70924 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Specifications
SYSTEM SPECIFICATIONS
DPC Specifications
NOTE 1:When the transmission rate is 56 or 64 kbps, only full duplex is available.
NOTE 2:For the transmission rate after Rate Adaptation, see Table 1-6.
Modem Specifications
NOTE:When the transmission rate is 56 or 64 kbps, only full duplex is available.
Table 1-5  DPC Specifications
DESCRIPTION SPECIFICATION
Synchronization Synchronous
Transmission Rate 2.4, 4.8, 9.6, 14.4, 19.2, 48, 56, 64 kbps
Transmission Mode Full/Half Duplex NOTE 1
Rate Adaptation NOTE 2ITU-T V.110
Table 1-6  Rate Adaptation
TRANSMISSION RATE
BEFORE RATE ADAPTATIONTRANSMISSION RATE
AFTER RATE ADAPTATIONREMARKS
2.4-4.8 kbps 8 kbps
9.6 kbps 16 kbps
14.4 kbps 32 kbps
19.2 kbps 32 kbps
48-64 kbps 64 kbps
Table 1-7  Modem Specifications
DESCRIPTION SPECIFICATION
Synchronization Synchronous
Transmission Rate 2.4, 4.8, 9.6, 14.4, 19.2, 48, 56, 64 kbps
Transmission Mode Full/Half Duplex NOTE
Line 4 wire
Connecting Type Leased