NEC Neax 2000 Ivs2 Isdn System Manual

							 NEAX2000 IVS2 ISDN System ManualPage 20  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Outline of Event Based CCIS
Event Based CCIS Service Conditions
 Event Based CCIS connection is available between NEC NEAX PBXs.
 The maximum number of the virtual tie lines is 16 channels per one system, including both 
common signaling channels and voice channels.
 This feature suppor ts voice calls only. Suppor ted objects at PBX transmission side: single 
line telephone, D
term, DID/E&M/Ring Down (analog/T1/E1) tandem calls.
 The data calls are transmitted via the regular ISDN network.
 The number of originating calls from the ISDN trunk is counted as Peg Count when using 
the ISDN line for the virtual tie line by route basis.
 Billing information of the vir tual tie line using the ISDN line can be treated as regular tie line 
calls.
 Billing information of the virtual tie line using the ISDN line can be treated on tandem calls.
 The voice channel of the vi rtual tie line is released after the call is finished.
The common signaling channel of vir tual tie line is released after all calls on voice channels 
are finished. The release timer is determined by system timer programming for the voice 
channels and the common signaling channels.
 The ISDN line used for the virtual tie line can also be used as a regular ISDN line.
The trunk route used for the virtual tie line can be distinguished from the regular ISDN line 
by assigning different LCR data in system programming. 
						

							CHAPTER 1  GENERAL INFORMATION
Card Name and Function
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 21
CARD NAME AND FUNCTION
Table 1-2 shows the circuit card names and function for ISDN.
Table 1-2  ISDN Card Name and Function
CARD NAMEFUNCTIONAL 
NAMEFUNCTION
PN-BRTA BRT 1-line Basic Rate (2B + D) Interface Trunk Card
Accommodates one 2-channel PCM digital lines
PN-2BRTC BRT 2-line Basic Rate (2B + D) Interface Trunk Card
Accommodates two 2-channel PCM digital lines
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
PN-2ILCA ILC 2-line ISDN Line Circuit Card
Provides a physical interface to ISDN Terminals
Occupies 8 time slots per one card
PN-24PRTA PRT ISDN Primary Rate (23B + D) Interface Card
Provided a built-in D-channel Handler (DCH)
PN-SC00 CCH Common Channel Handler Card
Transmits/receives signals on the common signaling 
channel of No. 7 CCIS
PN-SC01 DCH D-channel Handler Card
Transmits/receives signals on the D-channel of ISDN 
Primary Rate (23B + D) interface or WCS Roaming 
interface
PN-SC03 ICH ISDN-channel Handler Card
Provides the D-channel signaling interface and controls 
max. four ILC cards (Layers 2 and 3) 
						

							 NEAX2000 IVS2 ISDN System ManualPage 22  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
System Capacity
SYSTEM CAPACITY
System Capacity for ISDN-PRI
Table 1-3  System Capacity for ISDN-PRI
DESCRIPTIONCAPACITY
24DTI 24PRT 30DTI
DTI Card 8 – 4
DCH Card 8 – 4
Trunks for DTI 192 – 124
PRT Card – 8 –
Trunks for PRT – 192 –
ISDN Routes 8 8 4
ICH Card 12 12 12
ILC Card 48 48 48
Port per DTI Card 24 – 32
Port per DCH Card 1 – 1
Por t per PRT Card – 24 + 1 (DCH) –
Port per ICH Card 4 4 4
Port per ILC Card 8 8 8 
						

							CHAPTER 1  GENERAL INFORMATION
System Capacity
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 23
System Capacity for ISDN-BRI
Table 1-4  System Capacity for ISDN-BRI
DESCRIPTION CAPACITY
BRT Card (BRTA/2BRTC) 12/24
Trunks for BRT (BRTA/2BRTC) 24/96
ICH Card 12
ILC Card 48
Port per BRT Card (BRTA/2BRTC) 2/4
Port per ICH Card 4
Port per ILC Card 8 
						

							 NEAX2000 IVS2 ISDN System ManualPage 24  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
System Conditions
SYSTEM CONDITIONS
Time Slot Assignment Condition
As shown in Figure 1-10, the 30DTI/DCH/ICH/BRT card uses the time slot on the basic Highway
4. Therefore, the total number of time slots for all 30DTI/DCH/ICH/BRT cards must be 128 time
slots or less including all other application processor cards, which use Highway 4.
The 24DTI/PRT card can use the time slot on both the basic and expanded Highway 4 and 6.
Therefore, the total number of time slots for all 24DTI/PRT cards must be 256 time slots or less.
Figure 1-10  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 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 25
Time Slot Allocation for DTI/PRT/DCH Card
On each DTI/PRT 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, in Figure 1-11, even when Channel 1 through Channel 10 have been assigned by
the system data programming (CM07 YY=01) except Channel 5, the system allocates a total of
10 time slots for all 10 channels. Therefore, to avoid allocation of unnecessary time slots, it is
recommended that consecutive channels are assigned on each DTI/PRT 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 1-11  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. 
						

							 NEAX2000 IVS2 ISDN System ManualPage 26  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
System Conditions
Line Distance Between PBX and NT1/ISDN Terminal
Figure 1-12 shows the line distance between PBX and NT1 and the line distance between PBX
and ISDN Terminal.
Figure 1-12  Line Distance Between PBX and NT1/ISDN Terminal
NOTE 1:The line distance marked by * shows the value when the 0.5φ twisted-pair cable
is used.
NOTE 2:The line distance marked by ** shows the value when the 0.65
φ twisted-pair cable
is used.
ILC(A)
ILC(B)
ILC(C)No. 1  – No. 8
No. 1  – No. 8
Max. 400 m
Max. 600 m 
Max. 150 mPBX
BRTNT1TO ISDN
Max. 1000 m
: ISDN Terminal
NT1 : Network Termination One
(A) : Point to Point Connection
(B) : Point to Multipoints Connection 
(Extended Passive Bus)
(C) : Point to Multipoints Connection (Short 
Distance Passive Bus)
MDF
Max. 50 m
DTI/PRTNT1TO ISDN
Max. 200 m (1965 ft.*)
(164 ft.*)
(1310 ft.*)
(491 ft.*)(655 ft.**) (3280 ft.*) 
						

							CHAPTER 1  GENERAL INFORMATION
DTI Specifications
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 27
DTI SPECIFICATIONS
Transmission Characteristics
Table 1-5  Transmission Characteristics 
CHARACTERISTICS 24-CHANNEL 30-CHANNEL
(1) Output
 Line Rate 
 Line Code 
 Line Impedance 
 Pulse Amplitude
(Base to Peak) 
 Pulse Width 1.544 Mbps ± 50 ppm 
AMI with ZCS/B8ZS* 
100 ohms 
3 volts ± 0.6 volts 
324 ns ± 30 ns   2.048 Mbps ± 50 ppm   
HDB3 (High Density Bipolar 3) 
 
75 ohms 
(Coaxial Cable)
120 ohms 
(Twisted-Pair Cable)   
2.37 volts nominal
(Coaxial Cable)
3 volts nominal 
(Twisted-Pair Cable)   
244 ns nominal   
* AMI : Alternate Mark Inversion
ZCS : Zero Code Suppression
B8ZS : Bipolar Eight Zero Substitution 
						

							 NEAX2000 IVS2 ISDN System ManualPage 28  ND-70919 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
DTI Specifications
(2) Input 
 Line Rate 
 Pulse Amplitude
(Base to Peak) 
 Frame Synchronization Pattern 
 
 Input Jitter 
 Wander 
 Cable Length from PBX to NT11.544 Mbps ± 200 bps 
(130 ppm)   
1.5 volts – 3 volts   
001011 (24MF)
ITU-T Fig. 1/G743   
+138U1, –193UI 
or 
–138UI, +193UI   
Max. 200 m (655 ft.)
(with 0.65
φ (22 ABAM) 
twisted-pair cable)2.048 Mbps ± 50 ppm   
1.5 volts – 2.7 volts
(Coaxial Cable)
1.5 volts – 3.3 volts 
(Twisted-Pair Cable)   
ITU-T Fig. 1/G743   
ITU-T G823   
Max. 400 m 
(with 0.65φ twisted-pair cable)
Table 1-5  Transmission Characteristics (Continued)
CHARACTERISTICS 24-CHANNEL 30-CHANNEL 
						

							CHAPTER 1  GENERAL INFORMATION
DTI Specifications
NEAX2000 IVS2 ISDN System Manual    
ND-70919 (E), Issue 1.0   Page 29
Frame Configuration of 24DTI
According to the AT&T Specifications for 24-Channel transmission, there are two types of frame
configurations: 12-Multi Frame and 24-Multi Frame.
(1) 12-Multi Frame
The frame has 12-Multi Frames, and each Multi frame has a 24-Channel PCM signal (8 bits/
channel) and an S bit (Superframe Bit). Figure 1-13 shows the frame configuration, and 
Ta b l e  1 - 6 shows frame bit assignment.
Figure 1-13  DTI Frame Configuration (12-Multi Frame)
SCH1
112345678 12345678CH2
12 3 45 6 78CH3
12345678CH24
125 ms
S: Superframe Bit
FRAME 1 FRAME 2 FRAME 3 FRAME 12