NEC Neax 2000 Ivs2 Ccis System Manual

 NEAX2000 IVS2 CCIS System ManualPage 18  ND-70918 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
Time Slot Allocation for DTI Card
On each DTI card, the system recognizes the lowest and highest channel numbers to which trunk
numbers are assigned, and allocates time slots to all the channels between them. If trunk
numbers are assigned to nonconsecutive channels, the system also allocates time slots to
channels not assigned.
For example, as shown in Figure 1-7, when Channel 1...

CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 19
Number of Time Slots Required for DTI/CCH Card
(1) When the system is serving as a Lower Hierarchy Office within the network, 1 time slot is 
allocated for setting up a fixed path between the DTI/ODT and the CCH as the common 
signaling channel.
(2) When the system is serving as a High Hierarchy Office within the network, 1 time slot is 
allocated to the distant Main Office...

 NEAX2000 IVS2 CCIS System ManualPage 20  ND-70918 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
Figure 1-8 shows the CCH time slot assignment for CCIS with Digital Interface.
Figure 1-8  CCH Time Slot Assignment (for No. 7 CCIS with Digital Interface)
A
B
CM
TDSW
DTI
CCH
AP00
MP
TDSW
DTI
CCH
AP00
DTI
CCH
DTI
CCH
DTI
CCH
MPM: Main Office
D : Local Office (High Hierarchy Office)
A, B, C: Local Office (Low Hierarchy Office)
To Local Office D
(1 time slot)
To Main Office M
(1...

CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 21
Figure 1-9 shows the CCH time slot assignment for No. 7 CCIS with Analog Interface.
Figure 1-9  CCH Time Slot Assignment (for No. 7 CCIS with Analog Interface)
TDSW
TDSWM: Main Office
D : Local Office (High Hierarchy Office)
A, B, C: Local Office (Low Hierarchy Office)
  Network Configuration:

  When the System locates at A, B, or C (Low Hierarchy Office) in the above...

 NEAX2000 IVS2 CCIS System ManualPage 22  ND-70918 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
Table 1-4 shows the number of time slots for each of the cards required for No. 7 CCIS with Digital
Interface and Ta b l e  1 - 5 shows the number of time slots for each of the cards required for No. 7
CCIS with Analog Interface.
Table 1-4  Number of Time Slots Required per DTI/CCH/AP00 Card 
(for No. 7 CCIS with Digital Interface)
CARDNUMBER OF TIME 
SLOTS PER CARDREMARKS...

CHAPTER 1  GENERAL INFORMATION
Time Slot Assignment Condition
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 23
Table 1-5  Number of Time Slots Required per CCH/AP00 Card
(for No. 7 CCIS with Analog Interface)
CARDNUMBER OF TIME 
SLOTS PER CARDREMARKS
PN-SC00
1  For a distant Main Office
–  Common Signaling Channel: 1 time slot
1  For a distant Local Office
–  Common Signaling Channel: 1 time slot
PN-AP00-B0 

 NEAX2000 IVS2 CCIS System ManualPage 24  ND-70918 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
DTI Specifications
DTI SPECIFICATIONS
Transmission Characteristics
Table 1-6  Transmission Characteristics
CHARACTERISTICS 24-CHANNEL 30-CHANNEL
(1) Output
 Line Rate 1.544 Mbps ±50 ppm 2.048 Mbps ±50 ppm
 Line Code  AMI with ZCS/B8ZS* HDB3 (High Density Bipolar 3)
 Line Impedance 100 ohms 75 ohms + 100 µH
(Coaxial Cable)
120 ohms + 160 µH
(Twisted-Pair Cable)
 Pulse Amplitude 
(Base to Peak)3 volts ±0.6...

CHAPTER 1  GENERAL INFORMATION
DTI Specifications
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 25
Frame Configuration of 24-DTI
According to the AT&T Specifications for 24-channel transmission, there are two types of frame
configurations: 12-Multi Frame (D4) and 24-Multi Frame (ESF).
(1) 12-Multi Frame (D4)
The frame has 12-Multi Frames, and each Multi frame has a 24-channel PCM signal (8 bits/
channel) and an S bit (Super Frame Bit). Figure 1-10 shows the frame configuration, and...

 NEAX2000 IVS2 CCIS System ManualPage 26  ND-70918 (E), Issue 1.0
CHAPTER 1  GENERAL INFORMATION
DTI Specifications
* The S-bit is the first bit in each frame.
* Frames are repeated in the order shown above.
* Frames 6 and 12 become signal frames.
Table 1-7  12-Multi Frame Bit Assignment
FRAME
No.S BITBIT No. OF EACH 
CHANNEL
(CH1-CH12)
SIGNAL
CHANNEL
TERMINAL
SYNCHRONIZATION
(FT)SIGNAL
SYNCHRONIZATION
(FS)INFORMATION
SIGNAL BITCONTROL
SIGNAL BIT
11 1-8
201-8
30 1-8
401-8
51 1-8
611-78A
70 1-8
811-8
91...

CHAPTER 1  GENERAL INFORMATION
DTI Specifications
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 27
(2) 24-Multi Frame (Extended Super Frame )
This frame has 24-Multi Frames and each Multi frame has a 24-Channel PCM signal (8 bits/
channel) and an S bit (Super Frame Bit). Figure 1-11 shows the frame configuration, and 
Ta b l e  1 - 8 shows frame bit assignment.
Figure 1-11  Frame Configuration of 24-DTI (24-Multi Frame)
TS0 TS1 TS2 TS15 TS16 TS17 TS30 TS31
FRAME 0 FRAME 1 FRAME 2...