NEC ND-70919 system manual Frame Configuration of 24DTI, DTI Frame Configuration 12-Multi Frame

CHAPTER 1 GENERAL INFORMATION

DTI Specifications

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 1-13shows the frame configuration, and Table 1-6shows frame bit assignment.

Figure 1-13 DTI Frame Configuration (12-Multi Frame)

CH1 CH2 CH3

S

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

FRAME 1 FRAME 2 FRAME 3

125 ms

CH24

1 2 3 4 5 6 7 8

FRAME 12

S: Superframe Bit

NEAX2000 IVS2 ISDN System Manual	Page 29
ND-70919 (E), Issue 1.0