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NWA-008845-001 Rev.5.0
32ch1005.fm
Frame Configuration of 24DTI
According to the AT&T Specifications for 24-channel transmission, there are two types of frame config-
urations: 12-Multi Frame (D4) and 24-Multi Frame (ESF).
1. 12-Multi
Frame
This configuration has 12-Multi Frames, and each Multi frame has a 24-channel PCM signal (8 bits/
channel) and a S bit (Super Frame Bit). Figure below shows the frame configuration, and Table in
next page shows frame bit assignment.
DTI Frame Configuration (12-Multi Frame)
S
CH1
CH2
CH3
CH24
1 2 3 4 5 6 7 8 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
FRAME 12
125
µ
s
S: SUPERFRAME BIT
JULY/01/2006
DIRECT DIGITAL INTERFACE
DTI SPECIFICATIONS