Frame Configuration Of 24Cct - NEC UNIVERGE SV9300 Networking Manual

Frame Configuration of 24CCT

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 (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). This figure shows the frame configuration, and the table on next page
shows frame bit assignment.
Frame Configuration of 24CCT (12-Multi Frame)
CH1
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
125 µs
CH2 CH3
FRAME 2 FRAME 3
S: SUPERFRAME BIT
1-11
Chapter 1 CCIS FEATURES
CCT SPECIFICATIONS
CH24
1 2 3 4 5 6 7 8
FRAME 12
NWA-088654-001 Rev.1.0
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