NEC NEAX 2000 - Page 226

DIRECT DIGITAL INTERFACE (DDI)
DTI SPECIFICATIONS
– 206 –
A2195-10
Time Slot Assignment of 30-DTI
TIME SLOT No. EVEN No. FRAME ODD No. FRAME
TS0 Frame Alignment Signal (FAS)
TS1-TS15 Voice Channel
CH1-CH15
TS16 • Associated Channel Signaling:
TS17-TS31 Voice Channel
CH17-CH31
X 0 0 1 1 0 1 1
FAS
b
0 1 2 3 4 5 6
b
7
CRC BIT
X 1 1 1 1 1 1
b
0 1 2 3 4 5 6
b
7
CRC BIT 0: NORMAL
1: FRAME LOSS
REMOTE ALARM
X
0 0 0 1 X 1 1
b
0 1 2 3 4 5 6
b
7
Xa 0 1 0 1
b
0 1 2 3 4 5 6
b
7
Xa 0 1 0 1
b
0 1 2 3 4 5 6
b
7
0
Xb Xa Xb
Xb Xa Xb
MULTI FRAME
ALIGNMENT SIGNAL
(MAS)
REMOTE MULTI ALARM
0: NORMAL
1: MULTI FRAME LOSS
FRAME 0
FRAME 1
FRAME 15
SIGNALING DATA
OF CH1
SIGNALING DATA
OF CH16
SIGNALING DATA
OF CH15
SIGNALING DATA
OF CH30
SIGNALING DATA OF
EACH VOICE CHANNEL