Chapter 1 CCIS FEATURES
1-16
NWA-088654-001 Rev.1.0
94ch1001.fm
CCT SPECIFICATIONS
Time Slot Assignment of 30CCT
MODEM Specifications
The MODEM specifications required for No. 7 CCIS with Analog Interface are shown below.
• Synchronization
: Synchronous
• Data speed
: 1200 bps-9600 bps
• Transmission Mode : Full Duplex
• Line
: 2/4 wire (Common Signaling Data Link via MODEM)
• Connection Type
: Leased
• Interface Condition : ITU-T V24 and V28
TIME SLOT
No.
EVEN No. FRAME
ODD No. FRAME
TS0
Frame Alignment Signal (FAS)
TS1-TS15
Voice Channel
CH1-CH15
TS16
• No. 7 CCIS:
To be used as a Common Signaling Data Channel
TS17-TS31
Voice Channel
CH17-CH31
b0
x
1
1
0
1
1
0
0
b
6
5
4
3
2
1
7
FAS
CRC BIT
b0
x
1
1
1
1
1
x
1
b
6
5
4
3
2
1
7
REMOTE ALARM
CRC BIT 0: NORMAL
1: FRAME LOSS