NEC NEAX 2000 IPS - MODEM Specifications

CHAPTER 1 GENERAL INFORMATION
– 36 – NWA-008853-001 Rev.3.0
97ch1001.fm
Time Slot Assignment of 30DTI
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
b
0
x1101100
b
654321
7
FAS
CRC BIT
b
0
x11111x1
b
654321
7
REMOTE ALARM
CRC BIT
0: NORMAL
1: FRAME LOSS
DTI SPECIFICATIONS