Ericsson CME 20 R6.1 - Page 189

Transmission Interface Handling G.703 2048 kbit/s
Table 22 Timeslot 0 and CRC-4 multiframe structure
Bit 1 to 8 of timeslot 0
Sub
multi
frame
Frame
number
1 2 3 4 5 6 7 8
0 c1 0 0 1 1 0 1 1
1 0 1 A Sa4 Sa5 Sa6 Sa7 Sa8
2 c2 0 0 1 1 0 1 1
3 0 1 A Sa4 Sa5 Sa6 Sa7 Sa8
1 4 c3 0 0 1 1 0 1 1
5 1 1 A Sa4 Sa5 Sa6 Sa7 Sa8
6 c4 0 0 1 1 0 1 1
7 0 1 A Sa4 Sa5 Sa6 Sa7 Sa8
8 cl 0 0 1 1 0 1 1
9 1 1 A Sa4 Sa5 Sa6 Sa7 Sa8
10 c2 0 0 1 1 0 1 1
2 11 1 1 A Sa4 Sa5 Sa6 Sa7 Sa8
12 c3 0 0 1 1 0 1 1
13 E 1 A Sa4 Sa5 Sa6 Sa7 Sa8
14 c4 0 0 1 1 0 1 1
15 E 1 A Sa4 Sa5 Sa6 Sa7 Sa8
CRC-4 Cyclic Redundancy Check (ITU-T G.704)
c1, c2, c3, c4 CRC-4 bits (see the section Layer 1
Termination 2048 kbit/s below)
A Alarm bit (see the section Layer 1
Termination 2048 kbit/s below)
E Error bit (see the section Layer 1
Termination 2048 kbit/s below)
Sa4, Sa5, Sa6, Sa7, Sa8 Spare bits (see the section Layer 1
Termination 2048 kbit/s below)
Downstream The path for information from the BSC to
the MS, see Figure 39 on page 189
Upstream The path for information from the MS to
the BSC, see Figure 39 on page 189
Linear Cascade Chain A cascade of RBS:s according to Figure
39 on page 189
188 (306)
EN/LZT 123 2697 R5A
1998-08-13
© Ericsson Radio Systems AB
— All Rights Reserved —