Advance Information
MT9074
Per Channel Receive Signalling (Pages 9 and 0AH) (E1)
Page 09H, addresses 10001 to 11111, and page 1AH addresses 10001 to 11111 contain the Receive
Signalling Control Words for CAS channels 2 to 16 and 18 to 32. Table 137 illustrates the mapping between the
addresses of these pages and the CAS channel numbers. Table 138 describes bit allocation within each of
these registers.
Page 9 Address:
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 11 12 13 14 15
10 11 12 13 14 15
Equivalent PCM 30
Timeslots
Page A Address:
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Equivalent PCM 30
Timeslots
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Table 136 - Page 9, A Address Mapping to CAS Channels (E1)
Bit
Name
- - -
Functional Description
Unused
7 - 4
3 - 0
A(n)
B(n)
C(n)
D(n)
Receive Signalling Bits for Channel n. These bits are received on the PCM 30
2048 kbit/sec. Link in bit positions one to four of time slot 16 in frame n (where n = 1
to 30) and are the A, B, C, D signalling bits associated with channel n.
Table 137 - Receive Channel Associated Signalling (Pages 9 and A) (E1)
Serial per channel receive signalling status bits appear on ST-BUS stream CSTo. Table 139 describes the bit
allocation within each of the 30 active ST-BUS time slot of CSTo.
Bit
Name
Functional Description
7 - 4
A(n),
B(n),
C(n),
D(n)
Transmit Signalling Bits for Channel n. These bits are transmitted on the PCM
30 2048 kbit/sec. Link in bit positions one to four of time slot 16 in frame n (where
n = 1 to 15), and are the A, B, C, D signalling bits associated with channel n.
3 - 0
A(n),
B(n),
C(n),
D(n)
Transmit Signalling Bits for Channel n. These bits are transmitted on the PCM
30 2048 kbit/sec. Link in bit positions one to four of time slot 16 in frame n (where
n = 1 to 15), and are the A, B, C, D signalling bits associated with channel n.
Table 138 - Receive CAS Channels (CSTo) (E1)
97
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