MT9072 Zarlink Semiconductor, Inc., MT9072 Datasheet - Page 43

• Manufacturer Part Number: MT9072
• Description: Octal T1-E1-J1 Framer
• Manufacturer: Zarlink Semiconductor, Inc.

Advance Information
Tables 4 and 5 show the mapping between the ST-BUS channels and the PCM30 timeslots.
When the device is in IMA (Inverse Mux for ATM) mode the mapping between the ST-BUS Channels and the
PCM30 timeslots is according to Table 4.
PCM30 timeslot 0 is reserved for basic frame alignment, CRC-4 multiframe alignment and the communication
of maintenance information (facility data link). In most configurations timeslot 16 is reserved for either Channel
Associated Signaling (CAS or ABCD bit signaling) or Common Channel Signaling (CCS). For V5.2
applications, timeslots 15, 16 and 31 may be used for CCS. The remaining timeslots are called channels and
carry either PCM encoded voice signals or digital data. Channel alignment and bit numbering is consistent with
timeslot alignment and bit numbering. However, channels are numbered 1 to 30 and relate to timeslots as per
Table 6.
PCM30 Timeslots
ST-BUS Channels
(DSTi/o and CSTi/o)
PCM30 Timeslots
ST-BUS Channels
(DSTi/o and CSTi/o)
PCM30 Timeslots
ST-BUS
Chan(DSTi/o F1/5
and CSTi/o) F2/6
PCM30 Timeslots
ST-BUS
Chan(DSTi/o F1/5
and CSTi/o) F2/6
Table 5 - ST-BUS Channel vs. PCM30 Timeslot Relationship for 8.192 Mbit/s DST/CST Streams (E1)
PCM30 Voice/Data
PCM30 Timeslot
Table 4 - ST-BUS Channel vs. PCM30 Timeslot for 2.048 Mbit/s DST/CST Streams (E1)
Channels
F0/4
F3/7
F0/4
F3/7
Table 6 - PCM30 Timeslot to PCM30 Channel Relationship (E1)
16
64
65
66
67
0
0
1
2
3
17
68
69
70
71
1
4
5
6
7
16
16
0
0
10
18
72
73
74
75
11
2
8
9
0
x
17
17
1
1
12
13
14
15
19
76
77
78
79
3
18
18
2
2
16
17
18
19
20
80
81
82
83
4
19
19
3
3
20
21
22
23
21
84
85
86
87
5
1 2 3...15
1 2 3...15
20
20
4
4
24
25
26
27
88
89
90
91
22
6
21
21
5
5
28
29
30
31
23
92
93
94
95
7
22
22
6
6
32
33
34
35
24
96
97
98
99
8
23
23
7
7
100
101
102
103
36
37
38
39
25
24
24
9
8
8
16
x
104
105
106
107
25
25
10
40
41
42
43
26
9
9
10
10
26
26
108
109
110
111
11
44
45
46
47
27
11
11
27
27
112
113
114
115
17 18 19...31
16 17 18...30
12
48
49
50
51
28
12
12
28
28
116
117
118
119
13
52
53
54
55
29
MT9072
13
13
29
29
120
121
122
123
14
56
57
58
59
30
14
14
30
30
124
125
126
127
15
15
31
31
15
60
61
62
63
31
43