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16-1
POWER TERMINATION MODULE (PTM)
SECTION 16 POWER TERMINATION MODULE (PTM)
16.1 DESCRIPTION
The Power Termination Module (PTM) provides
loading of the Data Communication Busses (DCB)
and PCM busses for each shelf. The PTM also
provides each shelf with fuse protection for supply
voltages.
16.2 SETUP PROCEDURE
Table 16-1 S5/S7 SWITCH TERMINATION
SETTINGS
S5 - IDB Data (37.5 ohms)
S7 - CSB Data (37.5 ohms)
Number of Shelves Switch Sections Closed
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
ALL
1,3,6,7
1
2,4,5,6,7
2,5,6,7
2,7
3,4,5,6,7
3,4,6,7
3,4
3,5,6
3,5
3,6
3,7
3
4,5,6,7
4,5,6,7
4,5,6
4,5,7
4,5
4,5
4,6,7
4,6,7
4,6
Table 16-2 S6/S8 SWITCH TERMINATION
SETTINGS
S6 - IDB Idle (100 ohms)
S8 - CSB Idle (100 ohms)
Number of Shelves Switch Sections Closed
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
8
4,5,7
1,2,6
5,6
2,5,6
1,3,6
6
2,3,4,5
1,2,4,5
4,5
1,2,4,5
1,4,5
1,2,5
1,2,5
2,5
5
5
1,2,3,4
1,2,3,4
1,2,3,4
3,4
3,4