Nortel Circuit Card Installation Manual page 135

Figure 20
NT8D72 DIP switch settings
NT8D72AA, NT8D72AB
75 ohm switch setting
OFF
ON
NT8D72BA
75 ohm switch setting
OFF
ON
1 2
S1 S2
1 2
S1 S2
Option settings
120 ohm switch setting (default)
or
1
S1
120 ohm switch setting (default)
or
1
S1
Circuit Card
Page 135 of 906
OFF
ON
2
S2
OFF
ON
2
S2
553-7463
Description and Installation