Northern Telecom BCS35 Replacement Manual page 77

Figure 6–4
Quad SIO (A6 and B6) circuit pack (NT6M60BA) baud rate selector switches
B C
D
A
E
F
9
0
8
1
7
6 2
5
3
4
B C
D
A
E
F
9
0
8
1
7
6 2
5
3
4
B C
D
A
E
F
9
0
8
1
7
6 2
5
3
4
B C
D
A
E
F
9
0
8
1
7
6 2
5
3
4
Note: 1. S2 (polling modem) is inactive if 56K polling is
used.
2. This circuit pack supports polling on digital data
lines or on an analog network.
Quad SIO printed circuit assembly in slots
A1A1A6 and A1A2A6
S5 printer port (ROVER or EAT)
S4 MMI link 2
S3 MMI link 1
S2 BX.25 polling link
DPP Card Replacement Guide BCS35 and up
QSIO circuit pack 61