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2-28 Hardware Description
Vanguard 6455 Option Cards
DIMs The SDB4 Option Card supports DIMs that allow the rear panel connectors to
function as V.11, V24, V.35, or V.36 ports. Depending on how the DIMs are placed,
the ports act as DTE or DCE. Refer to Figure 2-35 for details.
DIM DIP Switches Depending on the type of DIM, the DIP switches on the SDB4 card must have either
of two settings shown in Figure 2-35 and in this table:
Test Mode Switch This table shows the SDB4 Test Mode Switch settings:
Switch Number V.11, V.35, V.36, DSU V.24
1Off On
2Off On
3Off On
4Off On
5Off On
6On Off
7On Off
8On Off
Switch No./Name On Off
1: Port 2 RI/TM Pin 22 is input on Port 2. Pin 22 is output on Port 2.
2: Port 2 MB Pin 25 is input on Port 2. Pin 25 is output on Port 2.
3: Port 3 RI/TM Pin 22 is input on Port 3. Pin 22 is output on Port 3.
4: Port 3 MB Pin 25 is input on Port 3. Pin 25 is output on Port 3.
5: Port 0 RI/TM Pin 22 is input on Port 0. Pin 22 is output on Port 0.
6: Port 0 MB Pin 25 is input on Port 0. Pin 25 is output on Port 0.
7: Port 1 RI/TM Pin 22 is input on Port 1. Pin 22 is output on Port 1.
8: Port 1 MB Pin 25 is input on Port 1. Pin 25 is output on Port 1.