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Hardware Description 2-27
Vanguard 6455 Option Cards
SDB4 Option Card
Description The SDB4 Option Card shown in Figure 2-35 is an optional card for the Vanguard
6455 that provides four high speed Sync/Async ports. The card can plug into either
or both Option Card slots in the Vanguard 6455 chassis.
Figure 2-35. SDB4 Option Card
The SDB4 has four DIM-selectable serial sync/async I/O ports. There are two 50 pin
connectors on the SDB4 back panel. Two Y-Adapter Cables (one for each 50-pin
connector on the back panel) break out into four DB-25 connectors, which allow for
standard connection, via cables, to other equipment.
The Vanguard 6455 Option Card differs from the existing Vanguard Daughtercards
as follows:
• Supports processor(s) and a high-speed bus interface to the motherboard.
• Supports large cards (4.75 x 12 inches) for external device connection.
Port Description The SDB4 ports have these characteristics:
• Data Rates up to 2.048 Mbps
• MC68360 processor
• DIM support (Configuration is factory set as specified by your sales order.)
-V.11 DIM
- V.24 DIM
- V.35 DIM
- V.36 DIM High Speed
Switch Settings For Switch 5
(Test Mode Switch)
Ports 2, 3
P1/P2
Ports 0, 1
P1/P2
SW5
Port 2Port 3Port 0Port 1
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
Switch Settings
for V.11, V.35, V.36, DSU
(Ports 0, 1, 2, 3)
Switch Settings
for V.24
(Ports 0, 1, 2, 3)
P2
RI
P3
MB
RI
MB
RI
MB
RI
MB
P0
P1