4–6 Site Preparation and Maintenance
4.2 Cable Connections
The following table describes the cable connections that are compatible with the
DECserver 700 Ethernet and serial line connectors. Wiring diagrams of individual
cables are provided for use in troubleshooting and cable building.
Table 4–1: Cable Connections
Cable Type Description
10BaseT Ethernet Cable The 10BaseT Ethernet cable uses a 8-pin
modular plug on each end.
BC17D Shielded Null-Modem Cable The BC17D is a 10-wire cable with a 25-pin
D-connector on each end. Can be used with
DECserver 700-8.
BC22D Shielded Null-Modem Cable The BC22D is a 6-wire cable with a 25-pin
D-connector on each end. Can be used with
DECserver 700-8.
BC22E/F Shielded Straight-Through Modem
Cable
The BC22E or BC22F is a 25-wire cable with
a male 25-pin D-connector on one end and a
female 25-pin D-connector on the other end.
Can be used with DECserver 700-8.
BC22R Shielded Null-Modem Cable The BC22R has a male 25-pin D-connector
on one end and a female 25-pin D-connector
on the other end. Can be used with
DECserver 700-8.
V.24 to RS-232-C Adapter
Part # 12-27591-01
Use the V.24/RS-232-C adapter
(12-27591-01) to convert the 25-pin D-con-
nectors to RS-232-C format. The adapter
works by passing through the RS-232-C
signals and blocking the others. EIA-232-D
has the same signals as V.24; therefore, no
adapter is necessary. Can be used with
DECserver 700-8.
CAUTION
The V.24 to RS-232-C adapter must be fitted
if the modem/eliminator has Data Signal Rate
Selector (DCE) on pin 23. Failure to comply
with this could result in damage to the inter-
face module and modem or eliminator. If you
are not sure what signals the modem or elimi-
nator provides, contact Digital Customer Ser-
vices, or fit the adapter connector as a pre-
caution.
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