Technical data

Managing Peripheral Devices
8.7 Managing Modems
Table 8–6 Connector Applications
Connector and Pinout Example Adapter
1
A DB9 9-pin connector with
an EIA-574 PC-compatible
pinout
The DB9 connectors found on
most PC, AlphaStation, and
AlphaServer systems
Use the H8571-J or compatible MMJ
adapter.
A DB9 9-pin connector that
predates the EIA-574 pinout
The console connector on
various MicroVAX systems
uses a pinout that predates
the EIA-574 pinout
Use the H8575-B or compatible MMJ
adapter.
A DB25 25-pin connector
with the EIA-232 wiring
The communications ports on
many terminals
Use the appropriate adapters from the
following list,
2
or contact a Compaq sales
representative or Compaq reseller for
information on adapters not listed below:
H8575-A DB25 female to MMJ
adapter, straight-through
3
H8571-C DB25 male to MMJ
adapter, cross-over
4
H8575-E DB25 male to MMJ,
straight-through
3
A compatible adapter
An 8-pin DIN (round)
connector
Use the H8584-AB or compatible MMJ
adapter.
A Modified Modular Jack
(MMJ) DECconnect socket
1
This table contains only a subset of the DECconnect adapters available. The adapters listed in this table might not be
suitable for your particular application requirements; additional DECconnect adapters are available from Compaq.
2
The genders listed are those of the connector on the adapter.
3
Straight-through indicates that the EIA-232 Transmit Data signal is wired to the DEC-423 Transmit Data signal, and so
on.
4
Cross-over indicates the EIA-232 Transmit Data is connected to the DEC-423 Receive Data, and vice versa, and that
DTR and DSR are similarly connected.
If your application does not use one of the serial wiring connections shown in
the table, you need to determine the specific requirements of the device, as
well as the specific pinout. You also need to determine the cabling appropriate
for the application. Contact your hardware support organization, your
Compaq support representative, or your local Compaq reseller.
MMJ Accessories
Table 8–7 lists order numbers and descriptions of some DECconnect
accessories available from Compaq.
Table 8–7 DECconnect Accessories
Order Number Description
BC16E-02
BC16E-10
BC16E-25
BC16E-50
BC16E-A0
DEC-423 (based on EIA-423) MMJ office cable, available in various
lengths.
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Managing Peripheral Devices 8–29