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HP OpenVMS Systemsask the wizard |
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The Question is: Is is possible to install an internal modem in a AS1000A i.e USR 14400 and how would it be done ? The Answer is :
The directions included with the PBXDF-AA modem or similar should include
this information.
The hardware portion of the installation on the typical Alphaserver series
system consists of using the ECU to select the generic ISA driver file
included on the ECU distribution kit. The PBXDF-AA is a 14.4 zoom/fax
modem that uses 8 I/O addresses and an IRQ. You will have to tell the
ISA driver about the requirements for your specific modem device. One
local system has used the modem configured at 2F8 and IRQ 3 -- this will
cause the ECU to disable the on-board COM2 port (after a warning). The
modem is then set up for COM2 and placed in the configured slot.
When OpenVMS is booted, use SET HOST/DTE to TTA0: (or the terminal that
is associated with the COM port you used), and use the modem command set
(AT or otherwise) to disable response codes, disable the forcing of DSR
(pin 6), honor DTR (pin 20) to reset or to enter command mode, and honor
DCD (pin 8). You will want to set this up so that if the modem is reset,
it reloads its "brains" correctly.
With an AT-style command set, this sequence of commands looks like:
AT Q1 &S1 &D2 (or &D3) &C1 &W0 &Y0
You'll need to decide on the auto-answer behaviour and various other
modem-specific settings, as well.
If you have problems with the SET HOST/DTE, connect a terminal or PC
with a terminal emulator directly to the modem to configure it. (This
avoids problems establishing the connection to the modem port that can
result from an incorrectly configured modem.)
Now please see the other discussions on how to configure a modem on an
OpenVMS system that have been posted in the Ask-The-Wizards area in the
past -- these discussions will cover the host portion of the necessary
OpenVMS modem configuration process.
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