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HP OpenVMS Systemsask the wizard |
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The Question is: Hi, I've found lots of helpful information in your archives over the past several years. Thank you very much. I've found variances of this question, but I didn't find anything that helps me so I'm asking for help. I have a problem with one of my clients using: OpenVMS V7.1-2 AlphaServer 800 5/500 Firmware V5.5-78 My question is: Can a modem be connected to the TTB0: port? They currently have a UPS on TTA0:. I know that a 2100 on VMS V7.1+ can have both ports configured for modem control, but Im not sure about an 800. The problem is that I can get both their modem and UPS to work on TTA0:, but neither on TTB0: and I would like to get both working concurrently. Thanks in advance! Wayne Coop Systems Specialist Data Research Associates wcoop@dra.com 800-372-8527 The Answer is :
Modems can be configured on any serial port, but not all ports are
capable of modem control signals.
When configuring modems, the access to and the use of a testing
device known as a serial line break-out box is invaluable.
A variety of topics on configuring modems are present here in the
OpenVMS Ask The Wizard area -- there is no particular difference in
the low-level serial line protocols and modem control signals used
here, whether the host involved is OpenVMS VAX, OpenVMS Alpha,
terminal server, or otherwise. (The two most common interconnects
are EIA-423 and EIA-232, and these are very similar signaling with
differences in electrical interface and the pinouts.)
Some of the existing discussions of modems include the following:
(81), (153), (271), (300), (364), (634), (1001), (1016), (1761),
(1839), (1935), (2094), (2177), (2488), (2936), (2950), (2960),
(3033), (3127), (3633), (3695), (3925), (4331), (4347), (4566),
(4639), (5576), (5852), (5997), (6015), (6758).
Various related topics are included in the OpenVMS FAQ.
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