ID Number: Q76909
2.00
OS/2
Summary:
Most uninterruptible power supplies (UPSs) signal their status via
contact closure or voltage changes on specific pins. LAN Manager uses
this method to monitor the UPS.
The pins that LAN Manager uses are:
CTS = Line fail
(Power out)
DCD = Low battery
DTR = UPS shutdown
(Signal from the server to the UPS to shut down)
Whether a signal is high or low to indicate a given state is dependent
on the manufacturer. For more information, please see the UPS section
of Appendix B in the "Microsoft LAN Manager Administrator's Reference"
(see especially the VOLTLEVELS parameter), and the user's guide that
came with the UPS.
More Information:
Unfortunately, there is an IOCTL (I/O control) used to handle the
types of signal changes a UPS sends that is not supported in
COM0x.SYS; therefore, the UPSDRV.OS2 driver used by LAN Manager is
required.
Note: The UPS service/driver defaults to COM1. If another
communications port is being used, it must be specified when loading
the driver in the CONFIG.SYS file. Change CONFIG.SYS from
device=c:\lanman\drivers\upsdrv.os2
to the following
device=c:\lanman\drivers\upsdrv.os2 /PORT:COMx
where x is the number of the COM port.
Additional reference words: 2.00