APC AP9608 - Manual (Page 13)

9
Any changes to Call- UPS II communication settings are held until the end
of the session. Changes are made when Call- UPS II issues modem com-
mands at that time.
Connect to Modem
Call- UPS II requires a modem for remote UPS control and paging. If a
modem is used with Call- UPS II , some thought must be given to powering
it. Plugging the modem into the protected power output of the UPS will
keep the modem operating in bad power conditions, but remote turn-on
of the
UPS will not be possible since, when the UPS is off, the modem
is off. By plugging the modem into a wall socket, remote turn-on of the
UPS will work, but the modem will have to get by with unprotected
power. Also, it is possible in this situation to miss pages, since the
modem would be off in a power outage that Call-
UPS II tries to report by
paging.
A better option is to use a modem designed for portable computers that
draws power from the computer. Call-
UPS II will power such a modem,
providing protected power whether the UPS is on or off. Be careful to use
a modem that draws power from Call- UPS II , not a battery.
The configuration is complete. Disconnect the management device from
Call-
UPS II . Connect the Call- UPS II according to the appropriate system
connection diagram on the following page.
Note: Use a standard modem cable to make this connection. Do not
use the null modem cable supplied with Call- UPS II .