6
4 Secure the Call-UPS II with the screws removed in step 2.
5 Turn on the UPS and the protected equipment.

External Version

It is not necessary to turn off the the UPS or its load before connecting or
disconnecting the external Call-UPS II. When connected, Call-UPS II may
cause the UPS to beep, or, if the UPS is powered off, to power on. This is
normal.
If a device such as a server or workstation is currently using the communi-
cations port on the back of the UPS, disconnect it now according to the
UPS connection instructions. Connect that device securely to the UPS
Monitoring Port on Call-UPS II. See Sec. 2.5 to determine if the optional
power adapter is required.
3.4 Confirm Operation
Observe the status indicator on Call-UPS II. After a moment it should
be on continuously. If the indicator flashes rapidly, Call-UPS II has failed
its power-on self-test. See Chapter 5.
Use only APC-supplied cables to connect the external version
of Call-UPS II to the UPS. Do not connect to any Call-UPS II port
except as specified in these instructions. Connections using a
cable or any other manufacturer may cause damage to or
improper operation of Call-UPS II, the UPS, or the computer.