System information

Manual:System/UPS

Applies to RouterOS: v3, v4 +

Summary

Sub-menu: /system ups

Standards: APC Smart Protocol

[1]

The UPS monitor feature works with APC UPS units that support “smart” signaling over serial RS232 or USB

connection. This feature enables the network administrator to monitor the UPS and set the router to ‘gracefully’

handle any power outage with no corruption or damage to the router. The basic purpose of this feature is to ensure

that the router will come back online after an extended power failure. To do this, the router will monitor the UPS and

set itself to hibernate mode when the utility power is down and the UPS battery is has less than 10% of its battery

power left. The router will then continue to monitor the UPS (while in hibernate mode) and then restart itself after

when the utility power returns. If the UPS battery is drained and the router loses all power, the router will power

back to full operation when the ‘utility’ power returns.

The UPS monitor feature on the MikroTik RouterOS supports

•• hibernate and safe reboot on power and battery failure

•• UPS battery test and run time calibration test

•• monitoring of all "smart" mode status information supported by UPS

•• logging of power changes

The serial APC UPS (BackUPS Pro or SmartUPS) requires a special serial cable (unless connected with USB). If no

cable came with the UPS, a cable may be ordered from APC or one can be made "in-house". Use the following

diagram:

Router Side (DB9f) Signal Direction UPS Side (DB9m)

2 Receive IN 2

3 Send OUT 1

5 Ground 4

7 CTS IN 6

General Properties