It should work with the DS as master, and a PC with a NUT client installed, as a slave.
I tested this (and it worked with my DS; UPS, see signature), using this information (for Windows):http://www.gadgetvictims.com/2010/02/ba ... -home.html
Some additional info:
Location ups.conf and upsd.users: /usr/syno/etc/ups/
In ups.conf (nothing changed) you will see the name of the ups (strangely enough: 'ups')[ups]
driver = usbhid-ups
port = auto
In upsd.users I added a user: monuser2. (Don't know if this is necessary, but I didn't want to change anything for the default user)[monuser]
password = secret
password = mylittlesecret
And, for Windows users:
In the WinNUT configuration tool I added this to the configuration file:MONITOR email@example.com 1 monuser2 mylittlesecret slave
(IP address is of course the LAN IP of the DS).
Settings configuration tool: same as in link.
[Added line]: After that, choose 'Apply and start WinNUT' in the WinNUT configuration tool.
And yes: you also need to connect the power of the router to the UPS
[Edit]: Mods in these config files will be overwritten on a FW update.
DS412+. 1x WD20EFRX + 3x HD204UI, SHR (RAID5). DSM 4.2-3211.
DS210j. 2x HD203WI, RAID1. DSM 4.2-3211.
Router Netgear WNDR3700. Switch TP-Link TL-SG1008D. AcRyan Mini v1. UPS APC BE700G-GR. Ipcam Edimax IC-3010.