Based on the linked above

Foreword
Cold Staking is a unique feature of Callisto Network that rewards users for staking. The implementation is planned during the first hard fork (HF1) which is set on November 11th.

Please bear in mind the following:

Cold Staking is at its development phase at this moment and will not be implemented in production until it has been extensively tested.
Make sure not to send any funds from mainnet. You can use this faucet to request test $CLO.
A protocol description is out of scope in this post – an extended writing about Cold Staking can be found here.
Cold Staking contract is currently deployed at 0x99e318aa116bba18db83cfcfc9d071d8ddb6fa17 address.
A human-friendly UI will be developed for Cold Staking, this is just for test purposes.

Note: Don't know if that is November 2018 or what? . But overall, that article is useful and full of good sense about the Callisto network activity. This will be the most easiest way to understand the system itself, well done!