Activate BSNL Call Forwarding, Divert Calls to Mobile/Landline

How to divert voice calls from my BSNL number to other number, and how to cancel the call forwarding, Is the facilities provided at free of cost or chargeable, What is the process for activation of...

source https://bsnlteleservices.com/activate-bsnl-call-forwarding-divert-mobile-voice-calls/