How to lock the phone and unlock?
You need to go for third party tool for locking and unlocking the IP phones.
Do we don't have any other procedure without using a third party tool?
Other way around , u can use Extension Mobility where the user need to enter credentials if it solves your purpose.
In addition to lock using EM
disable setting access from phone configuration page so users can only access ring tones and background from setting menu
Hi Obaid,Yes, by using fac feature.Please rate this post if helpfulSent from Cisco Technical Support iPad App
FAC does not lock phonesSent from Cisco Technical Support iPad App
you can try to take a look here: http://www.2ring.com/NewJuice
The feature called PhoneLock can resolve your need.
Basically, the (un)locking principle is based on CSS change and on user PIN.