I work for a college that uses hundreds of Cisco IP Phone 7960. These phones are provided to faculty offices and classrooms for dialing technical support. We have traditionally disabled all the classroom phones from receiving phone calls to prevent interruption of classes. Due to the changing nature of the college, we are getting more and more class from classrooms for technical support. This proves to be a challenging task as we only have a couple technicians available for running around the college to visit the classrooms.
I am wondering if it is possible to enable the Cisco phones in classrooms to receive calls, but limit it to only accept a limited set callers, such as the calls coming from the IT support center (Cisco phones and blackberries)? That would definitely save tons of time supporting the college.