What is the fine-grained topic of the following text: Now when a client calls 1 of his 5 standard numbers it rings through to Ray on his IP desk phone or his cell phone, when he picks up the call he’s informed which line is calling him giving the name of the company, for example he’ll pick up and hear “Acme Co.”, then connect the call and know which company is calling without having to ask. Only return the topic.
Call forwarding and identification system