What does PRICID stand for?

Answer 1

It is Primary Rate Interface caller identification:

Primary Rate Interface (PRI) caller identification is a feature that allows a PRI-enabled phone system to display the phone number and/or name of an incoming call on a PRI trunk. PRI is a type of Integrated Services Digital Network (ISDN) that is used for carrying voice and data over a digital line.

PRI caller identification works by transmitting a signaling message between the caller's phone network and the called party's phone network. This signaling message contains information about the caller's phone number and name, which the called party's phone system can use to display this information to the user.

This feature is commonly used in business phone systems, where it is important for the user to know who is calling before answering the call. It can also be used to help screen unwanted calls or identify important calls from specific clients or customers.