Intercom Profile (ICP)

ICP defines how two Bluetooth enabled mobile phones in the same network can communicate directly with each other without using the public telephone network. This function enables, for example, the interconnecting of phones within an office. This profile has also been referred to as the walkie-talkie profile.

Usage Scenarios

A typical scenario for the ICP would be two mobile phones engaging in a call on a direct phone-to-phone connection using Bluetooth only.

Example Products

Here are a few examples of the types of devices that you might find using the ICP:

• Mobile Phone
• PC
• Laptop
• Desk/Cordless Phone

Getting Technical

As the intercom usage is completely symmetrical, there are no specific roles defined. A device supporting the Intercom profile will generally be denoted as Terminal (TL).

In the profile, the interfaces in the figure to the left are used for the following purposes: A) The Call Control entity uses this interface to the speech synchronization control to connect and disconnect the internal speech paths;   B) Used to deliver TCS messages on the connection-oriented (point-to-point) L2CAP channel;   C) Used by the Call Control entity to control the Link Manager directly for the purpose of establishing and releasing SCO links; Note that, for initialization purposes, it is additionally required to control theLC/Baseband directly, to enable inquiry, paging, inquiry scan, and page scan. Need more? View the Intercom Profile (ICP).