The Contact Closure port (CCA) is wired as an RJ-14 port, but uses an RJ-45 network jack. This port is used to support the Branch Gateway’s Contact Closure feature. The Contact Closure feature is a controllable relay providing dry contacts for various applications.

The adjunct box provides two contact closures that can be operated in either a normally closed or normally open state. The contact closures can control devices such as, devices that automatically lock or unlock doors or voice recording units. The CCA port can be configured so that the connected devices can be controlled by an end device, such as a telephone. For example, a user can unlock a door by keying a sequence into a telephone keypad. For more information on Contact Closure, see Installing the Avaya Partner Contact Closure Adjunct.