Cisco Unified Communications Manager Express Overflow Lines Configuration

D.

x expansion/overflow, define additional expansion lines that are used when the primary line for an overlay button is occupied by an active call.

The Cisco Unified Communications Manager Express (CUCME) provides a feature known as "ephone buttons" that allows users to handle multiple lines on their IP phones. In the case where a user has a primary line and overflow lines, they can configure overlay buttons on their phone to enable the overflow lines when the primary line is occupied by an active call. The separator used in the ephone button configuration is what enables this overflow functionality.

The answer to the question is C. The separator "w" is used to enable overflow lines on an overlay button when the primary line is busy. When a user sets up an overlay button configuration, they must define the primary line and the overflow lines. The primary line is the line that the user uses most frequently, and the overflow lines are used when the primary line is busy. The separator "w" indicates to the system that if the primary line is busy, then the system should try to use the overflow lines.

The other answer choices are not correct. The separator "o" is used to indicate that a line is an overlay line, but it does not enable overflow functionality. The separator "c" is used to indicate that a line is a busy line, but it also does not enable overflow functionality. The separator "x" is used to indicate that a line is not in use, and the separator ":" is used to separate different parts of the ephone button configuration.

In summary, the separator "w" is used to enable overflow lines on an overlay button when the primary line is busy in Cisco Unified Communications Manager Express.