# Non-busy Extension

## Description

Non-busy Extension (NBE) lets you program an extension never to return busy tone. This feature is used for special situations (such as emergency stations).

If the NBE is idle when it is called, it rings normally. If several people call the NBE, they all receive ringback tone. When the NBE is answered, all of the callers are conferenced with the NBE. Any callers over the maximum allowed for a Conference are queued on the NBE. As callers release from the Conference, waiting callers join the conference in order of queuing.

## Conditions and Feature Interactions

- Non-busy Extensions cannot originate calls unless they are also programmed as a hotline extension. The ability to originate hotline calls allows callers to the NBE to enter into a conference with the NBE and the hotline destination. The hotline call must be set up before the conference can occur.

- Override cannot be used to override a call made to a Non-busy Station.

- A Non-busy Station cannot be placed on Hold.

- Calls can be transferred, forwarded, or rerouted to a Non-busy Station.

- When one member of a conference is a Non-busy Station, Privacy and Override Security are disabled.

- Non-busy Station is not supported for Hot Desk users.

## Programming

1. Analog Sets form

- Enable Non-Busy Ext.

2. Class of Service Options form

- Enable "Conference Call".

## Device Support

Not applicable

## Operation

None