[3.01] Any extension can have an Intercom Queue key, not just an operator. If an extension with an Intercom Queue key is busy on a call, and it receives an Intercom call, the new call will ring the key. If additional co-workers call the extension, their calls "stack up" under the Intercom Queue key. As soon as the busy extension becomes free, the first (oldest) call rings the key first. The extension user can just press the Intercom Queue key to answer the call, then repeatedly press the key to answer the remaining calls. The Intercom Queue key is a visual reminder that additional Intercom calls are waiting to be answered.
An unlimited number of Intercom callers can queue for an extension with an Intercom Queue key. The callers hear ringback while they wait for the extension — not busy tone. The key winks on (green) when calls are queued.
By default, the extension receives Off-Hook Ringing for a call waiting on an Intercom Queue key.
If you assign an extension as an operator, it does not automatically get an Intercom Queue key.