CF ext. calls: On busy

Toggles the pbx-setting which redirects all incoming calls to a specific number when the user/phone already is in a call. Only for calls that arrive via a specific exchange line. Uses feature-code: ##96 + exchange + #*67* + target + # + extension to activate forwarding and ##96 + exchange + ##67# + extension to deactivate.

• green when Call forwarding is enabled to the target on the provided exchange
• off when Call forwarding is disabled to the target on the provided exchange
• solid orange on error, e.g. when sip dialog subscription to the feature-code did not work
• orange blinking when subscription is being (re-)tried to establish

The key-type has the following parameters:

The identity the key is tied to. Only active identities can make calls or send sip-subscriptions.

The exchange line access number (account number) that identifies the exchange.

The target where forwarded calls are to be redirected to.