Call Menu to Ingroup when extension is busy or unattended

[Yanela08]

Masters, is it possible to transfer the call to an inbound group when the sip extension is engaged in a call and could not answer it or have not noticed that there is incoming call? My current setup is that I have a callmenu that transfers the call to a sip extension and when the agent could not answer it, they are left with a voice message. I want it that if the agent is busy or can't take the call, the caller has an option to press 0 to be transferred to the operator OR press 8 to leave a voice message.

Thank you so much.

Goautodial
VERSION: 2.4-309a
BUILD: 110430-1642