There is a limit on the VM length but you can modify it. This line of the script has a maxLength parameter, represented in seconds: resp.record(maxLength=”30″, action=”/handle-recording”). If you changed that value from 30 to 120, for example, the max VM recording length would be 120 seconds, for example. Note that the voice mail recording is not stored on the Pi; it’s stored on Twilio’s servers, hence the per minute charge from Twilio for the recording and the service. Is it possible to use it as CCF (conditional call forwarding)? after enabling the forwarding option it should play some pre recorded messages on the basis of who calls ?
One of the things to remember before recording your business voicemail greetings is to identify your pain points. This will help you to state more clearly for your clients in leaving enough context when leaving a voicemail.

22.Hello, you’ve reached [X company]. Unfortunately, we can’t answer your call right now. But your call is very important to us — so please leave us your name, phone number, and the reason for your call and someone from our team will get back to within [X number] business days .
Did you receive pre-recorded phone messages on your phone from a Utility company? If so, you may qualify to participate in a Shamis & Gentile, P.A. class action lawsuit investigation into whether these companies may have violated the Telephone Consumer Protection Act (TCPA) with these prerecorded phone messages.