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 ?
Here’s a generic business voicemail greeting example: “Thank you for calling [company/person’s name]. We are currently unavailable, but if you leave your name, phone number, and message, we will get back to you as soon as possible.” The above greeting is a professional voicemail script used by many growing and established businesses.

With OpenPhone you can record your own voicemail greetings directly in the app, upload your own voice clips or simply type your voicemail script.
Some of the best business phone systems allow you to create multiple voicemail greetings so that you don’t have to constantly re-record your greeting. This is a great feature as it gives you the option to have different voicemail greetings depending on whether a call comes in during or outside of business hours.