Is Voxalot voice mail MWI solicited or unsolicited?

[boatman]

I will be using the Voxalot voice mail system with my SPA2102 and also with Twinkle (a SIP softphone). In twinkle setup there is a question about the voice mail MWI type, is it solicited or unsolicited? Which is it?

I suppose this means; does my ATA or softphone ask Voxalot if I have any messages, or does Voxalot come and tell my SIP device that there is a message waiting?

I am just wondering about the process of how the MWI indicator gets set in my SPA2102 so that my phone will chirps every few minutes whenever I have a voice mail message.

What should I do with the field 'Mailbox Subscribe Expires' and what is the meaning of the default value there, which is 2147483647 ?