Does current release of Asterisk use unsolicited notify to support MWI?

I want to know what is the current release of Asterisk Server and whether Asterisk server supports the SUBSCRIBE NOTIFY for MWI or uses unsolicited notifies.

As per my information Asterisk Business Edition B.1-3 uses unsolicited notifies to support MWI.

Please help me in his regard.

Thanks in Advance.