Does anyone know how to transfer directly to voicemail with a Cisco SPA 500 series phones. We recently upgraded from Grandstream phones. On the Grandstream you could hit * then the extension and it would go directly to voicemail.
That the way it works. CISCO must be blocking the “*”. You’ll have to investigate the CISCO dialplan and modify accordingly.
Cisco Phones can be a real pain in getting them to play nice with Asterisk.
The SPA series phones are the Cisco Small Business line acquired from Linksys (who bought Sipura). They work great with Asterisk.
Still, Your problem is probably that the dialplanin the phone is not retransmitting the “*”.