
Pure Highway 600

Pure Highway 600
I have installed the Highway 600 according to the instructions. Radio via FM frequency is working. Mobile phone connected via Bluetooth. The Highway 600 shows the contact list etc. When I dial a contact, a call is set up, but no sounds are transmitted. Same thing when I receive calls: it rings, I can answer the call, but neither the caller nor the called party can hear anything. Who can help me here?