With bluetooth connected, iPhone 4S doesn't ring through the phone.

[Nashvillian]

When I connect my bluetooth headset to my iPhone 4S, the phone only rings through the headset. If I take my headset off or hang it around my neck, I can't hear the phone ring or alerts for a text message or calendar events because the sound doesn't come through the phone's speaker; only the headset.

Is this adjustable?