Nothing changed as a result of your device upgrade. That's how it works. If you were making bridged calls, then you were having Google Voice call you on a real telephone number you had set up on your OBi, such as a free inbound number from Callcentric, or any other telephone number. The change that may be confusing you, is that Google shut down the Chat/Talk/XMPP infrastructure, so there is no longer a Chat destination.