Do I need to change any of my applications in order to enable a Service Broker to work on my network?

The ability to reutilize existing applications without requiring coding changes is one of the innovative capabilities and a prime driver behind the interest in service brokers. Services brokers must ensure that those applications (some of which may be prohibitively expensive to touch) remain untouched, requiring at most provisioning changes only. Recall that when the service broker is attached to an existing application, the service broker will emulate either a MSC or CSCF or other switching element.