A text string to specify the effective Incoming CallerID for the port. This object must be successfully set for a port to use the dynamic dial pool. It is used by the port to decide if an incoming call should be accepted. An incoming call on a dynamic dial path must provide a CallerID matching this object's value in order for the call to be accepted. For a non-virtual port, setting this object alone is sufficient to configure the port to use the dynamic dial pool. Note however, that the dynamic pool can only be used as a Secondary dial path, and not as a Primary path, for a non-virtual port. In the case of a virtual dynamic dial port, this object is used in conjunction with objects a3ComPortPath and a3ComPortStatus to create a virtual dynamic dial port.