Incremental addition and scale-back of resources adapting to network resource availability

摘要

An exemplary method includes receiving at a first network a notice of an intended communication to a called party network, wherein the intended communication requires a resource for supporting a streaming data protocol in each network between a calling party network and the called party network; forwarding the notice of an intended communication to a second network and toward the called party network; in parallel with said forwarding, initiating for the intended communication a determination of resource availability for the first network; performing for the intended communication the determination of resource availability for the first network, wherein the determination is for a first resource for the first network; and verifying resource sufficiency for the intended communication. Verification of resource sufficiency is based on resource, (e.g., bandwidth) availability being greater than a threshold for plural network segment of the calling party to calling network required for the intended call.