Supplementary services The H.450 standard specifies call functions
commonly found in voice networks. Examples of such functions are call
forwarding, call transfer, call hold, call waiting, and so on. Some gatekeepers
implement these functions for the endpoints that they serve. For
example, your H.323 endpoint receiving voice calls may need to forward
calls to your cell phone while you are at another facility. Cisco typically
implements these features in H.323 gateways or in CallManager.
However, as of 12.1(5)XM the MCM gatekeeper will support a gateway
that performs call forwarding or call transfers.