Spill-forward feature

In telecommunication, a spill-forward feature is a service feature, in the operation of an intermediate office, that, acting on incoming trunk service treatment indications, assumes routing control of the call from the originating office.

Note: This increases the chances of completion by offering the call to more trunk groups than are available in the originating office.

Source: from Federal Standard 1037C and from MIL-STD-188