H.7 Interworking class

04.083GPPMobile radio interface Layer 3 specificationRelease 1998TS

H.7.1 Cause No. 127 "interworking, unspecified"

This cause indicates that there has been interworking with a network which does not provide causes for actions it takes; thus, the precise cause for a message which is being sent cannot be ascertained.

Annex I (informative):
GSM specific cause values for session management

This annex is informative.