Patent ID: 7961628

Claim:
A method of call trace on a Next Generation Network (NGN) Media Gateway (MG), comprising: receiving, by the MG, an H.248 message from a soft-switch, wherein the H.248 message is added with a trace indicator and an Trace ID of a call that needs to be traced, wherein the trace indicator is used for indicating the MG whether the H.248 message relates to the call that needs to be traced, and the Trace ID is carried in a call tracing package set for supporting simultaneous multi-call tracing; determining, by the MG, whether the call to which a transaction in the received H.248 message belongs needs to be traced according to the trace indicator; tracing the call to which the transaction in the H.248 message belongs; and outputting different calls according to the Trace ID carried in the call tracing package respectively.