Voice Gateway line monitor method

The present invention relates to the art VOIP system. The invention solves the realization of the existing VOIP voice gateway monitoring function can not ensure real-time problem, provided a voice gateway listeners online method, technical solutions can be summarized as follows: the coding system used in the conversation mode negotiation G711A, and then call two-way RTP stream redirected to the internal buffer queue, and the interior of two-way real-time transport protocol buffer RTP stream queue are decoded PCM pulse code modulation data, and then the two-way mixes PCM data of synthesized using software into one PCM data , then the PCM data is converted to synthesis G711A law encoding format data, and finally G711A law encoding format data converted by the RTP data packet to a listener. The beneficial effects of the invention are: to achieve real-time monitor for VOIP voice gateway monitoring system.