Hi, I'm using ser-0.8.12 for SIP proxy and CISCO2651XM(12.2(11)T8) as media gateway for PSTN. When any subscriber call to PSTN via CISCO media gateway, CISCO returns "SIP/2.0 183 Session Progress", and if caller hang up before called party in PSTN pick up a call, CISCO send a packet of "SIP/2.0 481 Call Leg/Transaction Does Not Exist" and call between CISCO and PSTN called party is not hung up. (Called party phone continue ringing) (I consider that transaction before caller party pick up is not added CISCO's transaction table.) Could anyone please let me know how to terminate a call between CISCO media gateway and called party in PSTN? Regards, -- - zaki - YAMAZAKI Noriyuki, Director of EDGE Co., Ltd. +81-3-5749-9621(Phone), +81-3-5749-9910(Fax), zaki(a)edge.jp