Hi, In the following scenario, the Cisco will not generate a BYE message from Cisco VOIP ----> SER ---->CISCO--->PSTN VOIP ---- SER -----CISCO<-- HANG-UP In this scenario, the HANG-UP from PSTN generates a ev_disc_prog on the cisco. I have modified the sesssion tcl script to catch the ev_disc_prog to initiate a call tear-down and then it works the way I want...the cisco generates a BYE message. However, does anyone know if this diverts from any standards? -- mvh/best regards Helge Waastad