I'm trying to fake a BYE message to a UA to make it drop a call. I input the following: serctl fifo t_uac_dlg BYE "sip:116@xxx.xxx.55.252:5060" "From:82616925@xxx.xxx.131.216" "To:116@xxx.xxx.55.252" "CSEQ: 2 BYE" but it returns with : 400 fifo_uac: next hop uri invalid can anyone tell me what's wrong, or give me a good example of how to properly do this? Thank you.