I've never seen these logs before. They're saved in /vmail.
I don't know how I would have enabled them but they seem to be creating new files every 45 minutes or so.
I rebooted the system to see if I could turn them off but it survived the reboot.
[EDIT] Here's the name of one of the files: SMH_Log_30ae542c_20260112_094903.txt [/EDIT]
Here's a sample of the 1st part of one of the files:
g_SMH_History = 1
CCC SMH SSM
30ae542c 00000000 15:48:43.500 | |<----------- START ------------|
30ae542c 00000000 15:48:43.500 | |--------- START_ACK ---------->|
30ae542c 2df66818 15:48:43.500 | |<--------- REQ_OFFER ----------|
30ae542c 2df66818 15:48:43.500 | | | ## State SMH_MAIN_FSM_SR ## SMH_SR_FSM_IN
30ae542c 00000000 15:48:43.510 |---------- OPEN_RX ----------->| |
30ae542c 2df66818 15:48:43.510 | | | ## State SMH_MAIN_FSM_SR ## SMH_SR_FSM_IN_OPRx
30ae542c 2df66818 15:48:43.520 | |<------- IN_CALL_200_OK -------|
30ae542c 2df66818 15:48:44.220 | |<- |
30ae542c 2df66818 15:48:44.220 | | ) TIMEOUT_REQ_OFFER |
30ae542c 2df66818 15:48:44.220 | |<- |
30ae542c 2df66818 15:48:44.220 | |---------- OFFER_SR ---------->|