What is the difference between the power level and signal level? You read power level on modem and it is different than signal level on signal meter. I am looking for some classification. It can be confusing.
They work for a while, but then after between 5 minutes and an hour, they stop being able to place or take calls.
They send a BYE message immediately after they send or receive 200 on an INVITE. Resulting in a busy tone.
There's no error message or anything to explain it on either syslog or SNMP.