Issue Description
Q:How to confirm the SIG VOIP gateway online time and offline time
Handling Process
A:VOIP gateway online time is that the time point of gateway begining to communicate for the first time, the gateway offline time is the time of the last communication in the concatenation communication. There is no idle time segment of VOIP in the gateway online timen and offline time, if it exists, it will be treated many times of gateway online and offline behavior.
Suggestions
We can retrieve the record of same gateway many times online and offline in the SIG gateway gatekeeper.
