[asterisk-users] Meaning of RTT in channelstats

[Doug Lytle]

On 5/16/20 9:57 AM, Michael Maier wrote:
> On 15.05.20 at 14:31 Doug Lytle wrote:
>> Google says Round Trip Time
>>
>> https://www.voip-info.org/asterisk-rtcp/
> That doesn't answer my question (I know the abbreviation RTT). Therefore I'm trying again:
>
> I'm just wondering what the RTT *exactly* means. Where are the exact measuring points located?
>
> => How are the RTT values exactly calculated? Which values are actually used for?
>
> => What about the processing time between the inbound leg and the outbound leg (transcoding, ...)?
>


Somebody else more knowledgeable then me will have to chime in here, but 
my guess would be, that since TCP is stateful, it's the amount of time 
that a RTCP packet taken to be acknowledged the recipient.

The measure points located would probably be each hop in the path, which 
typically can be visualized with traceroute.

Similar to ping; the math behind it I would have no clue.

And again, just a guess.

Doug