LAN/Local IP Address in Status > Registration

It is NOT the same as FusionPBX and I'm not sure why you thought it would be.
Well, I'm not deep into the code and have no reference for what is FreeSWITCH and what is still FusionPBX and what is purely FS PBX. I know Dereck is working very hard to evolve the product away from all things FusionPBX. My only concern is that the report should work correctly if it is going to be there and I'm not throwing shade at anybody over a very small issue.
 
Well, I'm not deep into the code and have no reference for what is FreeSWITCH and what is still FusionPBX and what is purely FS PBX. I know Dereck is working very hard to evolve the product away from all things FusionPBX. My only concern is that the report should work correctly if it is going to be there and I'm not throwing shade at anybody over a very small issue.

I understand, as I mentioned, this is not something anywhere in the sip protocol, Mark just discovered it. I personally think it is a bad thing in principle. If you are trying to conceal your LAN infrastructure an IP phone should not be revealing it by putting it in the call-id. I know it is very useful but its definitely not a field freeswitch uses, nor is it needed for functionality, its just a field we all like.
 
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I'm looking at registrations of several different phones and only a few include the local LAN IP in the call-id string. Some include some hex hashed string that I have no idea how to decode. Most don't include anything that would indicate local LAN IP.

Like you said, its is something we all like but I don't think its functionally practical since different phones register with different registration strings. My Grandstream GRP2612 phones send the IP. My ancient Aastra 9143i phones send the IP. My Fanvil X series send the IP. My Avaya j139 3PCC phones send a hashed code which reveals nothing about the content.

Since there is no registration standard covering local LAN IP, I'm sure each manufacture is using different registration.