Register SPA502G phone using DDNS service

[ebrahim.m@exoticcolors.me]

Hello, 

I have Cisco SPA502G IP phone in different branch. I'm trying to register the phone to my third party PBX system by using company DDNS. The Cisco phone and the PBX located in different locations and different network. 

I already setup the extension in the PBX and activated the NAT option and the remote extension from the PBX, Now i'm stuck with configuring the IP phone from the phone page i don't know actually where i should mention the DDNS configurations and what options i should activate and also to be honest i don't know if my Cisco SPA502G has the feature to be registered remotely by using the DDNS or i should only register the phone inside the same network using the LAN. 

Sorry for the long explanation . 

[Dan Lukes]

SPA5xx supports no DDNS.

But I'm unsure whats the DDNS is good for here. Phone needs to register as extension of PBX. Once registered, PBX knows it's address so it can contact it. There's no DDNS required.