![]() NAT Mapping Enable and NAT Keep Alive Enable to yesĬonfigure STUN Server and external IP address. Many articles will tell you to setup your phone as follow: This article is not about how to use or setup your asterisk pbx, it is about how to setup Cisco spa device to work with asterisk when it is behind firewall or NAT. ![]() All you need to do is enter an extension number for the phone, password and if the phone is behind NAT or not. Setup of the extension in free or a commercial web interface like freepbx or elastics is very simple. There must be hundreds of articles explaining same scenario and providing step by step instructions how to configure Cisco spa5xx and spa3xx phones to work with asterisk. ![]() ![]() These instructions are for spa303, spa504g, spa508g, spa112, spa122, spa232g as well as many other Cisco phones and devices including older Linksys like spa9xx. ![]()
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March 2023
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