Barrett Lyon has created a don't miss resource that shows you how to configure P2P SIP URI (Uniform Resource Identifier) dialing on your Asterisk-based PBX. "There are thousands of people that operate ...

I just purchased new Cisco 7940 phones and tried to load the SIP 7.4 firmware to run with Asterisk@home 2.2. I'm not sure where I went wrong, but I uploaded the SIP firmware to the TFTP directory on ...

Cisco SIP based phones have SIP extensions that use the SIP protocol for Cisco proprietary operations like registering a Cisco SIP phone by MAC Address. This blog will take a high level look at ...

I've never needed to do this with a network that had an ASA, but have done it with a Sonicwall. When setting up a FreePBX server behind a Sonicwall I needed to do the following: - Turn on Consistent ...

Two of the most common forms of network address translation (NAT) are dynamic port address translation (PAT) and static NAT. PAT is the many-to-one form of NAT implemented in many small office and ...