Simple NAT Traversal with Asterisk
December 23, 2015
As an experiment, I configured Asterisk for full NAT traversal so that my SIP server could be accessed from the Internet. This isn’t usually what you want, but here’s how you do it…
Music-On-Hold for Asterisk
December 19, 2015
Got Music On Hold (MOH) working for Asterisk 1.8. Turns out that it’s not that hard, but there’s some specific requirements to get it going if you don’t want to use mpg123 or something.
Asterisk in Docker
December 13, 2015
I’ve decided to bite the bullet, and I’m working on converting my existing Microserver Centos 6 setup across to Centos 7 with Docker containers for all my applications.
Cisco 7965 Phone Directory Setup
December 9, 2015
The Cisco 7965 has a Directory button, which can retrieve an XML document from a website and format that as a phone directory. Setting it up is pretty simple.
Cisco 7965 VOIP Phones Standalone (with Asterisk)
December 8, 2015
My work has a number of older Cisco 7965 VOIP Unified Communications phones, which are being disposed of. I thought I’d grab one and see if I could make it work. These phones are intended to be used with a Cisco Unified Call Manager & using Cisco’s proprietary SCCP protocol. But it’s possible to re-flash them with a SIP-based firmware and configure them without UCM.
TP-Link TL-POE10R PoE Splitter Ground Loop Issues!
November 12, 2015
A warning for those who are setting up PoE gear (like I’m researching). The TP-Link TL-POE10R (a low-cost voltage switchable PoE splitter) has a fairly major issue. It’s not galvanically isolated.