Algo 8186 SIP Horn Speaker Demo
I recently had the chance to set up an Algo 8186 SIP Horn Speaker for a client. The speaker can act as a loud ringer for a phone extension and/or …
VoIP Phone Unregistered after Disabling SIP ALG
Last week I disabled SIP ALG (or “SIP Conntrack”) on my UniFi USG router: Today I noticed that one of the accounts on my Yealink T42G phone was unregistered. My …
Advanced Wireshark SIP filters
When looking for SIP traffic in Wireshark, you can start with the Display Filter sip. Here are a couple more specific filters. To find a specific type of SIP packet: …
Disable SIP ALG on Tomato Shibby
A PBX vendor like 3CX may tell you to disable SIP ALG on your router. I’m running Tomato on my router, specifically Tomato Firmware 1.28.0000 MIPSR2-132 K26 Max. With the …
Getting Asterisk to Bridge Audio
In my original PBX in a Flash setup, Asterisk is set to “listen in” on calls. One advantage of this is that it can then respond to commands sent from …