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johnj.jpgAsterisk Tips/Fixes/Features

by John Johnson

These are various Asterisk how-to items I have found/developed over the last few years. Feel free to use or share them, I look forward to adding more as I am able to compile them into a share-able format from my own notes.    

“Experience is what you don’t get until just after you needed it.”

 

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 Algo 8180 SIP Audio Alerter

An All-in-One “IP Loud Ringer, SIP Speaker, & Voice Paging Device” from:

Algo Communication Products Ltd.

   I recently installed one of these in a public school and found it to be a great addition to an Asterisk based phone system. I was looking for a “Loud Ringer” to be used in the kitchen alerting personnel to the office phone ringing and not having any FXS ports off this system or wanting run wiring from the phone set to some aftermarket ringer I went looking for a SIP based device (preferably one that used POE) and found the Algo 8180. With its advertised paging and two-way talkback functions I thought it might make a good addition to our stable of Asterisk phone system components going forward.

   I did have some concern as I ordered the unit in that I found the description of the device confusing and it is a little pricey at $280.00. Here is the manufacturers page describing it as a SIP compliant PoE network audio device for loud ring and voice paging applications using dual endpoints” I was not entirely sure what that meant, to me “endpoints” mean devices that connect back to the server, i.e. phones, ATAs and the like, so I wasn’t sure how the Algo 8180 would use two of them. As it turned out in Algo-speak “endpoints” meant SIP Accounts/Extensions on the server, so it was all good.

   The Algo 8180 is a very full featured device that can do a lot more than just loud ringing and paging in an Asterisk based telephony installation  (though it does both of those well). See below to read about my experience with the device.

 

 

8180 SIP Audio Alerter   All-in-one is the operative term for this unit, it is a neat little package of about 8”H x3.5”W x3”D with a clean modern look to it. It come with a snap on/off wall mounting bracket and a simple 3”x2” 43 page booklet style manual that covers the installation/operation details of the unit nicely (here is a link to a .pdf of it). There is no wall mounting template, trust me you won’t need it with the included bracket. There is no external power supply, this unit is PoE only. If you don’t have a PoE switch to connect it to you will have to pick up a third-party PoE injector.

   When I un-boxed the unit in my lab I briefly perused the little manual and discovered the unit has both an html interface and five “Program Buttons” on the back. After plugging it into my network and waiting (very briefly) for it to boot up I pressed the second button from the right three times to get “ Device Info” and the unit verbally read me it’s dhcp delivered IP address. I typed that into a web browser and up came the “8180 SIP Audio Alerter Control Panel”.

   Notice in the “Login” section that the default password is displayed? How handy is that? Somebody has had to look up default passwords too many times and came up with a great idea! Shortly after this came up I was logged in, and shortly after that I had changed that password, I was after all installing this unit in a public school and those places are full of little mini hackers who would have a great time controlling a loud ringer and paging unit.

   The web interface is clean, direct and simple to use with tabs across the top, each with appropriate sub choices and fill-in-the-blank fields with radio button controls. Within ten minutes of powering the unit up I had it attached to two SIP accounts on my Asterisk server and could dial either extension to page or loud ring. And man was the thing LOUD. Fortunately the volume is independently adjustable through the web interface or the program buttons:

But wait! That’s not all! The 8180 has many additional abilities. You can:

Direct connect an additional un-amplified speaker extending both paging and loud ringing. (Algo offers a dandy outdoor horn for this purpose)

Direct connect an existing amplified paging system using the 8180 as the SIP adaptor.

Slave additional 8180s off one other via IP multicast creating a network distributed paging system.

Connect devices/systems via a dry contact output. Allowing you to unlock doors or trip alarms from your Asterisk system  by dialing an extension number.

Connect devices/systems via a dry contact input. Allowing the system to act as a door-open chime or security system alarm.

Use the system as a two-way intercom in large area/high noise environments.

And various combinations of the above. (see the rear panel connectors in drawing below)

All in all I would highly recommend the Algo 8180 as a great solution in a lot of scenarios using SIP telephony. It is easy to deploy, manage and use. And when you consider that within a certain scale it’s actually more cost effective than putting in; a paging adaptor, amplifier, speakers and the associated wiring to connect them as you would in a traditional paging/night bell implementation. Plus you gain so many additional abilities.

   I hope this article encourages you to consider the Algo 8180 SIP Audio Alerter in your Asterisk implementations, and while I haven’t tested any of their other products, they do offer an interesting line of SIP based equipment:

 

By John Johnson 2/20/2014

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