skip to Main Content

No Magic For You, Jack!

magicjackusbwidgetApparently Magic Jack has taken some steps to cease delivering service to people who access the service with clients other than bone fide Magic Jack dongles. This happened some time in the past week and has been noted in the PBX-in-a-Flash forums as well as the Unofficial Magic Jack Support Forums.

Some offer the conjecture that such treatment of customer will in some way hurt the company. I doubt that is the case. The percentage of their users using Asterisk to pass calls to them is likely extremely small. It’s also quite likely very obvious to them, both in terms of average minutes per user per month and the reported SIP client name.

Read More

Easy Asterisk in a Box: Jazinga VoIP PBX Appliance Reviewed

Originally published in December 2008 at Small Net Builder.

It has been nearly three years since I first published an article detailing my experience setting up an Asterisk server on an embedded PC platform. That turned out to be just the start of a wave of interest in the embedded system or “appliance” approach to Asterisk. Since then, a number of companies have offered ready-to-roll Asterisk appliances.

Many of these Asterisk “appliances” are really just pre-configured servers running a bundle of software built around Asterisk. To meet my definition of “appliance” the system should have no moving parts. That means diskless, fanless, silent and reliable.

Preconfigured servers are very capable but they often have much of the administrative overhead of an old-school Asterisk installation. They usually require someone with Asterisk or telecom experience to plan and implement a working system.

I have deferred upgrading my own Astlinux server a very long time. I knew it had to be done, but also knew that it would be essentially rebuilding the system from scratch. When Jazinga offered to let me evaluate their new Asterisk appliance, I saw the possibility of deploying something simpler, with less administrative overhead.

jazinga-product-shot

In their flagship MGA120 PBX appliance, Jazinga set out to build a device that could be installed in a typical small business, home or home office by someone with minimal IT skills. It combines common networking and IP telephony functions with software designed to make installation and administration truly easy.

Read More

VoIP Supply’s New Business Class IAX2 Hard Phone

Just a few days ago VoIP Supply announced a new desk phone that’s capable of both SIP and IAX2. Not much has been forthcoming in the way of IAX2 capable end-points, even though the protocol has wound its way through a lengthy standards process. Digium has dropped the little IAXy (aka S101i)  ATA device a while back. Last year Zeeek tried the Allnet 7960 which is IAX2 capable but lacking in some ways. So it seems that to date there just haven’t been any truly business class IAX2 phones to be had.

3-phones-480

Read More

New TDM-GSM Module For Asterisk

A short while ago Nir Simionovich noted an interesting new piece of hardware on his blog. It’s the embodiment of a novel approach to adding GSM based cellular trunks to an Asterisk server. As opposed to a freestanding external SIP-to-GSM gateway that I installed last year, someone has devised a new TDM-GSM module that emulates that FXO daughter card on a Digium TDM400P card. According to the companies web site two modules can be installed to a TDM400P card, providing Asterisk with two GSM trunks. No drivers are required beyond those loaded for the TDM400P.

Read More

Finally, We Have A 311 Solution

Figure 3: Portech MV-370 SIP-GSM gateway

In the spring of 2008 I installed a SIP-to-GSM cellular gateway as a means of backing up our wholly IP-based home and office phones. The installation of the cellular gateway allowed me to route calls to and from T-Mobile should our DSL circuit go down. In addition, it provided us access to 911 and 411 services that were not at the time provided by our ITSPs.

The one thing we wanted that it did not address was access to 311 service. In Houston a 311 call rings a non-emergency city call center that is intended to take notifications about city services. For example, we call 311 when we see a street light out, a broken fire hydrant, large fallen trees in the roadways or packs of wild dogs roaming dangerously.

Read More

Skype’s New SILK Wideband Codec Set Free

skype_logoThe release a couple of months back of the Skype v4.o client for Windows was noteworthy as the introduction of their in-house developed SILK codec. Earlier today during an eComm 2009 presentation Jonathan Christensen, Skype GM Audio & Video, announced that SILK was being released under a royalty free license.

SILK was notable as being capable of narrowband (8KHz), wide band (16KHz) and super-wideband (24KHz) sample rates. Skype claims the codec dynamically adapts both sample rate and bitrate in response to variable network quality. They have published a PDF with a very general overiew of codec performance expressed in terms of bitrates, CPU requirements and MOS scores.

Read More
Back To Top