Telephony

Newbie's SIP Navigation Guide for Asterisk: Is It Safe?

Newbie’s SIP Navigation Guide for Asterisk: Is It Safe?

Monday, September 9, 2013

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It’s Back to School Time at Nerd Vittles today with a wrap-up of our series exploring the symbiotic relationship between SIP and Asterisk® including the most important consideration of all: SIP Security 101, a quick-and-dirty look at the security implications of using SIP with Asterisk. If you read nothing else before you begin your VoIP adventure, move today’s article to the top of your list. It might save you a personal fortune! Think of it as winning the lottery without… Read More ›

A Second Look at Grandstream's UCM6100 Asterisk PBX & Some SIP Surprises

A Second Look at Grandstream’s UCM6100 Asterisk PBX & Some SIP Surprises

Tuesday, August 27, 2013

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What a difference a couple months make! For those that are keeping an eye on the UCM6100 Asterisk® PBX from Grandstream, we wanted to provide some additional insights based upon two firmware updates that Grandstream has released since the PBX was first introduced earlier this summer. The short version of this story is Grandstream has addressed most of the open source issues and they’ve resolved well over a hundred bugs. In addition, they’ve published excellent documentation on the PBX in… Read More ›

Practicing Safe SIP: Adding SIP URI and Free DID Connectivity to Asterisk

Practicing Safe SIP: Adding SIP URI and Free DID Connectivity to Asterisk

Monday, August 19, 2013

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Last year, we began our exploration of safe SIP options for Asterisk® by introducing a hybrid solution using VoIP.ms for a registered SIP trunk and IPkall for a free DID. Today, in addition to a free IPkall DID to accept incoming PSTN calls, we have a slightly different approach that provides a direct SIP URI address from Sip2Sip.info for your server. As with the original tutorial, today’s implementation preserves our Zero Internet Footprint™ design for total SIP insulation of your… Read More ›

2013 Greatest Hits: Lenny Returns for an Encore Performance

2013 Greatest Hits: Lenny Returns for an Encore Performance

Monday, August 12, 2013

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Nothing in the VoIP community this year quite captured the hearts and minds of geeks around the world like Brian West’s "Lenny." For anyone that’s ever been dogged by obnoxious telemarketers or that’s had to deal with less than lucid tech support inquiries, Lenny was a godsend. Finally, we all had a place to send those poor souls while getting our daily chuckle listening to the results. If you’re late to the party and missed all the fun, then start… Read More ›

Introducing NeoRouter 1.9 VPN: Still a Shining Star

Introducing NeoRouter 1.9 VPN: Still a Shining Star

Tuesday, August 6, 2013

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In a previous article, we introduced PPTP VPNs for interconnecting remote users and branch offices to a central network hub. Known as a hub-and-spoke VPN, the advantage of this design is it lets remote users participate as peers in an existing home office LAN. It’s simple to set up and easy to maintain. The drawback is vulnerability to man-in-the-middle attacks. Today, we want to revisit the more traditional client-server VPN which relies upon a central server but uses a star… Read More ›

Introducing the Grandstream UCM6100 Asterisk PBX: So Close But So Far Away

Introducing the Grandstream UCM6100 Asterisk PBX: So Close But So Far Away

Tuesday, July 30, 2013

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UPDATE: Here’s a newer Asterisk appliance for under $30. Grandstream has done with Asterisk what Samsung and others did with Android. You basically take a freely available, open source toolkit and transform it into a terrific piece of turnkey hardware with tremendous savings in development costs. While it’s great for consumers, to us it highlights what is wrong with the GPL2 license which lets companies do this in the first place. These for-profit companies give almost nothing back to the… Read More ›

Taking a Page from Asterisk: How Far We Have Come

Taking a Page from Asterisk: How Far We Have Come

Monday, July 22, 2013

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We’ve never written about paging technology before, and this is one of those areas of VoIP telephony where it certainly paid to wait. What a difference a few years makes! At least in the Asterisk® context, SIP-based paging traditionally involved issuing a Page command with a list of extensions in your dialplan. The wrinkle was that each VoIP phone manufacturer had its own SIP header to trigger autoanswer on its phones. And, without autoanswer, paging becomes next to worthless with… Read More ›

Programmer's Paradise: Introducing the VoIP Phone of the Year, Yealink's T46G

Programmer’s Paradise: Introducing the VoIP Phone of the Year, Yealink’s T46G

Monday, July 15, 2013

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If you’ve been missing the Aastra programming platform these last couple years while America’s patent trolls continued to destroy the software development community in the United States, then you’ll be excited to learn that there’s a new kid on the block with a revolutionary phone. One can’t help wondering what the heck we are doing to ourselves. First, we destroy the programming community with tax breaks for off-shore developers, and then we grant bogus software patents for "inventions" that have… Read More ›

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