Alan Percy : The SIP Invite
Alan Percy
| Observations by Alan D. Percy on VoIP enabling technology, industry and our personal reach for success.

IoT Connectivity Standards? Still a Confusing Mess.

62 million European households will soon have smart gas meters as reported on IoT Evolution with an annual growth rate of 27.8...

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Digital Transformation Gone Wrong: Did Macy's Fail?

Amazon will be moving into six floors at 300 Pine Street, a historic epicenter of Seattle retail, home to Macy’s. In fact,...

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Mazda Rotary Engine to Cease Electric-Range Anxiety

The rotary or Wankel engine is an automotive marvel. It revs higher than an engine with cylinders and weighs far less. It...

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Invoxia NVX 200 Phone Connects to Apple Watch 3

Forget Dick Tracey, Invoxia takes your watch phone one-step further by allowing you to use a desk phone as the interface to...

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Network Slicing - An A La Carte Network Service in 5G?

I’ve been meaning to write about network slicing for a while.  When 5G was first being written about, network slicing was one...

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Thanks to Actility, Comcast may Build Largest U.S. LoRa Network

There is a race to roll out the largest LoRa network as eventually trillions of devices will need a low-power way to...

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SIP at Astricon

September 24, 2008

I'm here at Astricon in sunny Glendale, AZ with the diverse Asterisk community talking about using SIP to improve the reliability and scalability of Asterisk.  

We had a full room this morning during our session sponsored by both ScanSource and AudioCodes, discussing different architecture tricks to improve reliability of Asterisk solutions and spread out the risk with the goal of avoiding a "career affecting" event.

A quick summary of our recommendations:
  1. Use redundant and commercial grade servers to avoid simple power supply and fan failures from taking out the whole system.  
  2. Use a distributed SIP architecture to separate the Asterisk server, media gateway and phone devices.
  3. Implement a load-balancing scheme to spread the traffic over both Asterisk servers and dual media gateways.
  4. Use Dundi to keep the dual Asterisk servers synchronized and allow them to cover for each other.
  5. ...and many other helpful tips....
We had a number of interesting questions about how Asterisk handles routing the RTP streams around the application server, enabling mid-call fail-over in the case of an Asterisk crash.

For more details and/or a copy of the presentation, visit the AudioCodes micro-site on the ScanSource web site at:

More on Universal Broadband

August 20, 2008

An interesting article in today's USAToday about FCC Chairman Kevin Martin's efforts to expand access to the Internet to more Americans.  If you've been following along, you know that I've been writing and talking about the importance of Universal Broadband for the health and wealth of all Americans.

Many that live in urban and suburban America don't realize this, but once you leave most metro areas, broadband access to the Internet is very difficult to get and very expensive.  I know this first hand because I've been trying for years to get broadband access to a summer cottage that our extended family shares.  We can get phone service, but for broadband we have only one option - Satellite - and frankly, that's not a good option due to the 3 second latency.

When I spend time with other year-round residents in the neighborhood, I'm amazed at the difficulty they have in doing what we consider every-day activities.  This effects not just the entertainment part of the Internet, but real business too.  Weather forecasts for farmers, tax information and filing, educational materials are all very difficult (if not impossible) to accomplish with dial-up Internet access.

However, I do struggle with the "free wireless" idea that FCC Chairman Martin is pushing in his interview.  Nothing is ever free and the complexity of installation and operation of a wireless network needs to be professionally managed and supported (partially) by those using it.  

I'd rather see an approach that provides incentives for the existing wire line and wireless operators to expand their infrastructure and coverage to Universal Broadband.  

Universal Broadband is actually very good for our industry as it will speed up the transition of all telephony over to VoIP, increase demand for ATAs and core network media gateways, softswitches and other supporting systems.

Frankly, we just need the leadership - I hope that FCC Chairman Martin can find the common ground to get the operators to support the concept of Universal Broadband without starting a fight over "free wireless".

Mediant 1000 MSBG Webinar Recordings and Q&A

June 13, 2008


Thanks everyone that joined us during the webinars he hosted during this last two weeks. Your participation and questions made the sessions a learning experience all around.

If you missed one of the webinars, you can View a Recording.

AudioCodes launches MSBG product line

June 2, 2008

Today the covers came off our new Multi-Service Business Gateway (MSBG) product and our roadmap to connecting SIP Service Providers and SIP Enterprises together.

What is an MSBG you ask?  A multi-service business gateway is the union of five distinct functions that to date required separate boxes.  Network Access, Routing, Session Border Controller, VoIP Gateway and Application Server all in one device.

Why one device?  Today service providers and large enterprises need these separate functions, but stacking a number of boxes from different vendors has some real problems. 

SIP Survivability and Security - Q&A

May 13, 2008

Thanks to all of you that participated in last week's webinar on SIP Survivability and Security, especially those that posed some great questions.

For those of you that missed the live event, you can find a link to the recording at:

As promised, find below the Q & A that we were unable to address during the live event:

Q: Do / Will we offer FLASH hard drives for the M1k OSN? A: We have been asked about this before, but once we looked into the cost/benefit balance, both our customers and product management team decided not to proceed.  We're always monitoring the storage market and would be interested in knowing more about applications that require the level of hardened storage that FLASH drives offer.    Q: Are there plans to support LDAP for user authentication in the future? A: At this time we only support RADIUS   Q: Is audiocodes already, or  in the process of becoming a member of any of the voip security organizations, VOIPSA, etc.? A: AudioCodes is a member of and monitor the activity at many different industry organizations (including the SIP Forum), but we are not currently members of the VOIPSA.   Q: Is there any plans to implement S/MIME encryption in addition to SIPS?

SIP Survivability and Security Recording is Now Available

May 9, 2008

VON - End of an era

May 8, 2008


I've been holding my tongue on this topic for since word first got out that PulverMedia had been shut down by it's investors.  I figured that like most rumors, they were only partially true.  In this case, it seems they were true.  The resumes are rolling into our marketing department - confirming what was reported.

Somehow the end of VON has hit me in a way I didn't expect. 

SIP Survivability and Security

May 6, 2008

 In all my travels and discussions with both Enterprise and Service Provider customers, one topic of discussion that gets far more attention than all the others is SIP Survivability and Security.  It seems that all the benefits of SIP have opened up many new applications and network configurations that solve service and scalability barriers.  However, now that SIP has entered the real world, there are some serious challenges that remain....

I'd like to invite you to a discussion on these challenges and share with you some interesting solutions.

Join me Wednesday, May 7th at 2 PM EDT for 

"SIP Survivability and Security"

With the increasing adoption of SIP in the enterprise and service providers, many network designers have been engineering solutions around SIP, leveraging the flexibility and modularity advantages. However, those same designers also have concerns about survivability and security.

Keeping in Touch

May 5, 2008

Apple opens up the iPhone

March 17, 2008

It's with great pleasure that I read about Apple opening up the Apple iPhone and iPod Touch platforms to developers this week.  This move surely is due to pressure from the iPhone user community (and trying to keep up the the Microsoft Mobile developer community)

If you participated in my session at Internet Telephony this January, you know how strongly I believe this is a big deal.  History has shown over and over again that allowing the creative minds of application developers to fill market needs is the best way to expand the market and build new solutions. 

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