Howler Technologies

As of July 20th 2010, Howler Technologies has ceased trading with immediate effect.


Howler Technologies product set is dedicated to two key objectives:

• “Turbocharging” Voice over IP (VoIP) systems
• Producing telecoms software that exploits multicore processors to make VoIP systems more flexible, upgradable and scalable

Howler Technologies current products provides G.729 transcoding solutions to the VoIP telecoms industry.

All G.729 Licenses from Howler Technologies Include Patent Royalties from the patent holder and are compliant with Open Source GNU General Public License (GPLv2). Howler G.729 Codecs are fully indemnified and legal for use on ASTERISK, FREESWITCH AND CALLWEAVER. A windows G.729 SDK is also available from Howler so you can integrate G.729 into your softswitch.

Purchase G.729 Codec for $8.99 per channel
G.729 Codec Free trial available

G.729 Product Set

G.729 is an industry-standard, Low Bit-rate codec (LBR), used in the majority of popular VoIP handsets and by many VoIP providers. G.729 uses significantly less bandwidth than the industry standard G.711 audio codec but maintains a high degree of audio fidelity, being designed for imperfect networks such as the Internet and WANs.

Howler’s products enable businesses to build cost effective Voice over IP Networks that typically handle More Calls, with Less Hardware, over the same Network service.

The initial product set supports the G.729 International standard for coding Voice over IP Calls. The key features of this include the use of about one eighth of the “bandwidth” needed by other systems using the G.711 coding supported by legacy Business Voice systems. The G.729 standard is also very effective when used on IP networks like the Internet.

Adoption of G.729 has been slow in the market due to the reality of having to face business issues such as handling legacy Fax machines and Call recording systems. Howler resolves that by undertaking real-time conversion, enabling businesses to exploit network services such as DSL Broadband lines for branch offices, maximizing the use of expensive but limited bandwidth private circuits nationally or internationally, and even the Internet as cost effective components in an overall Voice over IP solution.

Company Background

Howler’s products were architected from Day 1 to run as software applications on multicore silicon processors, to allow flexibility and future-proofing.
At the entry level, the “Howlet” products run on 32 and 64 bit processors such as Intel Xeon, allowing easy integration with systems based on standard PC hardware. For higher performance, the “Screamer” and “Banshee” products make use of the IBM/Sony/Toshiba “Cell” processor on cards that fit into PC systems using the industry standard “PCI” motherboard slots.

Unlike other offerings based on DSP silicon, these give an upgrade path and investment protection as a user seeks to increase capacity with growing VoIP demands. The “Screamer” product has been benchmarked at handling over 400 simultaneous calls on a standard Intel server, making it the industry leading offering for systems like “Asterisk” soft PBXs.

The use of a software approach in the Howler Framework System also allows simple field upgrades “future-proofing” the system as end user’s requirements evolve. This abstraction of the Howler system from the underlying hardware also gives new commercial benefits, such as the “floating” software licensing that means that the user only pays for the capacity in use, rather than the full cost of a production system with resilient backup processors. Similarly, the Howler framework provides simple adaption to handle other VoIP systems, such as the “Freeswitch” or CallWeaver” offerings or customized solutions for large IP Call Centres.

In summary, Howler truly “turbocharge” VoIP systems with a system that handles more calls over the same network using less hardware than other systems.

G.729 Floating License Explained

This is a robust, peer-to-peer system. All machines on the same subnet co-operate to select a license server. If this machine goes down, the remaining machines renegotiate to select a new license server. All the original licenses will then be available.

Note that if a machine goes down which is not the license server, nothing is affected (apart from a short delay before the licenses in-use on that machine become available again).

Howler floating license rely on UDP broadcast on the subnet to find the other nodes. After this, a low-latency point-to-point UDP-based protocol is used.

See also:



Other Resources


Asterisk server supports it in pass-thru or with a license


Official website


Where to Buy


UK & Worldwide - VoIPon - Best Prices and Support on Howler Technologies - Call for reseller pricing or International Shipping. VoIPon.


As of July 20th 2010, Howler Technologies has ceased trading with immediate effect.


Howler Technologies product set is dedicated to two key objectives:

• “Turbocharging” Voice over IP (VoIP) systems
• Producing telecoms software that exploits multicore processors to make VoIP systems more flexible, upgradable and scalable

Howler Technologies current products provides G.729 transcoding solutions to the VoIP telecoms industry.

All G.729 Licenses from Howler Technologies Include Patent Royalties from the patent holder and are compliant with Open Source GNU General Public License (GPLv2). Howler G.729 Codecs are fully indemnified and legal for use on ASTERISK, FREESWITCH AND CALLWEAVER. A windows G.729 SDK is also available from Howler so you can integrate G.729 into your softswitch.

Purchase G.729 Codec for $8.99 per channel
G.729 Codec Free trial available

G.729 Product Set

G.729 is an industry-standard, Low Bit-rate codec (LBR), used in the majority of popular VoIP handsets and by many VoIP providers. G.729 uses significantly less bandwidth than the industry standard G.711 audio codec but maintains a high degree of audio fidelity, being designed for imperfect networks such as the Internet and WANs.

Howler’s products enable businesses to build cost effective Voice over IP Networks that typically handle More Calls, with Less Hardware, over the same Network service.

The initial product set supports the G.729 International standard for coding Voice over IP Calls. The key features of this include the use of about one eighth of the “bandwidth” needed by other systems using the G.711 coding supported by legacy Business Voice systems. The G.729 standard is also very effective when used on IP networks like the Internet.

Adoption of G.729 has been slow in the market due to the reality of having to face business issues such as handling legacy Fax machines and Call recording systems. Howler resolves that by undertaking real-time conversion, enabling businesses to exploit network services such as DSL Broadband lines for branch offices, maximizing the use of expensive but limited bandwidth private circuits nationally or internationally, and even the Internet as cost effective components in an overall Voice over IP solution.

Company Background

Howler’s products were architected from Day 1 to run as software applications on multicore silicon processors, to allow flexibility and future-proofing.
At the entry level, the “Howlet” products run on 32 and 64 bit processors such as Intel Xeon, allowing easy integration with systems based on standard PC hardware. For higher performance, the “Screamer” and “Banshee” products make use of the IBM/Sony/Toshiba “Cell” processor on cards that fit into PC systems using the industry standard “PCI” motherboard slots.

Unlike other offerings based on DSP silicon, these give an upgrade path and investment protection as a user seeks to increase capacity with growing VoIP demands. The “Screamer” product has been benchmarked at handling over 400 simultaneous calls on a standard Intel server, making it the industry leading offering for systems like “Asterisk” soft PBXs.

The use of a software approach in the Howler Framework System also allows simple field upgrades “future-proofing” the system as end user’s requirements evolve. This abstraction of the Howler system from the underlying hardware also gives new commercial benefits, such as the “floating” software licensing that means that the user only pays for the capacity in use, rather than the full cost of a production system with resilient backup processors. Similarly, the Howler framework provides simple adaption to handle other VoIP systems, such as the “Freeswitch” or CallWeaver” offerings or customized solutions for large IP Call Centres.

In summary, Howler truly “turbocharge” VoIP systems with a system that handles more calls over the same network using less hardware than other systems.

G.729 Floating License Explained

This is a robust, peer-to-peer system. All machines on the same subnet co-operate to select a license server. If this machine goes down, the remaining machines renegotiate to select a new license server. All the original licenses will then be available.

Note that if a machine goes down which is not the license server, nothing is affected (apart from a short delay before the licenses in-use on that machine become available again).

Howler floating license rely on UDP broadcast on the subnet to find the other nodes. After this, a low-latency point-to-point UDP-based protocol is used.

See also:



Other Resources


Asterisk server supports it in pass-thru or with a license


Official website


Where to Buy


UK & Worldwide - VoIPon - Best Prices and Support on Howler Technologies - Call for reseller pricing or International Shipping. VoIPon.


Created by: pbriffett, Last modification: Wed 21 of Jul, 2010 (04:59 UTC) by Jimster
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