John Crawford

John Crawford

Recent Posts

What is DTMF and How Does it Work in a VoIP Environment?

[fa icon="calendar'] Sep 21, 2017 4:33:52 PM / by John Crawford posted in Glossary

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What is E911 and How Does it Work for VoIP Calls?

[fa icon="calendar'] Sep 20, 2017 9:15:00 AM / by John Crawford

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E911 is short for ‘Enhanced 911’. It’s a system used within the USA to provide emergency services to callers who dial 911 from wireless and IP phones. The original 911 service was first established in 1968, and support was extended to wireless and VoIP phones in 2005.

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What is a Codec? G.729 vs. G.711

[fa icon="calendar'] Sep 12, 2017 11:57:50 AM / by John Crawford posted in Glossary

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The word ‘codec’ has two meanings in the technology world.

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An Insider's Guide to the Conference Bridge

[fa icon="calendar'] Sep 7, 2017 9:00:00 AM / by John Crawford posted in Glossary

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What is Call Park and How Can it Improve Customer Service?

[fa icon="calendar'] Sep 5, 2017 12:10:25 PM / by John Crawford posted in Glossary

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The SpectrumVoIP Call Park feature lets you place a call on hold and ‘park’ it in the cloud, freeing up your phone and allowing the call to be picked up on a different extension by another employee. This is a useful feature for minimizing caller hold times and improving customer service.

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What is POE (Power Over Ethernet) and How Does it Work?

[fa icon="calendar'] Aug 30, 2017 10:03:00 AM / by John Crawford posted in Quality of Service, Glossary

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Power Over Ethernet is a technology that enables electrical current to be transmitted over standard Ethernet network cables rather than traditional power cords. POE is a convenient way to supply power to devices like VoIP phones, security cameras and RFID readers, without having to install dedicated electrical wiring.

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What is QoS and how does it enhance your call quality?

[fa icon="calendar'] Aug 28, 2017 11:53:11 AM / by John Crawford posted in Quality of Service, Glossary

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QoS (Quality of Service) describes a concept whereby data bandwidth and error rates can be measured, improved and guaranteed. QoS is especially important to real-time traffic like voice and streaming multimedia, where any data loss or delay would result in unacceptable audio or image quality. Delivering sufficient QoS is an essential aspect of modern IP networks.

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Monthly VoIP News Roundup: Top Stories for August 2017

[fa icon="calendar'] Aug 23, 2017 10:45:00 AM / by John Crawford posted in VoIP News Roundup

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In the fast-moving world of VoIP, there’s a constant stream of interesting headlines making the news each week. At SpectrumVoIP, we like to stay informed about the latest developments and share our insights with our clients, business partners and readers. This is our voip news roundup for August 2017, where we summarize the top stories that piqued our curiosity over the past month.

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Potential Pitfalls of Wireless and Cellular VoIP and How to Avoid Them

[fa icon="calendar'] Aug 18, 2017 1:20:00 PM / by John Crawford posted in Quality of Service

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Voice over IP can deliver impressive savings on your phone service by enabling you to place calls over an IP network instead of using the traditional PSTN. It's also possible to run VoIP over wireless and cellular technology, with many cellular carriers offering hybrid handsets that can seamlessly switch to VoIP over Wi-Fi when a wireless network is in range - even while a call is active. By installing applications like Skype for Mobile, these devices can bypass the cellular network to make low-cost calls over the Internet from your home, office, or free public Wi-Fi hotspots 

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Why Traffic Shaping is Important for Your Voice over IP Traffic

[fa icon="calendar'] Aug 14, 2017 9:15:00 AM / by John Crawford posted in Quality of Service, Traffic shaping, voice over IP

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Traffic shaping (also known as bandwidth shaping or packet shaping) is a method of regulating network data flows to ensure a consistent throughput or quality of service (QoS) for specific applications. It involves delaying the transfer of low-priority packets while expediting the transfer of high-priority packets to achieve a desired traffic profile. Restricting the flow of incoming packets is called bandwidth throttling or bandwidth policing, and restricting the flow of outbound packets is called rate limiting.

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VoIP Dictionary
Technical glossary of terms defined in one simple dictionary. 

VoIP Dictionary