Grandstream GRP2613 Will Not Dial Out But Can Receive Calls

I just came across a rather unusual situation where I could not place calls but I can receive them. This was with a Grandstream GRP2613 (FW using as the VoIP provider. After examining packet traffic I found unexpected information in the SIP header and traced it to some settings under Account–>SIP Settings–>Custom SIP Headers. Specifically, I disabled “Use X-Grandstream-PBX Header” and “Use P-Access-Network-Info Header” which default to be enabled. Please see image below.

















Just wanted to share this in case anyone else runs into this problem.

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Integrating Big Data is Like Mixing Oil and Water

Oil and Water Don't MixI have never liked the term ‘big data’, it tends to be an overused buzzword. I prefer the term ‘large unstructured data’ because it is a more accurate definition. As one might expect, it is difficult to effectively combine structured data with unstructured data, in many ways it is like mixing oil and water. If you put oil and water together in a jar and shake it, you will get a mixture but it is unstable and useless for pretty much anything. Data is much the same. You cannot just mash everything together and expect to gain useful insights, you need the right approach. (more…)

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Adding LED Headlights to a Riding Lawnmower

Setting Sun

ledAs the days get shorter it is harder to get all the yard work done before the sun sets, leaving me with a half finished lawn. Once we roll back an hour with daylight saving time, it is almost impossible to get anything done after work. The ‘lights’ on my lawnmower are nothing more than a couple 1156 bulbs behind a plastic cover that blocks most of the light; these lights are not effective in dim or dark conditions, hence my need for a better lighting solution.

If you are looking to add some lights to your lawnmower please read on, perhaps my project can be of some help to you. (more…)

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Data Storage Risks, and How To Prevent a Data Breach

The Student Loan Data Breach

studentloanA topic I find particularly interesting is the student loan data breach of 2012. The incident involves a dataset containing personal information of 583,000 Canada student loan borrowers, stored on an external hard drive. The dataset was not encrypted and the hard drive was stored in an unlocked filing cabinet. The hard drive was reported missing in 2012, this kicked off a series of events including a public statement concerning the breach, an RCMP investigation, and a class action lawsuit against the government. (more…)

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