iDevices are getting used in innumerable ways these days. Some years back you may recall my examination of the Mocet Communicator, an iPad accessory that turned it into an executive desk phone. Behringer’s X AIR XR18 is an audio mixer with iDevice remote control. The Cerevo LiveWedge is a video production switcher with an iPad-centric control scheme. These are just a few examples of iDevices assuming a key role in the control scheme of a more sophisticated device.
What the Mocet device highlighted is that dependence upon Wi-Fi is not always an optimal solution for connectivity. It provides Ethernet connectivity and could be powered using standard 802.11af power-over-Ethernet.
Recently, Redpark introduced a power-over-Ethernet capable Gigabit Ethernet adapter for the iPad. For just $99 this device provides both continuous power and reliable connectivity via the same length of Ethernet cable.
While supporting 10/100/1000 Mb Ethernet networks, the USB subsystem of the Lightning port delivers 225 Mbps. The interface is 802.11af compliant, capable of drawing up to 15.4 watts from the network line to keep the iDevice charged.
A single solution to providing reliable power and connectivity strikes me as massively appealing. I can see this as useful in any situation where an iDevice is in a dedicated application.
P.S. – I’ve also found Google’s combination AC adapter and Ethernet interface for first generation Chromecast to be profoundly useful. It makes the Chromecast dramatically more reliable. The newer Chromecast Ultra includes this optional power supply.
Over the years I’ve come to admire 802.3af standard power-over-Ethernet (aka P.O.E.), even for small- or home-office applications. What follows is an introduction to the topic, and some novel ideas about its use in possibly unexpected applications.
IEEE 802.3af Power-over-Ethernet is the industry standard approach to delivering DC power to network attached devices. Given a P.O.E.-capable switch, or a P.O.E. inserter, DC power is delivered over the same Ethernet connection that provides connectivity. Thus one wire is all that’s required to a distant device on the network.
Continue reading “SOHO Tech: Power-Over-Ethernet is Awesome!”
Some time ago I received a Raspberry Pi B+ as a gift. It had been on my amazon wish list, and for good reason. It looked like one practical approach to emulating the venerable Logitech Squeezebox, which to this day serves as the basis for music playback hereabouts.
Since we were not expanding our music playback scheme there was at first little motivation to got ahead with this effort. That is, until the analog outputs of our existing fleet of Squeezeboxes started to fail. Eventually the analog outputs become unusable, the result of failing electrolytic capacitors. Three of our five SB3s now suffer this malady.
So, not long ago I set to the task of emulating a Squeezebox using a Raspberry Pi 2 Model B, a HiFiBerry DAC and a 4 GB micro-SD memory card. To this core I added a suitable case, a power-over-Ethernet splitter and piCorePlayer. All in, this rig cost under $100.
Continue reading “My First Raspberry Pi Project: Using Hifi Berry DAC to Emulate A Squeezebox”
The .e4 blog has a good new post on power-over-ethernet, which I see as an often overlooked area of SOHO VoIP. It goes into some detail P.O.E. network switches, power management and mid-span P.O.E injectors.
Just last week we suffered a power outage that took down my entire office for about two hours. That is, it took down everything that wasn’t on the UPS. At the time I was on a tech support call with a customer. Happily, my IP650 and all the core network components get UPS power, some via P.O.E.. The UPS power only lasted about 45 minutes, but that was enough to let me resolve my tech support situation.
While some of our larger offices have P.O.E. capable network switches I use a couple of simple single-port mid-span power injectors from Aastra. Why? They’re simply a better, and more cost effective solution for my small office. I only need to power a couple of devices over the ethernet, just my Polycom desk phones. However, I need gigabit ethernet bandwidth in a number of places. POE capable gigabit switches were on the expensive side when last I reworked the office network. In contrast, single port power injectors can be had for around $40 each.
It started out an uneventful day, the third day in an entire week that I expected to spend in my home office. That’s something of a rarity in recent times. I was enjoying it, catching up on matters around here, and addressing tech support calls as they arose. I was on just such a call when, to my considerable surprise, the power went out.
The sudden loss of power is not enough to disrupt my phone call beyond my own expression of surprise. As I’ve documented elsewhere, I’ve taken steps to ensure that critical infrastructure around here is on a UPS. To paraphrase Frank Herbert, “The electrons must flow.” In fact, it occurred to me that this afternoon was an opportune time to ascertain just how sound my planning had been.
Continue reading “The Day The Electrons Stood Still”
A couple of days ago Garrett Smith posted on his blog entry stating, “One More Reason Pure VoIP is Not The Way to Go.” He goes on to describe a weather event that took out his power, internet access, and therefore his VOIP service.
I was born in the Niagara Region on the Canadian side of the border. I lived for 15 years in Toronto as well as 10 years in deep Northern Ontario. I’ve known winter in all its majesty.
In my former life as a kite enthusiast I made the drive from Buffalo, NY to Erie, PA through many a winter storm. And they certainly do get blasted from time-to-time in that part of the country.
Continue reading “When The Lights Go Down”