Without the ability to monitor each sign in a digital signage network from a central location to confirm playback, achieving confidence in the performance of the network will be next to impossible.

One day when I was in college many years ago, I took my handy cassette recorder to class because I knew my professor was going to be covering some particularly important material that I would want to review in detail before my next exam.

That's not to say I wasn't well versed in the Roman numerals, capital letters, Arabic numerals and the finer points of outlining. It's just that for this particular class I wanted to get every detail. (I'm clearly showing my age. My college-aged kids turn to Blackboard and other online tools for notes and PowerPoint presentations of their professors' lectures.)

Imagine how disappointed I was when I returned home in the evening, rewound my cassette and for whatever reason there was no audio of the lecture. What I needed - although I didn't know it at the time - was the ability to do what audio engineers call "confidence monitoring." In other words, I needed the ability to listen via an audio jack and an earpiece to the actual audio as it was being recorded to tape.

Fast forward to today and to the topic at hand, namely digital signage networks. A critical element of effectively managing a digital signage network is the ability to monitor playback of scheduled content on each monitor in the network - sort of a visual confidence monitoring. For the digital signage network manager, having the ability to look across the entire network, which might stretch across a campus, throughout an arena, or even across the entire nation, to confirm playback makes the seemingly impossible quite doable and improves productivity of the entire enterprise.

Rather than relying on someone else who happens to be working within viewing distance of each monitor in the network to notice a problem and then report it to the digital signage network manager, a manager in the network operations center has the ability to view what's playing back on any given monitor in the network from the network operations center (NOC).

Often, the digital signage network software that makes this happen will display thumbnail images of multiple monitors, any of which can be enlarged with a simple mouse click. Frequently, the software also makes it easy for managers to group thumbnails in a logical manner. For instance, thumbnails of all of the monitors in a particular building, on a specific floor or in a certain type of application, can be assigned to the same group so that it's easy and convenient for a manager to confirm that all is well with any given grouping of monitors.

Confidence monitoring paired with software capabilities to log playback is particularly important for digital signage ad networks. For these networks, having the ability to prove to customers that advertising ran as scheduled on the network is essential. Similarly, monitoring playback and documenting those instances when an ad failed to run as scheduled gives the ad network the ability to schedule make-goods and in the process build and win the trust of customers.
 
More decades have passed than I care to admit from my first encounter with the consequences of not having adequate confidence monitoring, but the lesson is as relevant today in the realm of digital signage as it was back then with my broken cassette tape. Without the ability to monitor the performance of technology as it apparently goes about fulfilling its function, it is ultimately impossible to have confidence in that technology.

Having access to remote control over display functions like "on" and "off" can save time, effort and expense.

Sometimes what should be obvious isn't so till someone points it out. For instance, just the other day I was listening to a favorite radio program that I stream on the Internet when the topic of surprise endings of films came up.

The sidekick of the show's host identified the movie "Planet of the Apes" as one with a surprise ending. But the real surprise of that radio segment came when it became clear that while the sidekick recognized the movie had a surprise ending, he had no clue that the surprise was Charlton Heston discovered he was actually on Earth throughout the film.

When the host of the show understood his sidekick's failure to see the obvious, the real fun began. He had loads of laughs over the fact that his sidekick -from the time he first saw the movie, released some 40 years before- had not recognized the obvious till that very moment on air.

But haven't we all at one time or another found ourselves in exactly the same position as the sidekick -not recognizing the obvious, which stares us in the face, till someone else points it out to us?

Such is the case with digital signage network management and remote control over simple display functions, such as "on" "off" and "volume." Many displays come with RS232 ports that allow these functions -and others, such as changing the channel, which probably isn't important in this context- to be controlled remotely. This interface and the need for control over these functions should be obvious but might go overlooked without an understanding of why controlling them is so important.

Imagine having dozens or even hundreds of displays scattered throughout a university campus, shopping mall or sports arena. Having the ability to turn individual monitors, sets of monitors, or all monitors on or off at a given time is a good way to manage display life, minimize energy consumption and even play an important role in targeting vital information when emergency situations arise.

Rather than having to walk the venue and manually turn monitors off in the evening and on in the morning, digital signage network administrators can rely on serial remote control of basic on/off functionality to save time and improve operational efficiency.

When an emergency arises -particularly during off hours when only skeleton crews may be occupying a given building- having the ability to remotely turn on displays previously shut off for the evening so warnings about emergency weather conditions or other contingencies can be displayed can become a matter of life and death.

Remote control over volume can be important as well. Sometimes professors or teachers in an educational setting, passersby at public venues, like malls, and even employees in corporate settings may manually adjust the volume of the display outside the digital signage network administrator's desired level.

As with on/off functionality, controlling volume from a central location through serial commands to the display reduces the time needed to make adjustments and saves a lot of legwork.

Is the importance of controlling on/off and volume functionality obvious? Probably. But for those who may have been having a "Planet of the Apes" moment when it comes to having remote control from a network operations center over these basic functions, I hope this column produced an important "ah ha."