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Is modern paging an oxymoron? How pagers work in 2020

October 12, 2020

In recent years, smartphones and tablets have become an integral part of clinical communications. Yet even today, no mobile communication technology is more reliable, survivable, and affordable than the pager. In fact, pagers are filling a crucial role in the response to COVID-19—you can learn why pagers are still so crucial in healthcare today in this previous blog post.

To truly understand the value of pagers for the healthcare system, it’s important to understand a few things: how a pager works, what a paging network is, how modern paging differs from the paging you might remember, and how a hospital or clinical setting can best leverage the capabilities of modern paging.

How does a pager work?

A pager is a small telecommunication device that receives radio signals from the paging network. In the case of two-way pagers, radio signals may be sent from the device as well.

Transmitters in the paging networks broadcast signals over a specific frequency. Pagers that are physically in range of the transmitters listen to the signal from the transmitter. When your pager hears its unique address, it receives the message and alerts you (via an audible signal and/or a vibration, depending on pager settings).

Learn more about how pagers work in this infographic.

What is a paging network?

There are two types of paging networks:

  1. On-site systems use low and high-power transmitters to send local messages or for in-house notifications, similar to the kind used at a restaurant to let you know that your table is ready.
  2. Wide-area networks rely on high-powered transmitters across the country for nationwide coverage.

Paging networks are superior to cellular networks in a lot of ways. Notably, paging transmitters use high frequency radio signals with antennas that are typically located high off the ground so they can extend farther with fewer transmitters and less interference. That’s why pagers are so well-suited to a hospital setting where thick concrete walls and basement facilities often make cellular service unreliable. Paging networks also use multiple towers simultaneously, providing overlapping (read: more reliable) coverage.

How is modern paging different than its earlier days?

Modern paging networks use sophisticated satellite connections between the core messaging network and transmitter towers. This bypasses vulnerable telephone and RF link networks, providing a higher degree of efficacy and security.

Unlike the “old” days of paging, which required an infrastructure of dedicated wired phone lines and RF link transmitter systems, most modern paging is 100% digital using common IP protocols.

What do I need to know in order to make paging work best for my organization?

Not all paging systems are created alike. Chief concerns include efficacy/coverage and security.  The most secure and reliable paging networks rely on a checkerboard pattern of transmitter sites. This is the approach that Spok employs for its industry-leading paging services.

Since hospitals and clinical settings are bound by HIPAA and other regulations, proper data encryption is essential. Today, some pagers (like the Spok T5 and T52) support message encryption using the AES-128 encryption algorithm, which is the industry standard. With these pagers, each device is programmed with a unique encryption key. Messages are encrypted as they enter the Spok network, sent over the satellite network to the transmitters and then sent over the air to the device, where they are decrypted for display to the user.

Whether you need to communicate a system-wide emergency message or let one person know that there is a front desk delivery for them, paging is a fast, efficient, cost-effective and unobtrusive solution.

For more information, read 4 things to know about paging architecture in this infographic.

 

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By John Deboer, Vice President of Technology Engineering
John joined Spok in 1999 and has more than 25 years of experience in the telephony, paging, and wireless technology fields. At Spok he has held numerous positions, including vendor manager and director of program management. Prior to joining Spok, he worked at Alcatel and Glenayre Technologies in international sales engineering and project management roles. He holds a Bachelor of Engineering degree in electrical engineering from Lakehead University in Ontario, Canada.