Blog

Comparison of IP Intercoms

Pros and Cons of Different types of IP Intercoms

Intercom Door man in field concept

There are two types of intercoms.  The first type connects many intercoms to a number of central computer stations, while the second type connects one intercom to many smartphones or VoIP phones.

In general, IP intercoms can be used to notify you that someone is at the door or provide communication between many locations (like schoolrooms) and a central office.  The intercoms are all wired to the local area network.

These complete systems enhance your total security, assuring a safe environment in this uncertain world.  Here is a comparison of the different systems available.

Continue reading “Comparison of IP Intercoms”

Surge Protectors for Network Attached Devices

network-lightning-protection

How to Protect Your IP Security Systems from Power Transients

Surge protectors protect network-attached devices from power transients. Lightning is only one of the many power disturbances that can damage these IP devices.

There are a number of surge protectors available that can be used to minimize the damage from these power transients.

Surge protectors protect network-attached devices from power transients.  Lightning is only one of the many power disturbances that can damage these IP devices.   There are a number of surge protectors available that can be used to minimize the damage from these power transients.

Anything that’s attached to your network, can be affected by power surges.  For example, your computer, door access system, IP camera, network switch, and router can be affected if there is a power spike.  Transients can occur not only on the power lines but also on the data connections.  Surge protectors, from Ditek, are used to suppress the effect of these power spikes.

Here’s a summary of the surges and spikes that can occur, and how you can protect your equipment.

Continue reading “Surge Protectors for Network Attached Devices”

Technical Jokes and Cartoons – 25

cartoon-take-stairs

I promise you cannot read these and not laugh out loud.  These are real notes written by parents in the Memphis school district.  Spellings have been left intact.

Please excuse Roland from p.e. For a few days.

Yesterday he fell out of a tree and misplaced his hip..

John has been absent because he had two teeth taken out of his face.

Chris will not be in school cus he has an acre in his side

Please excuse ray Friday from school.. He has very loose vowels.

Please excuse tommy for being absent yesterday. He had diarrhea, and his boots leak.

Continue reading “Technical Jokes and Cartoons – 25”

How IP Intercoms Communicate with Smartphones

IP Intercoms for Mobile Applications

By Bob Mesnik

IP intercom illustration

Smart IP intercom devices are making it easier to control access to your home, business, school, or any other organization.  They use your smartphone to see the person at the door, talk to them, and allow entry (or not).

There are single-button intercoms and multi-tenant intercoms. Both versions have built-in IP cameras. The IP intercom systems can use local intercom servers as well as remote cloud servers to provide the communication path between the intercom and the smartphone. These systems utilize various protocols such as VoIP SIP protocol, audio over IP, IP video, or other protocols to establish the connection between all the devices.

Smart IP intercom devices are making it easier to control access to your home, business, school, or any other organization.  They use your smartphone to see the person at the door, talk to them, and allow entry (or not).

There are single-button intercoms and multi-tenant intercoms. Both versions have built-in IP cameras. The IP intercom systems can use local intercom servers as well as remote cloud servers to provide the communication path between the intercom and the smartphone. These systems utilize various protocols such as VoIP SIP protocol, audio over IP, IP video, or other protocols to establish the connection between all the devices.

Here’s how the latest IP intercoms work.

Continue reading “How IP Intercoms Communicate with Smartphones”

Technical Jokes and Cartoons-24

Things that Started the Fight:

I took my wife to a restaurant.

The waiter, for some reason, took my order first.

“I’ll have the rump steak, rare, please.”

He said, “Aren’t you worried about the mad cow?”

“Nah, she can order for herself.”

And that’s when the fight started….


My wife sat down next to me as I was flipping channels.

She asked, “What’s on TV?”

I said, “Dust.”

And then the fight started…

One year, I decided to buy my mother-in-law a cemetery plot as a Christmas gift.

The next year, I didn’t buy her a gift.

When she asked me why, I replied,

“Well, you still haven’t used the gift I bought you last year!”

And that’s how the fight started….

Continue reading “Technical Jokes and Cartoons-24”

IP Security Year in Review – 2016

New Security Systems for 2016

By Bob Mesnik

Technology of 2016

2016 will probably be known as the year of the 4K IP cameras.  A number of manufacturers introduced these very high-resolution cameras.

Besides the increased camera resolution, new compression schemes were introduced that reduced bandwidth and storage requirements.  The latest network-attached door readers are now controlled through the cloud.

The readers also include Bluetooth connections that allow your smartphone to be used as the credential.  Video management software was integrated with other devices like door access control and digital cash registers, increasing total security.   Here’s a review of the technology introduced in 2016.

Continue reading “IP Security Year in Review – 2016”

How Fingerprint Readers Work

Fingerprint Reader

What is the Most Reliable Fingerprint Reader?

By Bob Mesnik

Fingerprint readers scan the features of a person’s finger and create a digital code that can be used as a unique digital template.  That’s the concept, but how do fingerprint readers actually work?

There are a number of different technologies used to scan the features of a fingerprint. The engineering challenge is to reliably read the ridges and valleys on the fingerprint so that it can be converted to a digital image.

This article reviews the most popular technologies that use Optical, Ultrasonic and Capacitive sensors.

Fingerprint readers scan the features of a person’s finger and create a digital code that can be used as a unique digital template.  That’s the concept, but how do fingerprint readers actually work?

There are a number of different technologies used to scan the features of a fingerprint. The engineering challenge is to reliably read the ridges and valleys on the fingerprint so that it can be converted to a digital image.   

This article reviews the most popular technologies that use Optical, Ultrasonic and Capacitive sensors.  

Continue reading “How Fingerprint Readers Work”

Technical Jokes and Cartoons – 23

Here are some things to think about:

Dilbert-passwords

There are so many different kinds of apples, that if you ate a new one every day, it would take over 20 years to try them all.

Our brain uses the same amount of power as a 10-watt light bulb.

Sometimes I pretend to be normal, but it gets boring… so I go back to being me.

Continue reading “Technical Jokes and Cartoons – 23”

Reliable IP Paging Systems

PA over IP Illustration

What is the Most Reliable Paging System?

By Bob Mesnik

How important is your paging system?  Is it critical that it continues to work reliably?  Well, if your answer is yes, then paging over IP is a good choice for you.

What does IP Paging do that the older analog paging systems can’t do? It provides increased reliability and redundancy.

What happens if your analog amplifier stops working? Well, your paging system is down and out.  There’s no easy recovery except to replace the amplifier.  With a network attached IP paging system, all the amplifiers are decentralized, and the paging console station can be redundant, providing a much more reliable system. Here’s why IP paging systems are more reliable.

Continue reading “Reliable IP Paging Systems”

Why Can’t I Recognize a Person With My IP Camera?

What Type of Camera Do I Need?

By Bob Mesnik

IP Camera Resolution Required

There was a break-in at your warehouse, but, you were prepared. Last month you installed a complete IP camera system.  Now you have evidence you can share with the police.

Uh oh! You can’t identify their faces. There are two people in the warehouse, but you can’t tell who they are. Ugh!  What did you do wrong?  You have just discovered that having a surveillance camera, is not enough.  You have to have the right resolution camera and the right lens.

This article reviews what you need to assure you meet your security objective.

Continue reading “Why Can’t I Recognize a Person With My IP Camera?”