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4 Types of ATM Communications

Updated: Feb 28, 2021

ATM (asynchronous transfer mode) communications are the methods used to connect an ATM to the host. As you compare the various ATM communication options, know what to expect from each type so that you can determine which one is right for you. This beginner’s guide will help you get started with the basics of each.

4 Different ATM Communication Options

1. Dial-Up

This type is ideal for lower-volume ATMs. Its modem connects to the host computer by dialing the host’s phone number and making a connection. It‘s very affordable, both in initial cost and monthly operating costs.


TCP/IP stands for Transmission Control Protocol/Internet Protocol. This is web-based, integrating the ATM into the existing Ethernet and IP networks. If you have already paid to set up these networks, then this method is extremely affordable. Each ATM cell is 53 bytes in length, with five bytes of header information and 48 bytes of data. Each cell is processed one at a time.

3. Wireless

A wireless network, often called WATM, offers high-speed mobile communication. The cells broadcast from the base station to mobile terminals, where the switch performs the mobility functions. This method supports data, voice, and video with guaranteed quality of service (QoS).

4. Leased Line

Protocols such as SNA/SDLC utilize integration into your existing network. The machine connects directly to the host processor with a point-to-point dedicated phone line. Though this is one of the pricier communication options, it is recommended for high-volume ATMs. They can be combined with emulation protocols and be easily installed.

Ensure your customers have access to cash with an ATM from Heath ATM. Email or call us at (800) 849-3029 for a custom quote. Or take advantage of our free ATM placement program.


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