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For more than 10 years, Forest Rock has been supporting industries to embrace the Internet of Things to the benefit of organisations, people and the environment. As well as consulting, designing, developing and implementing IoT projects UK and worldwide we also support engineers with the IoT equipment they require to improve the organisation's infrastructure.

Below you’ll find information on our Wireless Gateways, which include various models from ALTA. For example: ALTA 3G Cellular Gateway, ALTA Ethernet Gateway 4, ALTA Serial Modbus Gateway and ALTA Serial Modbus USB Programmer.

What is the difference between a Modem, Router and a Gateway?

A modem sends traffic from point A to point B without further manipulation. It’s not going to provide much data protection and it probably won’t have a firewall.

Whereas, a router is an intelligent device which contains a cellular modem, some of the highest grade routers can even support multiple cellular carriers. This means that if you’re running traffic on one carrier network, and for some reason that connection goes down these routers are able to offer a failover to a secondary cellular connection. A quality router will provide a robust firewall so that it can handle packet level traffic inspection which reconciles incoming traffic without outgoing requests. It should also support numerous types of tunnel options for data security.


IPSec is a very popular tunnel for encrypted traffic, but other options include GRE, L2TP, PPTP and Open VPN. Many industrial grade cellular routers will actually contain an input/output or I/O option. This enables users to handle tasks like field device control and operations management. Let's say you’re monitoring the temperature of a particular asset that has been deployed in the field perhaps its a pump and the temperature goes too high using the onboard I/O it’s possible to issue a shutdown to avoid damage to the pump.

Many routers contain onboard programming languages and execution models therefore if you wish to avoid deploying additional hardware in the field, this is another element to consider.

Finally, the last device type is the cellular gateway. Gateways don’t possess the degree of networking traffic control that routers do but they usually offer simplified configuration. Gateways often tend to have some kind of onboarding programming model as well as some offering IO options. The important thing about gateway, that by definition, they provide protol translation, so it might be Zigbee, Wired HART or Modbus connecting to cellular or other technologies.

There are numerous options where cellular gateways are concerned.

Here at Forest Rock Systems we stock and distribute a superb choice of 4G LTE Gateways, specifically 4G LTE Gateway / 4G Gateway Router.

Our 4G LTE Wireless Gateways include:

  • Teltonika TRB140 Single SIM 4G IoT Gateway (Ethernet)
  • Teltonika TRB141 Single SIM 4G IoT Gateway (GPIO)
  • Teltonika TRB142 Single SIM 4G IoT Gateway (RS-232 Serial)
  • Teltonika TRB145 Single SIM 4G IoT Gateway (RS-485 Serial)

Forest Rock is a UK based distributor of Teltonika 4G Gateway products. Get in touch with a member of our helpful sales team today for more information on any product.