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Radio Over Internet Protocol Dispatching Service

Chappelle Enterprises is happy to announce the opening of their Radio Over Internet (ROIP) Dispatching Center.  We can provide you with your dispatching needs, whether is a security patrol business, courier, trucking, Taxi companies, School Buses or any business that needs to stay in touch.

What is Radio Over IP?

Radio over Internet Protocol (RoIP) is a methodology of transmitting and receiving radio communications via Internet Protocol (IP), a data communications standard used to power the Internet as well as home, business and government computer networks.

If you understand the concept of Voice over IP (VoIP), Radio-over-IP is basically the same thing with an added command layer to control basic radio functions such as push-to-talk (PTT), frequency change, etc.

What Can RoIP Do For Me?

In its most basic form, RoIP technology provides a method of linking two or more radios or repeaters using a LAN/WAN or Internet connection. This is known as Site Linking or Point-to-Point linking.

Another common application is IP Dispatch or remote base station. Like tone remote, this allows users the ability to operate transceivers remotely, but distance is not limited by cable length. Dispatchers use a software-based IP Console which typically runs on the Windows™ operating system, or in some cases Linux.

Radio-over-IP has become a major enabler of interoperability, allowing otherwise incompatible radio systems to communicate seamlessly, sharing a common data connection.

Push-to-talk for mobile phones and PDAs, known as P2T may be used in conjunction with RoIP networks. This allows SmartPhone users to communicate directly with radio users and dispatchers. Now a cell phone can double as a two-way radio.

Site Linking

The first and most basic use of RoIP is using the Internet or LAN/WAN to link two radio sites together. Providing both sites already have Internet, this is a very cost-effective solution. Traditionally, linking sites required a leased telephone line or installation of an RF link with radios, antennas, hardline, and additional tower space. If the locations are not line-of-sight from each other, it might require 2 or more hops to make the link. RoIP has no distance limitation, so long as both sides are on the same network or Internet.

IP Dispatch

Using a “soft console” or other RoIP software, users can operate radios remotely – from anywhere that has Internet or network connection. Soft console apps are available for a wide variety of devices including desktop computers, laptops, tablets and PDAs. Deployments range from a single user controlling a single radio, to full E-911 dispatch centers with multiple operators controlling dozens of radios at several locations.


One of the most exciting applications of RoIP technology is its ability to quickly and easily bridge the gap between otherwise incompatible radio systems. Each radio is connected to a universal radio interface via the microphone jack or auxiliary connector. At a minimum, all that’s needed is RX audio, TX audio and PTT control. Some more advanced systems offer additional radio controls, such as frequency change, monitor, ANI, etc.


New P2T apps for smart-phones can eliminate the need to carry a radio as well as a cell phone. An added advantage is the virtually unlimited range offered by cell phones. An LMR radio can access only the local or regional radio network it is programmed and authorized for. A cell phone however, is able to utilize national and even international networks covering more than 95% of the population. For example, a P2T user can carry on a 2-way conversation with radio users from the next county or from across the country.

Is RoIP Secure?

Like any IP system, RoIP systems support high levels of security using a variety of techniques that can include identity management for both user and device  authentication (if the device is IP-based), access and use security based on assigned permissions, encryption, and the ability to monitor, audit and record activity. They cannot, however, change the security of any transmission that is not IP-based, i.e. the initial over the air communication.

Who’s Using It Today?

RoIP technology is well known in the US military, increasingly in business, and is now being considered by emergency agencies across the United States.

What Types of Devices Can Utilize RoIP Technology?

End users can use any communications device they wish including legacy and new radios, analog and digital UHF and VHF radios, analog and digital PBX phones, cell phones, software phones, IP phones, PDAs, and computers. This flexibility allows agencies and individuals that do not use public safety radios to be tied into the emergency communications stream when necessary, whether it is the Mayor, hospitals, public health, the National Guard or an expert that is needed during an emergency event.

Coming Soon

Contact us to find out more about our private investigation and surveillance services.