RoIP Usage Examples

The following are some examples of current uses of RoIP engineered solutions. There are many other possible uses, and if you have any questions about these examples, or wish more information, please contact one of our sales associates. They can easily be reached on email at

Example 1 - Wide Area Voice Paging System

Example 2 - Point-to-Point Link, Passing Voice and ANI Data

Example 3 - 911 Dispatch Solution for the Town of Canmore (Alberta, Canada)

Wide Area Voice Paging System

Remote area school districts are spread across several hundred square miles, and often have many challenges communicating effectively. British Columbia's School District 91 (Nechako Lakes) was no exception, covering several small towns and villages  spread over 40 000 square kilometers. (see map insert)

The school maintenance staff for the district carry voice pagers to ensure that they can be quickly dispatched when needed. However due to the lack of decent paging coverage, the district installed their own paging terminals in the major towns in the district. These were not linked, and there were 6 separate numbers for the 6 terminals. Therefore, when paging any person, you were never totally sure what town the person may be in, and thus never knew if your page made it, unless you paged them in every town.

RoIP technologies engineered a solution whereby the main center, in Vanderhoof, contained the main paging terminal, and all other terminals were connected via the Internet, so that the voice pages would be simulcast in all towns. This solved the problem, and lowered the operating cost of the system, as 5 phone lines and 5 paging terminals were no longer required. This also lead to easy and affordable expansion of the system into smaller towns where the existing budgets would not support new paging terminals or line costs. Additionally, the system was designed as a store and forward system, allowing links at lower speeds (dialup speeds) to participate in the paging network.

The paging system currently covers the following towns:
Vanderhoof (home of the main server)
Fort St James
Fraser Lake
Burns Lake
Grassy Plains

Quotes from Terry Paton - Telecommunications Specialist @ School District 91 (Nechako Lakes):

"The entire system is based on the Linux operating system and I can attest to the wonderful fact that I only have had to reboot the main server once in the past two years. Lets see other operating systems boast that!"

"Working with Dave Cameron & RoIP Technologies has proved to be a good investment for the future."

Point-to-Point Link, Passing Voice and ANI Data

British Columbia is a very mountainous region of Canada, with many mill based towns. These mills are separated by several hundred miles of roads and ferries.

The major industries in British Columbia are forestry and paper production. Pulp mills require a constant supply of wood chips to maintain production. Many times the sawmill and pulp mill are not located at the same site, so several transport companies supply these chips from the sawmills to the pulp mills. One such transport company started using radar-based level detection systems to transmit the amount of chips in the pulp mill chip bin back to the central dispatch center. This would allow the dispatch center to dispatch their chip trucks to the mills most in need of chips to maintain the level in the bins, and thus maintain production.

Much of the communications were done through high-altitude terrestrial linking on UHF, which allowed the dispatchers to send voice audio and DTMF signals to trigger the level detection devices to report the level of chips in the bin. The dispatchers would also use these systems to communicate via voice to the truck drivers themselves. With the rugged terrain, some of these UHF links were not possible, and these remote areas had to be serviced with leased lines from the telephone company. As the cost of these lines increased, the company decided to look for other options.

RoIP Technologies engineered a solution where the remote town would be served by an internet based link, which essentially placed a VHF radio in the remote town, that was an exact copy of the leased line. The solution allowed the dispatcher to perform the same tasks, without changing the operations at the dispatch center. The integration was so seamless, many dispatchers were unaware of the change.

This single connection saved the company thousands of dollars per month. Plans are in the works to replace all of their leased phone lines with internet based links.

Quote from Wilfried Mulder - Communications Expert @ VMR Communications (Vernon):

"The internet based voice over IP solution that David Cameron developed allowed our customer to add to their existing communication infrastructure in a economical and efficient manner. This solution was installed in December of 1999 and was the first VOIP system in commercial radio dispatch use offering full reliable service, RoIP Technologies was a leader setting the trend for future VOIP applications and developments"

911 Dispatch Solution for the Town of Canmore (Alberta, Canada)

Early in 2001, the Town of Canmore, Alberta began searching for a solution to provide full 911 dispatching services to its Emergency Services department.  The geographical location of Canmore, with its mountainous terrain, posed some initial limitations to linking its existing Radio System to other centers offering communities full 911 dispatch services. 

Brent Pedersen, the Town of Canmore’s Emergency Services Manager, researched possible linking solutions and found them to be cost prohibitive as well as inefficient for his needs. Randy Zaleschuk, the Town of Canmore’s Information Systems Manager, also an avid Amateur (HAM) Radio Operator, had just setup a link in Canmore using a new and innovative technology developed in Amateur Radio called the Internet Radio Linking Project (IRLP).

While Randy Zaleschuk was demonstrating his link to Brent Pedersen, Brent asked if the technology could be modified and used in a commercial radio system to link other centers.  This question began a project to secure a reliable means of linking Canmore’s radio system through the Internet for the purpose of providing 911 dispatch services.

Working with David Cameron, founder and designer of the IRLP system and RoIP Technologies, a link was established between Canmore and Okotoks, Alberta with the idea of using the Foothills 911 Center in Black Diamond, Alberta for the Dispatching Services.

In August 2001, the following configuration (Phase 1) was established:


After some changes to the software, RoIP Technologies was successful in permitting 2-tone voice paging to occur through the link. Programming changes were also made to the Zetron dispatch console at the Foothills 911 Center to allow links to be established and terminated as well as paging to be activated directly from the console.

September saw daily testing of the new link and its paging capability, as well as some operational traffic being handled by the Foothills 911 Center.

October 1st saw the system in full operation with all 911 calls for Fire and Ambulance being dispatched by the Foothills 911 Center.

Based on the huge success of the initial Phase of this project, Phase 2 was installed in 2002, which established the following configuration:

In this configuration, the system permits communications between Paramedics in the field and the dispatch center throughout their entire area of operation.  The final result is a seamless Push-To-Talk communication system.

During Phase 2, the system was also switched from an RoIP PC solution to the RoIP Embedded solution, as a PC failure in the system could cause major downtime, and create a life threatening situation. Since installation of the embedded hardware, there have been no hardware failures.