Public transit is an inseparable part of any national infrastructure, and its contribution to personal and national economic, and social growth is priceless. More than 3,000 buses on average are circulating on the trunk line system. To coordinate this system, an outdated PTT system utilising cellular phones was used. There were significant infrastructure challenges and high operational costs which caused the company major problems. The customer realized this was an opportunity to completely rethink its Push-to-Talk (PTT) communication capabilities to deliver the high level of service customers expect.