This type of system can be the most demanding of all in terms of inter-site communications. To achieve the critical levels of performance and accuracy required by these mobile radio systems, designers and operators have begun looking to digital transmission solutions, particularly T1 and E1 digital multiplexing. Digital channel banks and multiplexers offer the ability to combine multiple voice and data channels into a single high-speed digital transmission between sites. For example, in traditional radio systems, the transmission path timing has a tendency to slip over time, causing delays in data channels and phase shifts in voice channels. To correct this situation, radio manufacturers often add functions such as phase amplitude compensation and induced delay to the radio system.
Intraplex products provide an inherently stable transmission link.
Keeping the use of compensating circuits to a minimum produces a more reliable radio system. The remainder of this application note summarizes the features of Intraplex multiplexers that mobile radio system designers and operators have found most useful. Low, controlled time delay through the multiplexing equipment 4. Provision of subrate data multiplexing modules 5. Provision of redundant power supplies 7.