How many telephone sets can a Ring Generator drive?
PowerDsine Ring Generators are defined for both maximum wattage and maximum REN. To find these maximum ratings, please refer to the product’s specifications. Short form specifications are also available in the PowerDsine Ring Generators Selection Guide. A Ring Generators’ ability to ring multiple telephone sets is a function of the amount of power that can be continuously dissipated inside the Ring Generator without causing damage to it. This is effected by many parameters, including the Ring Generator’s efficiency, ambient temperature, the loads’ power factor and the operating duration. When our specifications define maximum REN, unless otherwise specified, we refer to a standard North American REN. A standard 1 North American REN represents the ringer loading effect of 6930W in series to an 8mF capacitor. A 5 North American REN represents the ringer loading effect of 1926Ohm in series to a 40mF capacitor. A SONY SPP-X90 cordless telephone, for example is rated 0.3B REN. This means th
