A standard cooling fan is essentially a bladed DC motor. By varying the voltage input across the acceptable range for a fan, the speed of the fan will increase (to added voltage) and decrease (to reduced voltage); a faster fan means more air moved and thus a higher heat exchange rate.
Contact them toll-free from a Vodacom cellphone by dialing 111. Contact them toll-free from a Telkom phone by dialing 0800-111-234. Note: Telkom toll-free numbers are generally NOT toll-free when dialed from a MTN/Vodacom cellphone.
Below are listings for Mediacom 1-800 phone numbers. Mediacom Customer Service: 1-855-633-4226 (1-855-MEDIACOM) Thank you for calling Mediacom. If you are not a Mediacom customer, please press star otherwise enter the phone number associated with the account you are calling about, beginning with the area code. Briefly tell me what you are calling about today, for example I want to order new services.