Answer:
Option
Explanation:
SMS gateways allow computers to send and receive SMS messages with the help of telecommunications network.
Gateway software providers, known as aggregators make agreements with different mobile networks for the transmission of their clients' SMS messages. When a cell phone receives an SMS, it then sends back a report to the provider to document any errors.
Some programs, such as AOL Instant Messenger, ICQ, Windows Live Messenger and Skype, include SMS capabilities. Microsoft Outlook and some other email programs do not need an aggregator as they equipped with their own SMS Gateway.
