An SMS gateway allows a computer to send or receive Short Message Service (SMS) transmissions to or from a telecommunications network. Most messages are eventually routed into the mobile phone networks. Many SMS gateways support media conversion from email and other formats.
About short code
Short codes (also known as short numbers) are special telephone numbers, significantly shorter than full telephone numbers, that can be used to address MMS and SMS messages from certain service providers' mobile phones or fixed phones. There are two types of short codes: dialing and messaging
About bulk sms reseller
A reseller buys SMS credits in bulk and sells them in smaller batches to their customers. Bulk SMS Reselling has designed the Reseller Solution to provide clients with an opportunity to resell SMS credits to their customers for individual and business purposes.