Mobile Originated (MO)
Mobile Originated (MO) messaging refers to a voice call or SMS message that originates from a mobile phone. More precisely in the case of SMS, this is an SMS text message that the customer/subscriber sends from their mobile device to another mobile user or application. The term also describes the communications leg between the customer/subscriber and the SMSC.
See Melrose Labs Tyr SMS Gateway
Melrose Labs: We deliver innovative services in cloud communications across mobile, fixed-line, satellite and internet. Through these services, we enable businesses to communicate better with their staff and customers, and by doing so, increase their success.