Alphanumeric Sender ID
The alphanumeric sender ID allows the sender to send messages using a custom, recognisable sender ID constructed from any combination of numeric and alpha characters (0-9, a-z, A-Z, _). An alphanumeric sender ID is much more recognisable by users so they can identify the sender more easily. This way, the sender ID can be used to present anything from a company name to a name of a government organisation. However, the receiver of the message can't reply to a message sent with an alphanumeric sender ID.
See Melrose Labs Tyr SMS Gateway
Melrose Labs: Our mission is to deliver pivotal services in cloud communications across mobile, fixed-line and internet for enterprises of all sizes. Through these services, we help businesses and other organisations communicate better with their staff and customers, and by doing so increase their success.