Customer SMPP accounts are associated with a service, and it is the routing profile for the service that defines the routing of customer messages. Messages are either routed based on Scripts or SMSCs defined in SMSC groups.

A service’s routing profile contains one or more groupings of SMSCs (an SMSC group). These SMSC groups are normally used to group together one or more SMSC accounts from an individual supplier and belong to a specific service from that supplier.

Relationship between service, routing profile, SMSC group and SMSCs.

A number of different routing methods are being added to the SMPP SMS Gateway. The following routing strategies are currently available. The strategy for a routing profile can be selected in the Routing section.

Used in routing decision	RR	Net-RR
	Uses all SMSCs in all SMSC groups that are part of routing profile. Uses SMSCs in a round-robin distribution.	Same as for RR, but only uses SMSCs that can reach destination network.
Network coverage (Suppliers > Routes)	No	Yes
Cost for sending message to network via SMSC (Suppliers > Routes)	No	No

SMSC Selection when using RR and Net-RR routing strategies