A system, method and computer-readable medium for allowing the use of an alternative numbering plan for delivering short messages to mobile subscribers using the public mobile telephone network is provided. Users of an enterprise or other closed networks as well as users that are not part of a closed network may send short messages destined to members of an enterprise or closed network from their mobile or other devices associated with their subscription using an alternative enterprise directory number, such as the office number, instead of the mobile number, such that the alternative number will be presented at the destination device as the originating number. The recipient may respond to the message by addressing the response to the enterprise or closed network number, and the response may be delivered to the originator's mobile or other device associated with their subscription.

Systems, methods, and computer program products are for mapping an extensible markup language (XML) encoding declarations to a short message peer-to-peer (SMPP) data coding scheme (DCS) for a mobile-terminated (MT) short messaging service (SMS). An exemplary method includes receiving a message from a short message entity (SME) for delivery to a mobile device. The message includes a payload with at least one character encoded in accordance with a first character encoding scheme. The exemplary method further includes receiving from the SME a second encoding scheme for the message, implementing a mapping table to map the first character encoding scheme to the second character encoding scheme, and performing an encoding transformation of the message from the first character encoding to the second character encoding scheme yielding a modified message comprising the payload of the message encoded in the second character encoding scheme as specified by the SME.

In some examples, a user equipment (UE) detects a change in a radio access technology, and in response to the change in the radio access technology, receives information sent by a wireless network. The UE compares the received information to a policy to determine whether a feature is supported by the wireless network, and based on the comparing, sends an indication informing the wireless network which network type of plural different network types to use for sending a Session Initiation Protocol (SIP) message.

In some examples, a user equipment (UE) detects a change in a radio access technology, and in response to the change in the radio access technology, receives information sent by a wireless network. The UE compares the received information to a policy to determine whether a feature is supported by the wireless network, and based on the comparing, sends an indication informing the wireless network which network type of plural different network types to use for sending a Session Initiation Protocol (SIP) message.