22.1423GPPRelease 17TSValue Added Services (VAS) for Short Message Service (SMS) requirements
For the purposes of the present document, the terms and definitions given in  and the following apply:
Short Message Forwarding: The service permits the network to send all incoming short messages addressed to the called mobile subscriber’s directory number to another directory number.
Short Message Filtering: The service permits the network to filter certain short messages on behalf of a called/calling party based on the called/calling party’s preferences.
Short Message Receipt: The service permits the network to send one or more receipts to inform a calling party the status of sent message.
Short Message Network Storage: The service permits the network to help the subscriber store messages that the subscriber has sent or received.
SMS VPN service: Enables the exchange of SMS messages between VPN (Virtual Private Network) members by using a short number, usually similar to the receiver fixed extension number, instead of using the full mobile number of the recipient.
SMS Auto Reply: The SMS Auto Reply service enables the subscriber to activate an automatic SMS reply in response to incoming SMS messages, both from in network subscribers as well as from foreign networks subscribers (incoming MT messages from foreign networks).
SMS Personal Signature: The service allows the end user to personalize its outgoing messages either with a personal remark or a business title. The service enables a user to pre-define a text that will automatically be added to all outgoing SMS messages.
SMS Deferred Delivery: The SMS deferred delivery service provides a subscriber the capability to control the actual delivery time of messages created by him. User using this capability can send a message and configure it to be delivered at a later time.
For the purposes of the present document, the following abbreviations apply in addition to :
SMS-SC Short Message Service – Service Centre
SM Short Message
VAS-SMS Value-added Services for SMS