A cellular network facility that allows users to send and receive text messages of up to 160 alphanumeric characters on their handset.
						                            Source(s):
						                            
								                            
                                                                    NIST SP 800-101 Rev. 1
										                            
									                            
						                            
						                            
						                        
					                            
						                              a mobile phone network facility that allows users to send and receive alphanumeric text messages of up to 160 characters on their cell phone or other handheld device
						                            Source(s):
						                            
								                            
                                                                    NISTIR 7250
										                             under Short Message Service 
									                            
                                                                    NISTIR 7387
										                             under Short Message Service