111/113MSISDN Mobile Station ISDN NumberNMP Nokia Mobile PhonesPC Personal ComputerPCM Pulse Code ModulationPCMCIA PC Memory Card International AssociationPDU Protocol Data UnitPIN Personal Identity NumberPUK Personal Unblocking KeyRI Ring IndicatorRLP Radio Link ProtocolRLSD Received Line Signal DetectorRTS Request To SendSIM Subscriber Identity ModuleSM Short MessageSMS Short Message ServiceSMSC Short Message Service CentreTA Terminal Adapter, the physical equipment where AT command interpreterresides (May be combined with ME)TCH Traffic ChannelTE Terminal Equipment, the physical equipment from where applicationscommunicate with a TA using AT commandsTIA Telecommunications Industry AssociationUART Universal Asynchronous Receiver TransmitterUI User InterfaceUSRT Universal Synchronous Receiver TransmitterUSSD Unstructured Supplementary Service DataWLAN Wireless Local Area Network23. DEVELOPER SUPPORTIf you have any questions regarding this Developer Manual, please submit your queries atwww.forum.nokia.com (Click Feedback, then Developer feedback).