Short description of SMSC Relay VCL SDK 2.3: SMSC Relay VCL SDK library is a set of optimized VCL components for quick creation of applications implementing the SMS/EMS communication with the SMSC through TCP/IP. Features: SMSC access protocols SMPP, UCP, SEMA and CIMD2; Receiving messages sent to short GSM numbers; Send and receive of SMS, EMS, logos, ring-tones etc.; Send and receive 7-bit text, 8-bit binary data and Unicode (UCS2); Connection keep-alive functionality and more.