1)   SMSC Relay VCL SDK 2.3
SMSC Relay VCL SDK library is a VCL library for SMS/EMS communication with the SMSC through TCP/IP. Protocols SEMA, CIMD2, UCP and SMPP. Send and receive SMS, EMS, logos, ring-tones, 7-bit text, 8-bit binary data and Unicode (UCS2) messages.

 2)   SMSC Relay ActiveX SDK 2.3
SMSC Relay ActiveX SDK library is a ActiveX library for SMS/EMS communication with the SMSC through TCP/IP. Protocols SEMA, CIMD2, UCP and SMPP. Send and receive SMS, EMS, logos, ring-tones, 7-bit text, 8-bit binary data and Unicode (UCS2) messages.