SMSC Relay ActiveX SDK 

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.
smsc smpp ucp sema cimd2 sms ems smsc relay activex mobile messaging sms gateway sms server mobile value-added services

SMSC Relay VCL SDK 

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.
smsc smpp ucp sema cimd2 sms ems smsc relay vcl mobile messaging sms gateway sms server mobile value-added services