SHD Series Digital Trunk Voice Board, SHT Series Analog Voice Board, Digital Trunk Monitoring Board, FAX Decoding Board, Digital Telephony Record Board and Accessories of voice boards. With which have the applications such as Telemarketing, Interactive Teleconferencing , Tele Value-Added Service,( like Background Music Service), Fax Server, Voice Mailbox, Signaling Gateway ,Call Center, Intelligent Network, IVR, etc.