The Dialogic SingleSpan Series boards are ideal for developers seeking to provide cost-effective, highly scalable, high-density computer telephony (CT) solutions for voice processing applications that require ISDN Primary Rate service termination plus 24 (T-1) or 30 (E-1) voice ports in a single PC slot. A number of different models are available. A unique dual processor architecture comprising of digital signal processors (DSP) and general-purpose microprocessors handles all telephony signaling and performs all DTMF (touchtone) and audio/voice signal-processing tasks.