Z.Voice VoIP Gateway Reference Design

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Brochure: dtzv4s1d_br.pdf (484 KB)




Key Features

  • 4 RJ-11 Voice Ports
  • Integrated managed 5-port Ethernet Switch
  • 403LP ZSP Voice Processor with Z.Voice
  • Complete Software Solution
  • Customization Support



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Voice-Over-IP (VoIP) is the value application for the emerging broadband infrastructure fueled by DSL, cable, and Wi-Fi deployment.  VoIP's value proposition of lowered long distance voice communication, integration with web applications for customer service and low cost enablement of voice channels in emerging countries is leading to explosive growth in VoIP subscribers.  This type of phenomenal growth requires take to market reference designs, like the DTZV4S1D,  that are cost effective and time efficient for ODM's to quickly deploy in the marketplace.

Product Description

The DTZV4S1D is a 2-board solution featuring the Micrel's KS8695PX VoIP Eval board and the DTVOIP4S1D daughterboard.   Z.Voice Gateway Reference Design was developed through collaboration between ZSP, Micrel, and Encore Software.  Micrel's KS8695PX, with its integrated 5-port Ethernet switch SoC, runs the SIP signaling and router software from Encore. 

The DTVOIP4S1D daughterboard featuring the 403LC-120 ZSP voice processor runs the Z.Voice codec and telephony software bundle from ZSP to support 4 ports of voice.  One DAA interface is also provided on the daughterboard.

The Host side software consists of:

  • Example Linux ZSP driver with Z.Voice software license
  • RTP/JB Source available for licensing
  • SIP available for licensing from Encore Software

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The Z.Voice Package consists of:

  • G.711, G.729AB, G.723.1, G.726 Codecs
  • G.168 Line Echo Canceller
  • DTMF Detection/Generation
  • Call Progress Tone Generation
  • Call Progress Tone Detection (FXO only)
  • Caller ID Generation
  • Caller ID Detection (FXO only)
  • Voice Activity Detection (VAD)
  • Comfort Noise Generation (CNG)
  • Packet Loss Concealment (PLC)
  • T.38 Fax Relay




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