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Dialogic PowerMedia HMP for Windows
Host Media Processing Software for Voice IP Solutions

Dialogic PowerMedia HMP for Windows

Dialogic Products
Media Server Software
Dialogic PowerMedia HMP for Windows
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Dialogic PowerMedia HMP for Windows (HMP Windows) is scalable, feature-rich media processing software for building innovative and cost-effective voice solutions suitable for enterprise or service provider deployment. HMP Windows can enable basic SIP or hybrid connectivity, audio play/record, transcoding, fax, automated interactive voice response (IVR), and high-end live interactions, such as contact centers and audio conferencing or speech portals. With HMP Windows, Dialogic brings decades of media processing and signaling development experience to a pure software media engine, allowing developers to transition many existing Dialogic hardware-based applications to software-based IP-enabled solutions, or create completely new interactive applications.

HMP Windows extends the capabilities of software-based IP media processing with security features that scale up to 5000 SIP signaling sessions or 2000 concurrent voice user sessions per system. HMP Windows runs on general-purpose servers without the need for specialized hardware. Along with virtualization support, this reduces total cost of ownership and provides greater efficiency and deployment flexibility. Adding Dialogic HMP Interface Boards (DNI Boards) allows PSTN connectivity in a “single box” solution with gateway functionality. Programming interfaces for HMP Windows include Dialogic R4 and Global Call APIs for low-level media and signaling control.


  • IVR and speech-enabled IVR
  • Voice announcement server
  • Voice mail server
  • Unified Messaging (Voice, Fax, Speech)
  • Audio Conferencing Server
  • Prepaid/debit card services
  • Contact center
  • Outbound dialing
  • Speech-enabled applications
  • Transcoding Server (TDM-IP, IP-IP, Voice, Video)
  • IP Media gateways
  • TDM/IP gateways
  • Converged PBX and IP-PBX

How PowerMedia HMP Windows Works

HMP Windows performs media processing tasks on general-purpose processors running on common server architecture without requiring specialized hardware. HMP Windows provides media services and functionality for building flexible, scalable, and cost-effective converged telephony applications, next-generation multimedia servers and gateway solutions for TDM, IP, 3G/4G wireless and IMS networks. HMP Windows is complimented by support for other Dialogic products and technologies, including:

  • Dialogic Global Call and R4 APIs — enables existing applications written for other Dialogic products (for example, board products) to move easily from TDM to IP and to HMP Linux.
  • Dialogic HMP Interface Boards (DNI Boards or Analog boards) — enables PSTN (T1/E1) connectivity in a variety of densities and 4-port Analog boards
  • Dialogic DSI SS7 Boards, Dialogic DSI Signaling Servers, and Dialogic DSI Protocol Stacks
    – provides TDM or IP SS7 interfaces using Global Call API for SS7 Signaling
    – supports single-server solutions, such as for pre-paid wireless and CRBT

Security Features

HMP Windows supports security features to encrypt media and signaling information for media transactions. Secure RTP (SRTP) provides encryption, message authentication, and integrity and replay protection to RTP data so that conversations cannot be stolen for later playback. Transport Layer Security (TLS) is available in SIP to protect signaling data so that dialing or keypad input information cannot be stolen.

Multimedia Features

When deployed in an IP network, HMP Windows supports the initiation and termination of a multimedia (audio/video) call, which includes SIPbased call control and H.263 video format. HMP Windows synchronizes voice and video streams for playback on IP video phones and videoenabled soft clients, and it can also deliver only the audio portion of a video call to an audio-only endpoint.

Easy Migration to Hybrid TDM-IP and Pure IP Solutions

HMP Windows uses the Ethernet Network Interface Card (NIC) typically present in host server platforms to enable IP connectivity, and supports the IETF RFC 3261 SIP standard for voice and video call session establishment.

When combined with Dialogic HMP Interface Boards (DNI Boards) for PSTN connectivity, HMP Windows provides a cost-effective platform for building TDM solutions, and then later migrating them easily to hybrid platforms, and ultimately to pure IP deployments. The DNI Boards are software-selectable T1 and E1 trunks supporting a range of PSTN protocols, including ISDN and CAS. Hybrid platforms can be deployed as IP media gateways, enhanced service platforms, or converged PBX solutions.

To help customers accelerate their time-to-market and migrate existing applications to IP, HMP Windows supports two direct APIs: the Dialogic R4 API for media processing and the Dialogic® Global Call API for call control. Because these APIs are consistent with the APIs for Dialogic boards with DM3 architecture, Dialogic customers can facilitate quick application development and easy migration from a board-based platform to a platform based on HMP Windows.


To provide interoperability for high-quality media streaming with a wide variety of IP gateways and endpoints that comply with IETF and ITU standards, HMP Windows supports RTP/RTCP protocols for streaming over IP using G.711, G.726, G.723.1, G.729, GSM-FR, GSM-EFR, AMR-NB, AMR-WB (G.722.2) and G.722.

To further provide high voice quality and low latency, HMP Windows supports:

  • Threshold alarms
  • Packet loss reduction/concealment
  • RTP and RTCP timeouts
  • Type Of Service (TOS) byte setting
  • Detection and reporting of timeouts in RTP and RTCP sessions to applications


Audio Conferencing features in HMP Windows facilitate the development of advanced conferencing applications. These features include:

  • Coaching and Whisper Conferencing
  • Active talker notification
  • Tone clamping
  • Echo cancellation

Other Notable Features

HMP Windows also includes the following notable features:

  • Support for HD Voice Messaging using wideband audio codecs G.722 and AMR-WB (G.722.2)
  • Ability to use Dialogic’s IP call control API or, at developers’ preference, to integrate another IP call control protocol stack
  • Ability to programmatically control the volume of RTP sessions in order to benefit the end-user experience
  • Support for a variety of media processing functions, such as:
    – Play with volume control
    – Record with Automatic Gain Control (AGC)
    – Dual-Tone Multi-Frequency (DTMF)
    – User-defined tone detection and generation, including industry-standard RFC 2833/RFC 4733 mechanisms
  • Support for outbound call progress analysis with positive voice detection and positive answering machine detection algorithms
  • Support for Dialogic Continuous Speech Processing (CSP) functionality with APIs that are compatible with Dialogic boards, allowing integration with Automatic Speech Recognition (ASR) engines
  • Support for fax store and forward for IP (T.38 and G.711 fax pass-through) and PSTN (V.17) networks.


Dialogic Products
Media Server Software
Dialogic PowerMedia HMP for Windows
Get a Quote!