eurovoice HMP 1.1

eurovoice HMP 1.1 overview

eurovoice HMP provides a high performance, low-level SDK for developing SIP-based VoIP applications. Typical applications include inbound and outbound Interactive Voice Response, Call Routing & Transcoding. The SDK may also be used in a SIP-only mode for the development of SIP Application Servers.

eurovoice HMP 1.1 SDK provides the following functionality:-

SIP

· Make / receive calls

· Reject or redirect calls

· Mid call transfer (SIP REFER)

· Send / receive custom SIP Headers

· Send / receive custom SDP data

· SIP Registration, as a client or server

· SIP WWW or Proxy authentication, as a client or server

· SIP INFO, NOTIFY and OPTIONS messages

· On / off hold support.

· IPv4, IPv6, SIP, SIP over TLS.

RTP

· RTP Session management

· G711 u-law and A-law codecs

· Support of u-law, A-law and 16-bit linear audio file formats

· Play audio file

· Record audio

· Send / Receive DTMF over RFC2833

· Timer start / stop

· Active Speech Detection with 100ms resolution

· RTP Stream switching for tromboning and audio broadcasting support

· RTP or SRTP.

Scalability

· In excess of 250 simultaneous SIP / RTP sessions

· For SIP-only mode, in excess of 1000 concurrent SIP sessions.

eurovoice HMP 1.1 is designed for Microsoft Windows 64-bit platforms including:-

· Windows Server 2008R2

· Windows Server 2012, 2012R2

· Windows Server 2016

· Windows 7, 8, 8.1 and 10.

eurovoice HMP 1.1 technical specification

The eurovoice Host Media Processing SDK provides a set of functions that may be called by the user application to receive and make SIP calls, start and stop audio (RTP) sessions, play and record audio files, send and receive DTMF tones and more.

The SDK provides an asynchronous architecture – this allows an application to support multiple simultaneous phone calls with one thread of execution. When an HMP function is called from the user application it returns immediately. The eurovoice HMP layer then performs the necessary low level functions and raises a completion event when done. Additionally, the eurovoice HMP layer raises an event to the user application when an external telephony event, such as an incoming call, occurs.

eurovoice HMP architecture

The SDK includes a C or C++ compatible library which can be called by applications developed in Microsoft’s Visual Studio Integrated Development Environment or by other compatible compilers. Visual Studio 2012 or later is recommended.

Developers wishing to use a higher level development environment, such as C# or VB.NET, or who do not want to develop low-level asynchronous event callback type applications are recommended to use eurovoice’s high-level application development toolkit, eurovoice objects 5.0.

The functions exposed by the eurovoice HMP SDK include:-

General functions

evHMP_EventText	Returns a text string representing an event
evHMP_GenTimerStart	Starts or restarts a general timer
evHMP_GenTimerStop	Stops a general timer
evHMP_GetNumLinesLicenced	Returns the number of eurovoice HMP lines licenced on server
evHMP_GetVersion	Returns eurovoice HMP version information
evHMP_Log	Writes a user specified entry to the HMP log file
evHMP_ResultText	Returns a text string representing a return code value
evHMP_SetCallback	Stores a reference to the call back handling function

SIP functions

evSIP_AnswerCall	Accepts an incoming call request
evSIP_AnswerCallDataInit	A convenience function to initialise AnswerCallData
evSIP_AuthChallenge	Sends an authentication challenge to the incoming request
evSIP_AuthChallengeDataInit	A convenience function to initialise AuthChallengeData
evSIP_AuthDataInit	A convenience function to initialise AuthData
evSIP_AuthValidateResponse	Validates an authentication response
evSIP_CancelCall	Cancels an outgoing call attempt
evSIP_GetAuthData	Retrieves incoming authentication information
evSIP_GetRTPData	Retrieves SDP information from incoming call
evSIP_GetSIPHeader	Retrieves SIP headers from incoming call
evSIP_GetSourceAddress	Returns source address and port of incoming request
evSIP_MakeCall	Initiates an outgoing call
evSIP_MakeCallDataInit	A convenience function to initialise MakeCallData
evSIP_OffHold	Takes a call off hold
evSIP_OnHold	Puts a call on hold
evSIP_Register	Sends a SIP registration request to a SIP Server
evSIP_RejectCall	Rejects an incoming call request
evSIP_SendBye	Ends a call
evSIP_SendInfo	Sends a SIP Info message
evSIP_SendNotify	Sends a SIP Notify message
evSIP_SendOptions	Sends a SIP Options message
evSIP_SendProvisional	Sends a SIP Provisional message to an incoming call
evSIP_SendRefer	Sends a SIP Refer message for mid-call transfer
evSIP_SendRegResponse	Returns a response to an incoming SIP REGISTER request
evSIP_SendReInvite	Sends a further SIP Invite request during a call
evSIP_SendReInviteResponse	Returns a response to a SIP Re-Invite request
evSIP_Start	Starts eurovoice HMP, logging and the SIP stack
evSIP_Stop	Stops the SIP stack, logging and eurovoice HMP
evSIP_UnRegister	Deregisters the SIP stack from a SIP Server

RTP functions

evRTP_Play	Starts the sending of audio buffer data over RTP
evRTP_PlayAddBuffer	Adds data to the audio output buffer
evRTP_PlayClearBuffer	Clears existing data from the audio output buffer
evRTP_PlayStop	Stops the sending of audio data over RTP
evRTP_Record	Starts the receiving of incoming audio data
evRTP_RecordGetBuffer	Retrieves a buffer of incoming audio data
evRTP_RecordStop	Stops the receiving of incoming audio data
evRTP_SendDTMF	Sends DTMF digit(s) over RTP using RFC2833
evRTP_SendDTMFStop	Stops the sending of a DTMF digit string
evRTP_SessionCreate	Creates a new RTP session
evRTP_SessionGetChannelFromHandle	Retrieves the application’s channel from RTP handle
evRTP_SessionGetHandleFromChannel	Retrieves the RTP handle from channel number
evRTP_SessionRemove	Ends an RTP session
evRTP_SpeechDetectionStart	Starts active speech detection on incoming audio
evRTP_SpeechDetectionStop	Stops active speech detection on incoming audio
evRTP_Start	Starts the RTP engine
evRTP_Stop	Stops the RTP engine
evRTP_StreamConnect	Streams RTP audio from one channel to another
evRTP_StreamDisconnect	Disconnects previously connected RTP streams
evRTP_TimerStart	Starts or restarts a user application RTP timer
evRTP_TimerStop	Stops a user application RTP timer
evRTP_TxRxStart	Starts transmission and reception of RTP audio
evRTP_TxRxStop	Stops transmission and reception of RTP audio

eurovoice HMP events

EVHMPEVENT_DTMF	Triggers for each new incoming DTMF digit
EVHMPEVENT_DTMFSENDCOMPLETE	A completion event for evRTP_SendDTMF
EVHMPEVENT_GENTIMERCANCELLED	Triggers when a general timer is cancelled
EVHMPEVENT_GENTIMEREXPIRED	Triggers when an general timer expires
EVHMPEVENT_PLAYCOMPLETE	A completion event for evRTP_Play
EVHMPEVENT_RECORDBUFFER	Triggers as recording buffer becomes available
EVHMPEVENT_RECORDCOMPLETE	A completion event for evRTP_RecordStop
EVHMPEVENT_RTPSTARTED	A completion event for evRTP_TxRxStart
EVHMPEVENT_RTPSTOPPED	A completion event for evRTP_TxRxStop
EVHMPEVENT_RTPTIMERCANCELLED	Triggers when an application RTP timer is cancelled
EVHMPEVENT_RTPTIMEREXPIRED	Triggers when a user application RTP timer expires
EVHMPEVENT_SIPBYE	Triggers on an incoming SIP BYE request
EVHMPEVENT_SIPCALLCONNECTED	Triggers when a SIP call is connected
EVHMPEVENT_SIPCALLPROGRESS	Triggers with call progress information
EVHMPEVENT_SIPCALLTERMINATED	Triggers when a SIP call is disconnected
EVHMPEVENT_SIPHOLDRESPONSE	A completion event for on/off hold functions
EVHMPEVENT_SIPINFOREQUEST	Triggers on incoming SIP INFO request
EVHMPEVENT_SIPINFORESPONSE	A completion event for evSIP_SendINFO
EVHMPEVENT_SIPINVITE	Triggers on incoming SIP INVITE request
EVHMPEVENT_SIPNOTIFYREQUEST	Triggers on incoming SIP NOTIFY request
EVHMPEVENT_SIPNOTIFYRESPONSE	A completion event for evSIP_SendNotify
EVHMPEVENT_SIPOFFHOLDREQUEST	Triggers on incoming off-hold request
EVHMPEVENT_SIPONHOLDREQUEST	Triggers on incoming on-hold request
EVHMPEVENT_SIPOPTIONSRESPONSE	A completion event for evSIP_SendOptions
EVHMPEVENT_SIPREFERREQUEST	Triggers on incoming SIP REFER request
EVHMPEVENT_SIPREFERRESPONSE	A completion event for evSIP_SendREFER
EVHMPEVENT_SIPREGISTER	Triggers on incoming SIP REGISTER request
EVHMPEVENT_SIPREGISTERED	A completion event for evSIP_Register
EVHMPEVENT_SIPREINVITE	Triggers on incoming SIP INVITE during call
EVHMPEVENT_SIPREINVITERESPONSE	A completion event for evSIP_SendReInvite
EVHMPEVENT_SIPUNREGISTERED	A completion event for evSIP_UnRegister
EVHMPEVENT_SPEECHOFF	Triggers when speech is no longer detected
EVHMPEVENT_SPEECHON	Triggers when speech is detected

eurovoice HMP 1.1 prices

eurovoice HMP is licenced on a per channel basis, assigned to a specific PC/Server. A eurovoice HMP channel licence is required for each concurrent RTP session created by the calling application.

Licence keys provide between 2 to 250 HMP channels or for SIP-only usage. The licence key is then assigned to a specific server, using the HMP Licence Utility.

Multiple licence keys may be applied to the same PC / Server to increase the number of HMP channels supported.

Licences may be applied to physical or virtual PCs. In the case of a deployment to a cloud-based Virtual Machine (VM), it is important that the physical network interface (MAC address) does not change between VM restarts.

Licences may be migrated from one server to another, with prior payment of a licence migration fee. Licences may then be revoked on the original server and a replacement licence will be issued for deployment on a new server.

For developing and deploying SIP-only applications, the SDK may be used in a SIP-only mode. For this, a dedicated licence may be purchased, as detailed below:-

Item	Price (pounds sterling)
eurovoice HMP Licence (SIP & RTP)	£30 per channel - minimum of 2 channels
eurovoice HMP Licence (SIP-only)	£100 per server
eurovoice HMP licence revocation (required to migrate licences from one server to another)	£50 per licence key

Please note:

· For UK purchases, the above prices are exclusive of VAT

· For other EC countries we require your company VAT number

· We accept payment by VISA, MasterCard, Switch or Delta, or contact us for bank transfer details.

· Prices correct as at September 2021 (E&OE).

All sales are subject to our standard terms and conditions of sale.

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