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Dialogic® Host Media Processing (HMP) Software
How to generate/detect DTMF tones using Voice Devices on Dialogic Host Media Processing Software Release 1.1 for Windows
How to generate/detect DTMF tones using Voice Devices on Dialogic Host Media Processing Software Release 1.1 for Windows*Problem Description:
The documentation for Dialogic Host Media Processing (HMP) Software Release 1.1 for Windows* does not specify how to generate/detect DTMF tones using voice devices for Inband or RFC 2833, with both H.323 and SIP protocols.
Solution Summary:
The user can attach a voice resource, such as dxxxB1C1, and use the R4 voice functions to generate DTMFs with dx_playtone(), and detect DTMFs with dx_getdig(). One way to do this is to attach the voice device in the call to gc_OpenEx(). For example, gc_OpenEx(linedevice, ":P_IP:N_iptB1T1:M_ipmB1C1:V_dxxxB1C1", EV_ASYNC, userattr);
Product List:
HMP 1.1 for Windows 2000
Glossary of Acronyms/Terms:
HMP – Host Media Processing
DTMF – Dual Tone Multi-Frequency
RFC 2833 – Request For Comment, RTP Payload for DTMF Digits
H.323 – ITU-T standards for packet based communications
SIP – Session Initiation Protocol
