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How do I send a hook FLASH to a SIP Provider to use services like three-way conferencing?
Posted by Elena Brambilla, Last modified by Daniel Lizaola on 22 November 2017 04:21 PM
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By default the SmartNode handles hook FLASH events by itself, i.e. a call is held locally, and if it is transferred, it is looped locally as well. If you want to transmit the DTMF towards the far end, you must disable the additional servivces on the fxs interfaces. Example: interface fxs IF_FXS_00 no call-hold no call-waiting no call-transfer no additional-call-offering This is often used in fxs/fxo line extensions. To transport a hook flash to the SIP network, you also need to set the option in your voip profile. Example: profile voip default dtmf-relay rtp Options: dtmf-relay rtp - DTMF's and flash are transmitted by RFC2833 RTP events. This is the default setting. dtmf-relay signaling - DTMF's and flash are transmitted by SIP INFO messages. Regardless of what is configured, the SmartNode accepts incoming events of both methods. | |
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