GXW4108 does not pass hook flash to PSTN


#1

Hi,

I have GXW4108 (latest sw version, FXO ports). I am trying to sort out the hook flash (for the GW to pass it from the SIP trunk to PSTN analogue line).

One of the old release notes state- “Added support for regeneration of hook flash event upon receiving event from VoIP side via SIN INFO or RFC2833”

I would like to send DTMF 16 out of band with RFC2833 indicating in the telephony events 0-16 in the INVITE SDP to the GW. However the GW respond with 0-11.

Could anyone please let me know if this can be changed/configured somewhere on the GW.

Thanks


#2

What is sending the DTMF?


#3

The DTMF is sent by a voip phone as out of band telephony events (RFC2833)


#4

And using Wireshark you have confirmed the phone sends Event 16?


#5

Yes, but my main question is why the GW puts 101 0-11 in the SDP rather than 0-16


#6

Cannot answer that. You will need to submit a ticket to the help desk and include the pcap file showing that the phone is indeed sending the Event 16.