ICX 500 Gateway
Doc.no.A100K12202
Page 109
Enable DTMF transmission by first pressing DAK key 3
Automatically when receiving a call from the SIP trunk:
Enable DTMF transmission when receiving calls from SIP Trunk node 100
In this example the SIP Trunk node is 100, you need to change this according to the node
number used.
Note that the data command $TRUNK_SIG requires AMC software 11.5.x.x or newer.