ICX 500 Gateway
Doc.no.A100K12202
Page 108
7.3.9. Transmit DTMF signal from AlphaCom
7.3.9.1. Outgoing calls to SIP trunk
The DTMF signals ‘*’ and ‘#’ will be transmitted to the line when DAK 1 (*) and DAK 2 (#) is
pressed during an outgoing telephone conversation. No programming is required.
7.3.9.2. Incoming calls from SIP trunk
By default, digits dialled on an intercom station will be handled locally in the ICX-500, and not
transmitted out on the SIP trunk.
To be able to send DTMF signals to the SIP trunk, one has to set the station in a certain mode
by the data command $TRUNK_SIG. The mode can be set either:
•
Manually by pressing as DAK key during the call, or
•
Automatically when a call is received from the SIP trunk
Manually by pressing a DAK key:
