SIP for the VoIP Client in IGEL OS
You can change SIP-specific settings for the proxy, forwarding and the multi-frequency dialing process (DTMF).
Menu path: Setup > Sessions > VoIP Client > SIP
- Outbound Proxy: URI of the SIP proxy that handles outbound calls. 
- Forward URI: SIP URI to which inbound calls are forwarded if forwarding is enabled. You will find further information on forwarding under Call Options. 
- Send DTMF as: Specifies how key sequences are transmitted while a connection is in place. 
 Possible values:- INFO: The key sequence is transmitted as SIP INFO. 
- RFC 2833: The key sequence is transmitted using RTP (Real-time Transport Protocol). 
 
