In an incoming network 2-Party talk state connection and in an outgoing 2-party connection, the DTMF Negotiation feature will transport the necessary trunk (route) DTMF requirements (via access code, automatic or without) and the DTMF station requirements (DTMF flag) after the establishment of the call.

The "Block DTMF in Conference" flag is not transported in the network, since it is considered only a local optional flag.

After the transportation of the feature indicator fields, the digit sender party will be able to compose DTMF signals for the receiving party (remote device), when the receiving party (remote device) requires DTMF signaling.