By having above settings in FreeSWITCH, from my client i am sending DTMF signal as below, which is valid. Why FreeSWITCH still showing me the message: "2014-01-22 10:56:14.189517 [WARNING] sofia.c:7746 IGNORE INFO DTMF(3) (This channel was not configured to use INFO DTMF!)" ?

sent:

Via: SIP/2.0/WS 08palq603pjt.invalid;branch=z9hG4bK2883672

Max-Forwards: 69

To: <sip:5000@xxxxxx.com>;tag=6aH6tU6X29v9e

From: "Switch1" <sip:Switch1@xxxxx.com>;tag=ggoh4vn2g9

Call-ID: mhvggeoee4ffv0h8v1f3

CSeq: 2231 INFO

Content-Type: application/dtmf-relay

Supported: path, outbound, gruu

User-Agent: iSIP 0.3.0

Content-Length: 24

Signal= 3

Duration= 200

received: OK

Can anyone please confirm? Is it a BUG?