On 5/5/10 7:20 PM, Carlos Alcantar wrote:
Actually a while back Metaswitch in there 6.0 software release had a bug where it would not pass dtmf tones if the calls was not in a connected status state which was causing issues with ivr?s with airlines ect.
That shouldn't be considered a bug, it's a feature. Forward audio should not cut through when not connected in order to prevent toll fraud. This goes back to the old blue box/black box days, specifically the black box. If there is two-way audio before answer supervision, the receiving party can game the system so that the calling party is not billed for completed calls. Just don't return answer supervision, stop the ringback tone, and converse. Reverse audio is needed to play ringback, busy tone, intercept messages, etc. Forward audio as a rule should be blocked until the call is connected (and the meter is running for toll charges). If airline IVRs are playing the airline's greeting and accepting DTMF or inbound audio before connection, then the airlines are stealing from their 800-provider (if toll-free) or their callers' carriers (if toll). -- Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV