DTMF Controlling Party

By default the B-Party is in control of DTMF interaction for functionality such as Call Recording muting, Mid Call Divert. This can be configurable by enabling the “DTMF Controlling Party” optional setting on the Start node.

“DTMF Controlling Party” allows one channel at a time (i.e. the A or the B Party) to 'listen' for DTMF tones - however, on some phone systems, audio can 'bleed' from one channel to the other - i.e. if the B Party is responsible for invoking MCD, but the A Party generates a DTMF tone (or a frequency within the audio channel that mimics a DTMF tone), then MCD could be invoked. This is less likely to happen if one or both parties are mobiles, or SIP calls.

Key	Description	Invoked By	Comments
#	Mid Call Divert with ringing for A Party	B Only	The A party will hear ringing while the B Party invokes MCD.
*	Mid Call Conference	B Only	All parties remain in the call during the B Party’s invocation of MCC – all parties will hear any DTMFs keyed by the B Party.
0-0	Call Recording Muting	A and B	The party invoking this feature will hear the confirmation tones.
1	Mid Call Divert with music for A Party	B Only	The A party will hear ringing as the B Party invokes MCD.
7	On Demand Call Recording	A and B	The party invoking this feature will hear the confirmation tones.
9-7-2-7-2	Force Terminate B Party	B Only	See comments on ‘Called Subscriber Held’ network timer. Allows the B Party to drop their call leg in order for the A Party to continue with any Post Call activity.
8-2-7 Or Key *	Force Terminate B Party The key(s) used here is configurable using the BPartyForceClearDTMF property on the ‘DTMF Controlling Party’ optional setting on the Start Node. When setting this to the star key the Mid-Call Conference functionality is disabled.	A Only	See comments on ‘Called Subscriber Held’ network timer. Allows the A Party to drop the B Party leg of the call in order for the A Party to continue with any Post Call activity.
2-1	Mid Call Divert with ringing for A Party – Transmit CallID as DTMF to C Party	B Only	The A Party will hear ringing while the B Party invokes MCD. The Unique Call ID is transmitted to the C Party as DTMF when the C Party answers.
2-3	Mid Call Breakout	A and B	The A party will hear the configured On Hold audio whilst the B party goes through the Mid Call sequence of nodes and then they are reconnected.
2-4	Mid Call Breakout	A and B	The B party will hear the configured On Hold audio whilst the A party goes through the Mid Call sequence of nodes and then they are reconnected.
2-9	Parties On Hold	A and B	All parties will hear the configured On Hold audio until the # key is pressed by the DTMF controlling party to stop the music and rejoin the callers.