This read-write TruthValue determines whether DTMF (Dual Tone Multi Frequency) digits are transported to the far endpoint, and its configured value only applies when the call agent does not specify DTMF handling in the CRCX request. An admin cares because reliable DTMF relay is essential for services like IVR menu navigation and voicemail that depend on receiving accurate touch-tone digits across the call. For example, an operator supporting IVR-heavy traffic through VISM without explicit per-call agent overrides would set this to true to ensure DTMF digits are always relayed.