This sets how long the forward digit tone stays on for outgoing R2 registers using pulse-based, non-compelled, signaling, with the tone automatically turning off once this timer expires. Unlike compelled signaling's acknowledgment-driven timing, pulsed signaling is purely timer-driven, so this object directly controls the on width of each dialed digit pulse, which is critical because far-end pulse detectors require pulses to fall within a specific duration range to be read correctly. With this set to 60 ms, each outgoing forward digit pulse on this R2 trunk would be exactly that wide, which must align with the far end's expected pulse-width tolerance for non-compelled digit reception.