Keybeep in handheld mode:

KBP_R fn da3b da3b 0004

The two overlapping da3b tones (697 Hz, -7 dBfs) are exactly the same
as in TCS211 reference.

This 2x da3b keybeep remains the same in an active call, and also when the
loudspeaker is enabled.  With the loudspeaker on, the beeps are very loud!

With the headset plugged in, the keybeep changes to:

KBP_R fn da0b da0b 0004

This headset mode keybeep still consists of two overlapping 697 Hz tones,
but now the amplitude of each single tone is -21 dBfs.

Keybeep duration is 120 ms in TCS211 reference, but only 80 ms in Pirelli's
version.

Switching to DTMF keypad mode:

All keys beyond the basic dial set generate the same tone as the # key:

TON_R fn bd4c 6683 0000 0001 000a 000a 0005 0000 0005 0000 0005 0000 0005

The above trace was captured in handheld mode.  The frequencies are the same
as in TCS211 reference (941 Hz low, 1477 Hz high), and the dBfs amplitudes are
also unchanged: -7 dBfs for the low tone, -5 dBfs for the high tone.

With the headset plugged in, the tone changes to:

TON_R fn bd0f 661a 0000 0001 000a 000a 0005 0000 0005 0000 0005 0000 0005

The new amplitudes are -21 dBfs for the low tone and -19 dBfs for the high tone.

The duration of the tone is 100 ms, same as in TCS211 reference.