Where does “maksusykäys” come from?

maksusykäys (Finnish) comes from Finnish sykäys, from Finnish sykähtää, from Finnish sykkiä, from Finnish -ia, from Proto-Finnic -idak, from Proto-Uralic -j-.

maksusykäys (Finnish): metering pulse, billing pulse, tax pulse signal sent by a telephone exchange during a phone call and used as billing unit

Definitions

metering pulse, billing pulse, tax pulse signal sent by a telephone exchange during a phone call and used as billing unit

Ancestry of “maksusykäys”, step by step

maksusykäys traces back through two separate lines of ancestry.

via Finnish sykäys

Step	Language	Word	Meaning
1	Finnish	sykäys	(single) pulse
2	Finnish	sykähtää	to beat (once) of the heart
3	Finnish	sykkiä	to pulse, pulsate; to beat, throb; to be aroused
4	Finnish	-ia	Forms primarily transitive verbs describing...
5	Proto-Finnic	-idak	applicative suffix
6	Proto-Uralic	-j-	—

via Finnish maksu

Step	Language	Word	Meaning
1	Finnish	maksu	fee; payment
2	Finnish	maksaa	to cost; to pay; to pay back, repay
3	Proto-Finnic	maksadak	to cost; to pay
4	Proto-Finno-Permic	maksa-	—

Every word from Proto-Uralic -j- →Every word from Finnish -ia →Every word from Proto-Finnic -idak →