Motorola A845 pinouts
The connector/pinout information may be applied to the Motorola model A845
Universal Cell Phone 3-pole (mono) headset connector pinout cordless/cell phones headset/handsfree cable connector
Motorola A840 , C650 , E1 , E398 , i335 , i425 , ic902 , MOTO Q 9c , MOTO Q 9m , V360 , V361 , V365 headset pinout should work with V360, E815 and some others
Motorola A630,A835,A845,A1000, i205,i305,i530,i830,i860,i710,i730,i733,i736,i836,i930, V120,V265,V262,V260,V276,V300,V400,V500,V505,V551,V525,V545,V547, V550,V600,V620,v60t,V60,V60i,V60p,V60s,V66,V70,V710,V800,V80,V950,V980,V975,V1050 cell phones cable connector pinout also for ROKR E1, E398,E550,E815,E1000, T280,T720,T730,T722i,T721, 270c, C331t, C343, C353t, C975, C980, 120x, A920, A295, Nextel i205, i305, i530, i730, i830, i930 models. This interface also known as Motorola CE bus.
MRLG 4-pole 2.5mm headset connector pinout MRLG pinout