NEC 515 pinouts
The connector/pinout information may be applied to the NEC model 515
Universal Cell Phone 3-pole (mono) headset connector pinout cordless/cell phones headset/handsfree cable connector
NEC e313, e525, N8, N8i, e606, e616, e616v, e808, n341i, e228, 338 cell phones cable connector pinout for 525, 515, c313, e313, e525, e530, e535, e606, e616, e616v, c616v, e228, e808, e808s, e808y, n331i, n341i, n400i, n410i, n530i, n550i, n590i, n630i, n8, n700, n710, n830, n900, n8000 models