NEC 121, 343, N343i cell phones cable connector pinout 
5 GND
9 Rx
10 Tx
NEC 4000 cell phones pinout 
3 GND
8 Rx
9 Tx
NEC 606, 808 cell phones cable connector pinout 
8 Tx
9 Rx
10 GND
NEC E122 cell phone cable connector pinout 
1,2 GND
9 Rx
10 Tx
NEC N21, N21i, N22, N22i, N223i cell phones cable connector pinout 
5 GND
10 Tx
11 Rx
NEC N342i cell phone pinout 
4 Gnd
3 RxD
1 TxD
NEC N610 cell phone pinout 
5,6 +5v ?
3,8 GND
17 Tx
18 Rx
NEC P3 cell phones pinout
+----------------------+
| 1 2 3 4 5 6 |
| o o o o o o |
| O |
| o o o o o o |
| 7 8 9 10 11 12 |
+----------------------+
1 Audio out (EAR)
2 Audio out (EAR/SPEAKER)
3 Audio out (SPEAKER)
4 SDATA (Serial Data)
5 No Connect
6 VCC (+8V)
7 No Connect
8 Audio in (MIC)
9 GND
10 BUSY
11 SCLK (Serial Clock)
12 GND
NEC e313, e525, N8, N8i, e606, e616, e616v, e808, n341i, e228, 338 cell phones cable connector pinout
1 Gnd
2 Rx USB D+ at least in NEC N8, E616, E313.
3 Tx USB D- at least in NEC N8, E616, E313.
4 Vcc USB +5V
5 + charger input, power from PC USB (+5V) may be used for charging
Nec 412i, 949, L1 cell phones cable connector pinout
1 USB Vbus +5V
2 USB D+
3 USB D-
4 GND