 16 pin Bosch 509 cellphone special connector at the mobile phone | | Pin | Signal | Description |
| 1 | GND | |
| 12 | DP1_TXD | |
| 13 | DP1_RXD | |
| 14 | DP1_CTS | |
| 2 | DP1_DTR | |
| 9 | DP1_RI | |
| 3 | DP1_RTS | |
| 15 | DP1_DCD | |
| 4 | GND | |
| 6 | DP2_RTS/ (SYNC | |
| 11 | DP2_TXD (DIN) | |
| 5 | DP2_RXD (DOUT) | |
| 7 | DP2_CTS/ (CLK) | |
| 10 | Vbatt | |
| 8 | Vext DC | |
Source:www.pinouts.ru
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