(at the cellular phone)
NOKIA SPECIAL at the cellular phone.
| Pin | Name | Description | 
|---|---|---|
| 1 | GND | Charger/System Ground | 
| 2 | V_OUT | Accessory Output Supply. (3.4V...10V - 50mA) | 
| 3 | XMIC | External Microphone Input and Accessory Identification | 
| 4 | NC | Not Connected | 
| 5 | NC | Not Connected | 
| 6 | MBUS | Serial Control Bus | 
| 7 | NC | Not Connected | 
| 8 | SGND | Signal Ground | 
| 9 | XEAR | External Speaker and Mute Control | 
| 10 | Hook | Hook Signal | 
| 11 | NC | Not Connected | 
| 12 | V_IN | Charging Supply Voltage (Max 16V) | 
| U low | U high | Description | 
|---|---|---|
| 1.15 V | 1.4 V | Compact Handsfree Unit Connected | 
| 1.7 V | 2.05 | Headset Adapter Connected | 
| U low | U high | Description | 
|---|---|---|
| 0.0 V | 0.5 V | Logic Low Level | 
| 2.4 V | 3.2 V | Logic High Level | 
| U low | U high | Description | 
|---|---|---|
| 0.0 V | 0.5 V | Mute ON (HF Speaker Mute) | 
| 1.0 V | 1.7 V | Mute OFF (HF Speaker Active) | 
| U low | U high | Description | 
|---|---|---|
| 0.0 V | 0.5 V | Hook Off (Handset in Use) | 
| 2.4 V | 3.2 V | Hook On (Handset in Use) | 
Contributor: Joakim Ögren
  Source:
  Nokia 1610 pinout at Technick.net
  Copyright © The Hardware Book Team 1996-2001.
  May be copied and redistributed, partially or in whole, as appropriate.
 Document last modified: 2001-06-08