Zenitel IP Speaker connectors
From Zenitel Wiki
| Pin | Description | Comment |
| 1 | GPIO | General Purpose In Out |
| 2 | 5V+ | 5 volt output |
| 3 | Ext speaker (8ohm) | Connection for external 8 ohm loudspeaker |
| 4 | Ext speaker (8ohm) | Connection for external 8 ohm loudspeaker |
| 5 | Int speaker (8ohm) | Connection for internal 8 ohm loudspeaker |
| 6 | Int speaker (8ohm) | Connection for internal 8 ohm loudspeaker |
| 7 | Relay CO | Relay output, Common |
| 8 | Relay NO | Relay output, Normal Open |
| 9 | Line in/Mic | Audio input (positive) |
| 10 | Line in/Mic | Audio input (negative) |
| 11 | GND | Ground connector |
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Connectable conductors: 0.20 - 1.5 mm² (IEC) / 24 - 16 AWG (UL). Use of ferrules is recommended. Max cable size is then 0.75 mm². |
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