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| BTR-800/700/80N Intercom Connector | |||
| pin # | Use | Color | |
| 1 | Intercom Common | Shield | |
| 2 | Channel 1 | ||
| 3 | Channel 2 | ||
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| BTR-800/700/80N Front Panel Headset | |||
| pin # | Use | Color | notes |
| 1 | Mic Low | ||
| 2 | Mic High | ||
| 3 | Ear Low | ||
| 4 | Ear High | ||
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| BTR-800/700/80N 4-Wire Connection RJ-11 Female | |||
| pin # | Use | Color | notes |
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