Before use this function, please make sure your two HM100P have already paired and connected. How to pair them please refer to -http://help.avantree.com/hc/en-us/articles/202733039
How to use intercom?
| Button | Function | Operation |
| V+,V- | Send out intercom | Press and hold V+ and V- together for about 2s. Then release it, you will hear a short tone. |
| MFB | Answer intercom | Press MFB button once |
| MFB | End intercom | Press MFB button once |
| MFB | Reject intercom | Press and hold MFB button for about 2s |
| V+ | Volume up | Press V+ button once |
| V- | Volume down | Press V- button once |
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