A quick overview of the ports used with BToE application and the direction they require to be open
| Port Number | Type | Description | Direction |
| 24802 | UDP | For audio streaming. | Phone => PC |
| 6000 | TCP | For SSH client connection (plink.exe). Used inside computer. (BToE application to Plink.exe) | |
| Dynamic | TCP | Plink.exe uses a dynamic port for connecting to VVX. | Phone <=> PC |
| 22 (On VVX) | TCP | VVX Uses this port to get connected with computer | Phone <=> PC |
| application. (Secure connection) | |||
| 2081 | UDP | Discovery packet broadcast is done on this port by VVX. | Phone => PC |
| 24801 | TCP | VVX and computer App will communicate each other using this port (non-secure connection) | Phone <=> PC |
| 24804 | TCP | VVX and the computer application will communicate with each other using this port (secure connection). This port is used by VVX Business Media Phones when in Manual Pairing Mode . BToE 3.7.0 or later | Phone <=> PC |
The dynamic port range is described => here <=
For more details please check the current BToE Release notes
BToE Discovery:
BToE Discovery is sent from the Phone to the BToE App to discover the Phone.
udp.port == 2081
If you are unable to see the above a Firewall on the PC is blocking the BToE Discovery
If you can see the above but BToE still not offers to pair and prompt the user to enter their credentials on the Skype for Business client then a local policy or as an example, Symantec Endpoint Protection blocks the communication.