CNreach N500 Serial Settings

We are trying to pass serial data in a simple 5 radio network. 1 access point and 4 endpoints. We can get the access point to communicate with an endpoint on the bench but cannot pass serial data via Hyperlink between the two radios. We have been unable to get tech support for the last 48 hours. Can anyone help?

Please contact me directly yonghao.lin@cambiumnetworks.com.