Use Comms Check to send a communication check to an online device and review the result in RobustLink. It can also help a person at the site identify the device by observing its USR indicator.
On a supported device, the USR indicator flashes five times when the check is performed. A person at the site can observe it while you review the result in RCMS.
If the device is offline, restore its connection before trying the check. Some device models do not have a USR indicator and do not offer this action.