Destination & is not a telecommunications server

What causes this issue?

Destination &V1& is not in table T164O.
Only destinations maintained in T164O are telecommunications servers.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please assign your telecommunications request to a permissible server.

Error message extract from SAP system. Copyright SAP SE.