You can arrange it to be done with a technician, you need a 75 ohms coaxial cable with male BNC connectors cross-connected at each end (Rx<->Tx and vice versa), i think that you might also found it at many vendors:
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...