Simulation with some modifications:

1. IDU unit belonging to a Philips MDI microwave equipment in the 15 GHz band, responsible for interconnecting the backbone and office network in 2 Mb/s frames
2. Digital distributor to distribute 2 Mb/s tributaries
3. Newbridge 3612 node, linked via V35 interface (using Siemens DAG64 converter)
4. Alcatel A12 telephone switchboard. In this specific case, said switchboard is connected to the Multiplex. Other models do it using a 2 Mb/s frame. Using a QDF pair strip, you can reach the user terminals
5. First level local multiplex. Model MX''M from the EyP firm