GTNU

The GTNU is the GSM TDM switching network unit in the BSC. It is installed in slots 4-5 in the GMPS/GEPS/GTCS. The GTNU is configured in pairs and work in active/standby mode.

• Functions of the GTNU
  The GTNU serves as the switching center for the CS services of the entire system.
• GTNU Panel
  The components on the GTNU panel are the LEDs and ports.
• LEDs on the GTNU Panel
  There are three LEDs on the GTNU panel: RUN, ALM, and ACT.
• Ports on the GTNU Panel
  The GTNU panel provides six ports labeled TDM0-TDM5,