Cisco 3825 Hardware Installation Guide - Page 180

ATM T3 and E3 Network Modules Chapter 11 Connecting ATM Network Modules Note The ATM T3 network module has a sensitive receiver. If you use a short T3 cable, it is possible to saturate the receiver, leading to bit errors. If this occurs, we recommend one of the following: • Reduce the transmit level of the device attached to the T3 network module. Many devices have a line build-out (LBO) configuration setting for this purpose. • Insert a 4-dB attenuator on the receive side of the T3 network module. Connecting ATM T3 and E3 Ports to the Network Use a coaxial cable to connect the module BNC port to a T3 or E3 network. ATM T3 Network Module and ATM E3 Network Module LEDs The ATM T3 network module and the ATM E3 network module have the LEDs shown in Table 11-2. Table 11-2 ATM T3 Network Module and ATM E3 Network module LEDs LED Color EN Green RCLK Green FERF Yellow OOF Yellow AIS Yellow Meaning Module has passed its self-tests and is available to the router. Receive clock has been detected. Far-end receive failure. Out of frame. Alarm indication signal. ATM T3/E3 Network Module LEDs Table 11-3 shows the LEDs for the combined ATM T3/E3 network module. Table 11-3 ATM T3/E3 Network Module LEDs LED Color TXCL Green RXCL Green RXALM Yellow RXCR Green Loopback LED Green Meaning Cell transmitted. Cell received. Alarm indication signal. Carrier present. Loopback 11-4 Cisco Network Modules Hardware Installation Guide OL-2485-20