One OC-3/STM-1 ports are supported on some MDAs and on the TDM satellite. The ports can be configured for either SONET or SDH operation. SONET ports are configured for channelized OC-3 operation. SDH ports can be configured for channelized STM-1 operation.
The port’s transmit clock rate can be node or loop timed. The port’s receive clock rate can be used as a synchronization source for the system. The Section Trace (C1) byte can be configured by the user to ensure correct physical cabling. The port can activate and deactivate local line and internal loopbacks.
All SONET/SDH line alarms are configurable to be either enabled (default) or disabled. Link hold timers can be configured in 100ms increments to control link up and link down indications. The line signal degradation bit error rate (ber-sd) threshold and the line signal failure bit error rate (ber-sf) threshold can be configured.
The MDAs and TDM satellite support all standard SR OC-3/STM-1 SFP optics including multi-mode, intermediate reach, and long reach. Single fiber mode is not supported.
The MDA contains LEDs for power, status and one for each link state. The power LED is blue if power is connected and off if no power is present. The status LED is green when operationally up, amber when operationally down, off when administratively shutdown and blinking green during initialization. The link state LED is green when the link is established; amber when the link is down; and unlit when the port is shutdown.
When an Ethernet port is configured in WAN mode (xgig wan), you can change specific SONET/SDH parameters to reflect the SONET/SDH requirements for this port.