65Item MIM-1CPOS(E)/MIM-1CPOS(T)Interface standard SONET OC-3/SDH STM-1Interface rate 155.52 MbpsIMPORTANT:If the interface receives signal over a long-haul optical fiber, make sure the transmission distance islonger than 25 km (15.53 miles). If the transmission distance is shorter than 25 km (15.53 miles), usean optical attenuator to reduce the optical power.Interface LEDsFigure 69 MIM-1CPOS(E) front panelFigure 70 MIM-1CPOS(T) front panelTable 90 LED descriptionLED DescriptionLINK • Off: No link is present.• On: A link is present.ACT • Off: No data is being transmitted or received.• Flashing: Data is being received or transmitted.Transceiver modules, optical fibers, and connection methodsFor more information about transceiver modules, optical fibers, and the connection methods, see"Fiber port."E1/T1 interface module• MIM-1E1• MIM-2E1• MIM-4E1• MIM-1E1-F• MIM-2E1-F• MIM-4E1-F• MIM-8E1