17Item SpecificationReceiving sensitivity –18.0 dBm –18.0 dBm –27.0 dBm –28.0 dBmOverload optical power –3.0 dBm 0.0 dBm –9.0 dBm –8.0 dBmCentral wavelength 1310 nm 1310 nm 1310 nm 1550 nmMax. transmissiondistance 2 km (1.24 miles) 15 km (9.32 miles) 40 km (24.86miles)80 km (49.71miles)Fiber type 9/125 μmsingle-mode9/125 μmsingle-mode9/125 μmsingle-mode9/125 μmsingle-modeInterface cablesThe HIM-PS1P must work with an SFP transceiver module and an optical fiber with LC-type connectors.For the appearance and connection of a HIM-PS1P interface cable, see "Connecting an optical interfacecable."HIM-AL1P (RT-HIM-AL1P-H3)/HIM-AL2P (RT-HIM-AL2P-H3)The HIM-AL1P and HIM-AL2P are OC-3/STM-1 (155 Mbps) Asynchronous Transfer Mode (ATM)interface modules. The HIM-AL1P provides an SFP port and the port is provided with two LEDs, whichindicate the interface running status and fault detection status, respectively. The HIM-AL2P provides twoSFP ports.The HIM-AL1P/HIM-AL2P has the following features:• Supports frame formats of SDH STM-1 and SONET OC-3C.• Allows data scrambling transmission.• Supports line clock mode and internal clock mode.• Provides self loopback testing measures such as internal cell loopback, external SONET/SDHloopback, and remote loopback.• Supports hot swapping.