https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908394#M9907 Are you now using two J4853A's? You need to match the transceiver types when using fiber. <BR /><BR />Also you must reboot the switch when changing transceiver types. Wed, 06 Dec 2006 04:56:28 GMT Matt Hobbs 2006-12-06T04:56:28Z https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908393#M9906 Dear Sir/Madam,<BR />I used two switch HP 2524 connect together by fiber cable with J4131B module on each site.<BR />Recently, 1 of both J4131B wrong so I use J4853A for temporary but "they don't run"<BR />Help me please !<BR />Thanks a lot<BR /> Wed, 06 Dec 2006 01:56:10 GMT https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908393#M9906 phnhuong 2006-12-06T01:56:10Z https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908394#M9907 Are you now using two J4853A's? You need to match the transceiver types when using fiber. <BR /><BR />Also you must reboot the switch when changing transceiver types. Wed, 06 Dec 2006 04:56:28 GMT https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908394#M9907 Matt Hobbs 2006-12-06T04:56:28Z https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908395#M9908 Matt Hobbs is absolutely right.<BR />J4131B gigabit SX <BR />"Ports <BR />1 100Base-FX ports (IEEE 802.3u Type 100Base-FX) <BR />Duplex: half or full <BR />Connector: SC "<BR /><BR />"Cabling <BR />Type: <BR />62.5/125 µm or 50/125 µm (core/cladding) diameter, graded-index, low metal content, multimode fiber optic, complying with ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a, respectively <BR /><BR />Maximum distance: <BR />2 km (full duplex) or 412 m (half duplex) "<BR /><BR />but J4131B means"<BR />Ports <BR />1 1000Base-SX port (IEEE 802.3z Type 1000Base-SX) <BR />Duplex: full <BR />Connector: SC <BR /><BR />Physical characteristics <BR />Dimensions: 3.8 x 2.05 x 0.95 in. (9.65 x 5.21 x 2.41 cm) <BR />Weight: 0.09 lb. (0.04 kg ) <BR /><BR />Cabling <BR />Type: <BR />62.5/125 µm or 50/125 µm (core/cladding) diameter, graded-index, low metal content, multimode fiber optic, complying with ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a, respectively <BR /><BR />220 m (62.5 µm core diameter, 160 MHz/km bandwidth) <BR />275 m (62.5 µm core diameter, 200 MHz/km bandwidth) <BR />500 m (50 µm core diameter, 400 MHz/km bandwidth) <BR />550 m (50 µm core diameter, 500 MHz/km bandwidth) " Wed, 06 Dec 2006 22:09:18 GMT https://community.hpe.com/t5/switches-hubs-and-modems/hp-swicth-2524-j4131b-and-j4853a/m-p/3908395#M9908 Lei.Ma 2006-12-06T22:09:18Z