Unterschiede von HP GBIC-Modulen

Hallo.

Kann mir jemend die Unterschiede von diesen HP-GBIC-Modulen (SFP) erklären?

J4858C-NG
J4858C-C

Auf der HP-Seite http://www8.hp.com/h20195/v2/GetHTML.aspx?docname=c04168409
findet man nur allgemeines zum Modul bis zum 1. C in der Produktbezeichnung.

Auch die Gurgel spuckt nichts aus.

Details dazu von HP:

Technical Specifications

HP X121 1G SFP LC SX Transceiver (J4858C)

A small form-factor pluggable (SFP) Gigabit SX
transceiver that provides a full-duplex Gigabit solution
up to 550 m on multimode fiber.
Ports
1 LC 1000BASE-SX port; Duplex: full only
Physical characteristics Dimensions: 2.24(d) x 0.54(w) x 0.48(h) in. (5.69 x 1.37 x 1.22 cm)
Weight: 0.04 lb. (0.02 kg)
Transceiver form factor: SFP
Environment Operating temperature: 32°F to 158°F (0°C to 70°C)
Operating relative humidity: 5% to 85%, noncondensing
Nonoperating/Storage temperature: -40°F to 203°F (-40°C to 85°C)
Altitude: up to 10,000 ft. (3 km)
Electrical characteristics Power consumption typical: 0.4 W
Power consumption maximum: 0.7 W
Cabling

Type:

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;

Maximum distance:

2-220 m (62.5 µm core diameter, 160 MHz*km bandwidth
2-275 m (62.5 µm core diameter, 200 MHz*km bandwidth
2-500 m (50 µm core diameter, 400 MHz*km bandwidth)
2-550 m (50 µm core diameter, 500 MHz*km bandwidth)

Cable length: 2-550m
Fiber type: Multi Mode
Services Refer to the HP website at www.hp.com/networking/services for details on the service-level descriptions and product numbers. For details about services and response times in your area, please contact your local HP sales office.