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# GE 1000Base-SX Module Combination (1 Port) (256-MB Memory)

> Line module label | GE/FE
> I/O module label | GE I/O SFP
> Number of I/O ports | 1 active, 1 redundant
> Software release | First supported: 5.0.0 Final supported: Not applicable
> Description | 130 W Gigabit Ethernet 256 MB of memory The 128-MB version has reached end-of-life. The I/O module uses a range of small form-factor pluggable (SFP) transceivers to support different modes and cabling distances. Uses either optical or copper SFPs. The optical transceivers are 1000Base-SX compliant. The copper transceivers are 1000Base-T compliant. Single-strand SFPs can be used. These SFPs work in pairs and require a matching SFP at the opposite end of the Ethernet connection. For example, an SFP rated at TX 1310, RX 1550 must be paired with an SFP rated TX 1550, RX 1310 with the same maximum operating range. See the following corresponding table (Single-strand SFPs Pairing) for more information.
> Type | EFA ASIC
> Capability | Ethernet (IEEE 802.3z) 1000Base-SX
> Software features | See Ethernet Modules for information about the layer 2 and layer 3 protocols and applications that this module combination supports.
> Model compatibility | ERX-7xx models ERX-14xx models ERX-310 router
> SRP module compatibility | SRP-5G+ SRP-10G SRP-40G SRP-40G PLUS SRP-SE10G
> Module redundancy support | Not applicable
> Cables and connectors (copper SFP) | Maximum range is 100 meters on CAT5 cable.
> Cables and connectors (SX) | LC full duplex Tx power: min: –9.5 dBm max: –4 dBm Center wavelength: 850 nm Rx input power: min: –20 dBm max: –0 dBm Rated for 275 m (300 yards) over 62.5-micron core cable Rated for 550 m (601 yards) over 50-micron core cable See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> LEDs | See Module LEDs.
> Alarms, errors, and events | See Monitoring Ethernet Interfaces in JUNOSe Physical Layer Configuration Guide, Chapter 5, Configuring Ethernet Interfaces.

> Table 2: Single-strand SFPs Pairing

> Fiber Type | Nominal Wavelength (nm) | Maximum Operating Range (kilometers)
> 9 microns | TX 1310, RX 1550 Pairs with TX 1550 / RX 1310 | 10 (6.2 miles), matching SFP must have the same operating range
> 9 microns | TX 1550 / RX 1310 Pairs with TX 1310, RX 1550 | 10 (6.2 miles), matching SFP must have the same operating range
> 9 microns | TX 1310, RX 1490 Pairs with TX 1490 / RX 1310 | 10 (6.2 miles), matching SFP must have the same operating range
> 9 microns | TX 1490 / RX 1310 Pairs with TX 1310, RX 1490 | 10 (6.2 miles), matching SFP must have the same operating range
> 9 microns | TX 1310, RX 1550 Pairs with TX 1550 / RX 1310 | 40 (24.85 miles), matching SFP must have the same operating range
> 9 microns | TX 1550, RX 1310 Pairs with TX 1310 / RX 1550 | 40 (24.85 miles), matching SFP must have the same operating range

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