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# GE High Density (HDE) Module Combination (8 Ports)

> Line module label | GE-HDE
> I/O module label | GE-8 I/O
> Number of I/O ports | 8
> Software release | First supported: 7.0.0 Final supported: Not applicable
> Description | 100 W Gigabit Ethernet 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-LX/LH 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. For information about bandwidth and line rate considerations for the GE–HDE module combination, see GE-8 I/O Module in JUNOSe Physical Layer Configuration Guide, Chapter 5, Configuring Ethernet Interfaces.
> Type | FFA ASIC
> Capability | Ethernet (IEEE 802.3z) 1000Base-LH
> Software features | See Ethernet Modules for information about the layer 2 and layer 3 protocols and applications that this module combination supports.
> Model compatibility | ERX1440 router ERX310 router
> SRP module compatibility | SRP-40G SRP-40G PLUS SRP-SE10G
> Module redundancy support | Not applicable
> Cables and connectors | LC full duplex Tx power: min: –9.5 dBm max: –3 dBm Center wavelength: 1300 nm Rx input power: min: –20 dBm max: –3 dBm Rated for 10 km (6.2 miles) over 10-micron core cable See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> Cables and connectors (single-mode LX40) | LC full duplex Tx power: min: –4.5 dBm max: 0 dBm Center wavelength: 1300 nm Rx input power: min: –35 dBm max: –22.5 dBm Rated for 40 km (24.85 miles) over 9-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 9: 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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