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# OC3/STM1 GE/FE Module Combination

> Line module label | OC3/STM1 GE/FE
> I/O module label | OC3-2 GE APS I/O
> Number of I/O ports | 3; one active and one redundant port per SFP Ports 0 and 1—ATM interfaces Port 2—GE interface Port redundancy is not supported.
> Software release | First supported: 6.1.0 Final supported: Not applicable
> Description | 150 W Unchannelized OC3/STM1 ATM operation via two line interfaces and Gigabit Ethernet operation via one line interface The I/O module uses a range of small form-factor pluggable (SFP) transceivers to support different modes and cabling distances. Depending on the configuration, a variety of SFP combinations can occur. The OC3-2 GE APS I/O module accepts up to three LC-style fiber-optic or copper SFPs. 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 table (Single-strand SFPs Pairing) for more information.
> Type | EFA ASIC
> Capability | OC3/STM1 ATM/AAL5 Ethernet (IEEE 802.3x) 1000Base-LX/SX/ZX
> Software features | See OCx/STMx GE/FE 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 (ATM LX) | LC-style fiber-optic connectors Tx power: min: –19.0 dBm max: –14dBm Center wavelength: 1310 nm Rx input power: min: –30 dBm max: –14 dBm Rated for 2 km (1.2 miles) over 62.5-micron core cable with an optical loss of 0–9db or over 50-micron core cable with an optical loss of 7 db See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> Cables and connectors (ATM SX) | LC-style fiber-optic connectors Tx power: min: –15.0 dBm max: –8 dBm Center wavelength: 1310 nm Rx input power: min: –31 dBm max: –8 dBm Rated for 15 km (9.3 miles) of 9-micron core cable See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> Cables and connectors (ATM ZX) | LC-style fiber-optic connectors Tx power: min: –5.0 dBm max: 0 dBm Center wavelength: 1310 nm Rx input power: min: –34 dBm max: –7 dBm Rated for 40 km (24.8 miles) of 9-micron core cable See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> Cables and connectors (GE LX) | 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 (GE 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 (28.85 miles) over 9-micron core cable See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> Cables and connectors (GE SX) | LC full duplex Tx power: min: –9.5 dBm max: –4 dBm Center wavelength: 850 nm Rx input power: min: –17 dBm max: –3 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.
> Cables and connectors (GE ZX) | LC full duplex Tx power: min: –3 dBm max: 2 dBm Center wavelength: 1550 nm Rx input power: min: –23 dBm max: –3 dBm Rated for 70 km (43.4 miles) over 10-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 SONET/SDH Interfaces in JUNOSe Physical Layer Configuration Guide, Chapter 3, Configuring Unchannelized OCx/STMx Interfaces.

> Table 10: 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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