# cOC3/STM1 Multimode Module Combination

> Line module label | cOCx/STMx F0
> I/O module label | cOC3 STM1 F0 I/O MULTI MODE
> Number of I/O ports | 4
> Software release | First supported: 2.2.0 Final supported: 15.0.x
> Description | 130 W OC3/STM1 channelized to DS3, DS1, E1, and DS0 Supports either E1 or T1 operation, but not E1 and T1 operation simultaneously
> Type | EFA ASIC
> Capability | OC3/STM1 DS3 T1, E1 DS0 HDLC framing
> Software features | See ERX Module Guide, Appendix A, Module Protocol Support for information about the layer 2 and layer 3 protocols and applications that this module combination supports.
> Model compatibility | ERX7xx models ERX14xx models ERX310 router
> SRP module compatibility | SRP-5G+ SRP-10G SRP-40G SRP-40G PLUS SRP-SE10G
> Module redundancy support | 1:N redundancy NOTE: Line module redundancy is not supported on the ERX310 router.
> Cables and connectors | Up to four SC full duplex connectors Tx power: min: –19 dBm max: –14 dBm 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 0–9 dB or 50-micron core cable with an optical loss of 7 dB See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> LEDs | See ERX Module Guide, Appendix B, Module LEDs.
> Alarms, errors, and events | See Monitoring Interfaces in JunosE Physical Layer Configuration Guide, Chapter 4, Configuring Channelized OCx/STMx Interfaces.