# OC12/STM4 ATM Multimode Without APS/MSP Redundancy Module Combination (256-MB Memory)

> Line module label | OCx/STMx ATM or OCx/STMx /DS3-ATM
> I/O module label | OC12 STM4 I/O MULTI MODE
> Number of I/O ports | 1
> Software release | First supported: 5.0.0, 5.3.0 or a higher-numbered release Final supported: Not applicable
> Description | 130 W 256 MB of memory The 128-MB version has reached end-of-life. Unchannelized, concatenated OC12/STM4 for ATM
> Type | EFA ASIC
> Capability | OC12/STM4 ATM/AAL5
> Software features | See OCx/STMx ATM Modules 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 | SC full duplex 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 Module LEDs.
> Alarms, errors, and events | See Monitoring SONET/SDH Interfaces in JunosE Physical Layer Configuration Guide, Chapter 3, Configuring Unchannelized OCx/STMx Interfaces.