# OC48/STM16 POS IOA

> IOA label | ES2-S1 OC48 STM16 POS IOA
> Number of IOA ports | 1
> Software release | First supported: 7.0.1
> Description | 30 W maximum Half-height module See Module and Slot Combinations for more information on combining IOAs in a slot. Unchannelized, concatenated OC48/STM16 for POS
> Capability | OC48/STM16 HDLC framing
> Software features | See OCx/STMx POS IOAs for information about the layer 2 and layer 3 protocols and applications that this module combination supports.
> Model compatibility | E320 router E120 router
> Line module compatibility | ES2 4G LM
> SRP module compatibility | SRP-100 SRP-120 SRP-320
> Line module redundancy compatibility | Can be paired with an ES2 4G LM. Must be installed in the same redundancy group as an ES2 4G LM and ES2–S1 REDUND IOA combination.
> Module redundancy support | Yes (Redundancy IOA must be installed in either slot 0 or slot 11)
> Port redundancy support | Not applicable
> Cables and connectors (single-mode short reach [SR-1]) | Up to one LC full duplex connector Transmit power: min: –10 dBm max: –3 dBm Center wavelength: 1310 nm Receive input power: min: –18 dBm max: –3 dBm Rated for 2 km (1.2 miles) of 9-micron core cable See E120 and E320 Hardware Guide, Chapter 5, Cabling the Router for more information.
> Cables and connectors (single-mode intermediate [IR-1]) | Up to one LC full duplex connector Transmit power: min: –5 dBm max: 0 dBm Center wavelength: 1266 through 1310 nm Receive input power: min: –18 dBm max: –0 dBm Rated for 15 km (9.3 miles) of 9-micron core cable See E120 and E320 Hardware Guide, Chapter 5, Cabling the Router for more information.
> Cables and connectors (single-mode long reach [LR-2]) | Up to one LC full duplex connector Transmit power: min: –2 dBm max: 3 dBm Center wavelength: 1550 through 1580 nm Receive input power: min: –28 dBm max: –9 dBm Rated for 80 km (24.9 miles) of 9-micron core cable See E120 and E320 Hardware Guide, Chapter 5, Cabling the Router for more information.
> LEDs | Board-level LEDs: OK (green)—Physical link is connected properly and is functioning properly FAIL (red)—Failure detected Port LEDs: ALM—Bi-color LED: Yellow: Local loss of signal exists Red: Remote loss of signal exists OK (green)—SONET is up and port is functioning properly. If not lit, a problem exists.
> Alarms, errors, and events | See Monitoring SONET/SDH Interfaces in JunosE Physical Layer Configuration Guide, Chapter 3, Configuring Unchannelized OCx/STMx Interfaces.