# OC3-2 GE APS I/O Modules Overview

ERX7xx models, ERX14xx models, and the ERX310 router all support the OC3-2 GE APS I/O module.

The OC3-2 GE APS I/O module pairs with the OC3/STM1 GE/FE line module to provide Gigabit Ethernet operation through one line interface and OC3 STM1 ATM operation through two line interfaces.

The OC3-2 GE APS I/O module uses a range of SFPs to support different optical modes and cabling distances, and accepts up to three LC-style fiber-optic or copper SFPs. You can configure only port 2 for Gigabit Ethernet interfaces; port 0 and port 1 are reserved for OC3/STM1 ATM interfaces.

For more information about configuring OC3/STM-1 ATM interfaces on this I/O module, see OC3/STM1 GE/FE Line Module.

| Note: The OC3-2 GE APS I/O module does not support APS in the current release.

#### Related Documentation

- Gigabit Ethernet I/O Modules and IOAs Overview
- GE I/O Modules Overview
- GE-2 SFP I/O Modules Overview
- GE-8 I/O Modules Overview
- ES2-S1 GE-4 IOAs Overview
- ES2-S1 GE-8 IOAs Overview
- ES2-S3 GE-20 IOAs Overview