3com Router 2-Port FXO MIM networking card

Router 2-Port FXO MIM Maximize Performance with Optional Interface Modules
These Multi-function Interface Modules (MIMs) provide a variety of expansion options that let you enhance router performance to optimize network operation. Customize your network to your business needs.
Provides 2 FXO ports for connection to a PABX
Facilitates scalable and secure network operation
Maximizes interface density and slot efficiency
For use in 3Com Router 5012, Router 5232, Router 5642 and Router 5682