Cisco 2 Port E1 Spare 1536Mbit/s networking card

2-Port Multichannel E1 G.703/G.704 120-ohm Interface Cisco's new family of multichannel port adapters heralds a new era for cost-effective and flexible WAN connectivity.
The family of multichannel interfaces for the Cisco 7200 and Cisco 7500 Series routers reduces cost and enhances manageability of WAN links by:
- Eliminating the need for any external channel service
- units/data service units CSU/DSUs)) or multiplexers
- Providing up to 128 software-configurable WAN connections per single-wide port adapter
- Supporting channel bandwidth from 64kbps, nx64 kbps, to full T1 or E1.
- Handling all major encapsulations, including Integrated Services Digital Network (ISDN) and Frame Relay