ATM Pseudowire Overview
An Asynchronous Transfer Mode (ATM) pseudowire acts as a Layer 2 circuit or service, which allows the migration of ATM services to an MPLS packet-switched network without having to provision the ATM subscriber or customer edge (CE) device. When you configure an ATM pseudowire, the network between the customer edge (CE) routers appears transparent to the CE routers, making it seem that the CE routers are directly connected across a time-division multiplex (TDM) leased line. ATM pseudowires are primarily used in an ATM service provider’s network to connect existing ATM switches across a higher speed packet-switched network or to provide ATM backhaul services for remote access to existing ATM networks.
On ACX series routers, you configure an ATM pseudowire with Layer 2 encapsulation for Inverse Multiplexing for ATM (IMA).