E1 Link Features

E1 interfaces support the following link protocols: PPP, ATM, and TDM
E1 interfaces support the loopback function, including local loopback and remote loopback.
PPP on E1 interfaces supports:
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LCP
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IPCP
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MPLSCP
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MP
ATM on E1 interfaces supports:
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A single E1 ATM TC link
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Multiple E1 ATM links that are bound as an inverse multiplexing over ATM (IMA) group
TDM on E1 interfaces supports:
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Emulation of TDM E1 services for transparent transmission
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Circuit emulation service (CES) implemented by using pseudo wire emulation edge-to-edge (PWE3)
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Fractional E1. Different timeslots of an E1 can be bound into different CES PWs.
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Structure-Aware TDM Circuit Emulation Service over Packet Switched Network (CESoPSN) and Structure-Agnostic Time Division Multiplexing over Packet (SAToP) services