Configuring E1 and E3 Interfaces
E1 is a standard WAN digital communication format designed to operate over copper facilities at a rate of 2.048 Mbps. E3 is a high-speed WAN digital communication technique designed to operate over copper facilities at a rate of 34.368 Mbps. Both are widely used outside North America. E1 is a basic time division multiplexing scheme used to carry digital circuits, and E3 is the time division multiplexing scheme used to carry 16 E1 circuits.
To configure E1-specific physical interface properties, include the e1-options statement:
[edit interfaces interface-name] e1-options { bert-error-rate rate; bert-period seconds; fcs (32 | 16); framing (g704 | g704-no-crc4 | unframed); idle-cycle-flag (flags | ones); loopback ...
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