Can the E1 interface of an AR router interconnect with the Ethernet

The E1 interface of an AR router cannot interconnect with the Ethernet.

- E1/T1: E1/T1 is a technology of using the synchronous time division multiplexing technology to combine multiple audio channels into a 2 Mbit/s or 1.5 Mbit/s high-speed channel. It is used in WAN in general.
- Ethernet: Ethernet uses the Carrier Sense Multiple Access (CSMA) and Conflict Detection (CD) technologies and runs on cables of multiple types with a speed ranging from 10 Mbit/s to 10 Gbit/s. It is used in LAN in general.

As described above, the principles, protocols, and application scenarios of E1 and T1 are different. In addition, E1 or other interface cards equipped with four or eight interfaces use RJ45 interfaces but do not use the Ethernet.

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