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CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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How Do I Handle a Service Exception on an E1-F Link?

How Do I Handle a Service Exception on an E1-F Link?

If a service exception occurs on an E1-F link, the most possible cause is that the local and remote interfaces are configured with different CRC modes. By default, AR routers use 16-bit CRC mode. Devices from many other vendors may use 32-bit CRC mode. As a result, the local and remote devices cannot communicate.

Run the crc { 16 | 32 | none } command to configure the local interface to work in the same CRC mode as the remote interface. In addition, ensure that both the local and remote devices are grounded using ground cables.

Ground points on AR routers have the same appearance. The ground point on the AR151 is taken as an example, as shown in Figure 8-3.

Figure 8-3  Ground point on the AR151

The more service exception cause please see A Connected E1 Interface Cannot Go Up.

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Updated: 2019-03-06

Document ID: EDOC1100069331

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