How to configure the T1 interface of an AR router

The configuration method of the T1 interface of an AR router is described as follows:
# You can configure a T1-F interface if you need a lower-speed T1 channel (such as 512 kbit/s) to transmit service data.
display device //Check whether the slot number of the E1T1-F interface card is correct and whether the interface card has been registered properly.
[Huawei] set workmode slot 0 e1t1-f t1-f //Set the work mode of the interface to T1. The default mode is e1-f. The configuration of work mode is not supported on 4-interface and 8-interface cards.
[Huawei] interface serial 1/0/0 //Enter the view of the interface. You can run the display interface brief command to check the information about the interface.
[Huawei-Serial1/0/0] ft1 timeslot-list 1-3,8,10 //Set the timeslots to be bundled into the interface and the rate of the interface. By default, all timeslots are bundled into an interface, which indicates the rate is 1536 kbit/s.
[Huawei-Serial1/0/0] ft1 clock slave //Set the clock mode to master, slave, or system. The default mode is slave.
[Huawei-Serial1/0/0] crc 16 //Set the CRC verification mode to CRC-16, CRC-32 or none by setting the value to 16, 32, or none. The default CRC verification mode is CRC-16.
[Huawei-Serial1/0/0] ft1 detect-rai //Configure whether the remote alarm indication (RAI) detection is enabled on the current interface. The detection is enabled by default.

Run the display ft1 serial interface-number command to check the basic configuration and alarms of the T1-F interface.
Run the display interface serial interface-number command to check the status and statistics of the T1-F interface.

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