How to connect the E1 interface of an AR router to other devices using cables

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Methods of connecting the E1 interface of an AR router to other devices using cables are described as follows:

Devices of operators provide the BNC connector in general while AR routers provide the DB9 female connector (cards with 1 interface or 2 interfaces) or the RJ45 connector (cards with 4 or 8 interfaces). The connection methods are as follows:
- BNC connectors of operators' devices -- connectors of coaxial cables -- (BNC connector on the customer end -- E1 cables -- DB9 male connectors) -- DB9 female connectors of routers
- BNC connectors of operators' devices -- connectors of coaxial cables -- (BNC connector on the customer end -- E1 cables -- RJ45 connectors) -- RJ45 connectors of routers

Cables with BNC and DB9/RJ45 connectors are used.

Other related questions:
How to connect AR routers to other devices using V.35 cables
1SA/2SA interface cards (1/2-interface synchronous/asynchronous WAN interface cards) and 8SA interface cards (8-interface synchronous/asynchronous WAN interface cards) support SA cables. Before selecting SA cables, confirm the type of the peer device (such as synchronous/asynchronous mode and DTE/DCE mode) and the signal standard, baud rate, and synchronization clock required by the access device. V.35 DTE cables are connected as follows: ? Cables with one connector (DB28) are connected to SA cards. ? Cables with two connecters are connected to different devices as follows based on the feature of lines: - If DDN lines are used in WAN, connect the cables to the interfaces of CSU/DSU. - If dial-up lines are used in WAN, connect the cables to the serial interfaces of analog modems. V.35 DCE cables are connected as follows: ? Cables with one connector (DB28) are connected to SA cards. ? Cables with two connecters are connected to different devices as follows based on the feature of lines: - If DDN lines are used in WAN, connect the cables to the interfaces of CSU/DSU. - If dial-up lines are used in WAN, connect the cables to the serial interfaces of analog modems.

How to extend the E1 cables used by AR routers
The length of a 75-ohm DB9-BNC E1 cable is 3 m by default. If the cable is not long enough for connection, you can use 75-ohm trunk cables (15 m) to extend the cable.

How to connect the U1900 E1 trunk cables?
Each E1 link consists of two E1 lines, one for receiving and the other for transmitting data. Connect the Tx and Rx ends of the E1 cable respectively to the Rx and Tx ends of the peer E1 cable.

Can AR2240 use Cisco V35 serial port cables
Console cables follow the same standard and can be replaced in general. However, the appearance and implementation method of serial port cables may vary with manufacturers. Use E1 serial ports cables of corresponding manufacturers to ensure stable data transmission.

How to configure the E1-IMA interface of an AR router
The configuration method of the E1-IMA interface of an AR router is described as follows: You can configure the attributes of the E1-IMA interface if you want to use a single E1-IMA link to bear ATM cells. system-view [Huawei] interface atm 2/0/0 //Enter the view of the E1-IMA interface. [Huawei-Atm2/0/0] clock slave //Set the clock mode to master or slave. The default clock mode is slave [Huawei-Atm2/0/0] frame-format no-crc4-adm//Set the frame format of the interface to CRC4-ADM or No-CRC4-ADM. The default frame format is NO-CRC4 ADM [Huawei-Atm2/0/0] scramble //Enable the load scrambling function of the E1-IMA interface [Huawei-Atm2/0/0] loopback { local | payload | remote } //Configure the loopback method of the E1-IMA interface. The loopback function is disabled by default. The local method indicates that the loopback is performed in the output direction of the device to test whether the local device works properly. The payload method indicates that the loopback is performed on the valid payload in the output direction of the device. The TS0 is not included in the loopback in general. The remote method indicates that the loopback is performed on the input data stream sent by the peer device to test whether the links between the test devices work properly. Run the display interface atm [ interface-number ] command to check the configuration and status of the ATM interface.

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