How to extend the E1 cables used by AR routers

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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.

Other related questions:
How to connect the E1 interface of an AR router to other devices using cables
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.

What E1 cables does AR1200 use
E1 cables used by AR routers and the line orders of the cables are described as follows: E1 cables include DB9-BNC cables and RJ45-BNC cables. The impedance of the cables can be 75 ohms, 120 ohms, and 100 ohms. Note: You are not advised to make E1 cables by yourself. 1. DB9-BNC cables: (apply to E1 cards with one interface or two interfaces) DB9 pin1---Rx+Signal---BNC1 core wire (Rx) DB9 pin2---Rx-Signal---BNC1 insulated wire (GND) DB9 pin6---Tx+Signal---BNC1 core wire (Tx) DB9 pin7---Tx-Signal---BNC1 insulated wire (GND) 2. RJ45-BNC cables: (apply to E1 cards with four and eight interfaces) RJ45 pin1---Rx-Signal---BNC1 core wire (Rx) RJ45 pin2---Rx+Signal---BNC1 insulated wire (GND) RJ45 pin4---Tx-Signal---BNC1 core wire (Tx) RJ45 pin5---Tx+Signal---BNC1 insulated wire (GND) 3. Pin definition: Assume that a DB9 connector is put in a method that the wider end is at the top, Pin 1 to Pin 9 of the connector are defined in a sequence from left to right and from top to bottom. Assume that an RJ45 connector is laid flat, Pin 1 to Pin 8 of the RJ45 connector are defined in a sequence from left to right when you face to the front of the connector.

Can I use the network port of an HD-VI to DVI+RJ45 cable to extend the control cable of the VPC600?
An HD-VI to DVI+RJ45 cable is a conversion cable used on an endpoint. To extend the control cable of a camera, use a VISC to RJ45 conversion cable through the COM IN port.

How do I extend the control cable of a camera?
If the control cable of a camera is too short and needs to be extended, you can use either of the following methods to extend the control cable: Method 1: Manually make serial cables. Method 2: Use a network cable extender to connect the serial port and an extended network cable.

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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