How to connect AR routers to other devices using V.35 cables

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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.

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.

How to connect the AR router to the HyperTerminal
When you log in to the device through the console port, you need to install the terminal access software on the local PC (such as SecureCRT software) and set parameters of the terminal simulation software.

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.

The reason why a device directly connected to an AR router cannot be pinged or the IP address of the device that is obtained over DHCP is returned slowly
In Layer 2 networks, STP can solve network loop problems. By default, this function is enabled on an AR router. If the AR router is used as a user access device (the WAN interface of the router is connected to the Internet, and the LAN interface is connected to an intranet), there is no risk of loop generally. In this case, you are advised to run the stp disable command to disable STP and avoid interface blockage due to the enabled STP function or network flapping due to STP convergence. For example, a device directly connected to an AR router cannot be pinged or the IP address of the device that is obtained over DHCP is returned slowly.

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