Describe the synchronous and asynchronous cables used by AR routers

30

AR routers support the following three types of 8AS cables:

1. Straight-through cables, which apply to financial scenarios where dumb terminals are used
X1 Signal Direction X2 (Female connector)
1 DCD �? 1
2 DTR �? 2
3 DSR �? 3
4 GND - 4
5 RXD �? 5
6 TXD �? 6
7 CTS �? 7
8 RTS �? 8
2. Asynchronous serial cables, which apply to common scenarios
X1 (Male connector) Signal Direction X2 (Female connector)
1 DCD �? Blue
2 DTR �? Orange
3 DSR �? White and brown
4 GND - White and blue
5 RXD �? Green
6 TXD �? White and green
7 CTS �? Brown
3. Adapter cables, which are used together with the preceding two types of cables and apply to telecommunication or common scenarios
X1 (Male connector) Signal Direction X2 (Female connector)
1 DCD �? Blue
2 DTR �? Orange
3 DSR �? White and brown
4 GND - White and blue
5 RXD �? Green
6 TXD �? White and green
7 CTS �? Brown
8 RTS �? White and orange
4. Self-made cables, which are used in serial port server scenarios
X1 Signal Direction X2 (Female connector)
1 DCD �? 4
2 DTR �? 7
3 DSR �? 2
4 GND - 5
5 RXD �? 3
6 TXD �? 6
7 CTS �? 1
8 RTS �? 8

Other related questions:
Description of synchronous/asynchronous serial interfaces of AR routers
The serial interface is one of the most commonly used WAN interfaces. A serial interface can work in synchronous mode or asynchronous mode. Therefore it is also called the synchronous/asynchronous serial interface. Devices support the following synchronous serial interfaces: - Synchronous interfaces generated from synchronous/asynchronous serial interfaces that work in synchronous mode, which are named as Serial Devices support the following asynchronous serial interface: - Asynchronous interfaces generated from synchronous/asynchronous serial interfaces that work in asynchronous mode, which are named as Serial - Dedicated asynchronous serial interfaces which are named as Async 1. Serial interfaces have the following features in synchronous mode: - Serial interfaces can work in data terminal equipment (DTE) mode or data circuit-terminating equipment (DCE) mode. Devices on which DTE cables are connected to the serial interface are named as DTE devices. Devices on which DCE cables are connected to the serial interface are named as DCE devices. In general, devices are used as DTE devices and receive the clock provided by DCE devices. - Serial interfaces support the following link-layer protocols: PPP, X.25, LAPB, FR, and HDLC. - Serial interfaces support protocols in the IP network layer. 2. In asynchronous mode, serial interfaces can work in protocol mode or stream mode. ? Protocol mode - In protocol mode, after the physical link of a serial interface is established, the serial interface uses the existing link-layer protocols to configure parameters and establish the link. - In protocol mode, the type of link-layer protocol is PPP. - In protocol mode, serial interfaces support protocols in the IP network layer. ? Stream mode - In stream mode, when the devices connected to both ends of a serial interface begin to interact with each other, a device can send configuration information to the peer device to configure the physical-layer parameters of the peer device and establish the link. - In stream mode, serial interfaces do not support protocols in the IP network layer or link layer.

Describe AR series routers
AR series enterprise router (AR for short) is a new-generation service routing gateway that integrates routing, switching, radio access, voice, and security functions. AR routers include the following series: AR120, AR150, AR160, AR200, AR500, AR510, AR1200, AR2200, AR3200, and AR3600. For details about models included in each series, see the following URLs: Hardware Query Too, or Hardware description.

Synchronous systems and asynchronous systems
In a synchronous system, all service signals from service boards to cross-connect boards are synchronous (same frequencies and aligned frame headers), and both time-division and space-division cross-connections can be implemented inside cross-connect chips. In an asynchronous system, service signals from service boards to cross-connect boards are asynchronous (different frequencies and unaligned frame headers). Services are independent of each other, and only space-division cross-connection can be implemented inside cross-connect chips. The OSN 8800 is a synchronous system, while the OSN 6800 is an asynchronous system.

Restrictions and precautions of the AR router used as the WLAN AC
The restrictions and precautions of the AR router used as the WLAN AC are as follows: Precautions for parameter settings: 1. In tunnel forwarding mode, the mVLAN and service VLAN must be different. 2. The device used as the AC only supports direct forwarding of service packets. It does not support tunnel forwarding. License support: The WLAN AC function is used with a license and is unavailable by default. To use the AC function, apply for and purchase the following license from the agent according to the device model: 1. AR150&160&200 series routers: AR150&160&200 value-added service package for data services and AR150&160&200 wireless controller license 2. AR1200 series routers: AR1200 value-added service package for data services and AR1200 wireless controller license 3. AR2200 series routers: AR2200 value-added service package for data services and AR2200 wireless controller license 4. AR3200 series routers: AR3200 value-added service package for data services and AR3200 wireless controller license To use WLAN-AC functions, you must load both value-added service package for data services and wireless controller license. A license is used according to the value-added service package loaded on the device; therefore, load a value-added service package before loading the corresponding license. The mapping between the AC and AP is as follows: Read the product documentation of the required version. Huawei APs must be used.

Introduction to WLAN security of AR routers
WLAN security is as follows: User access security: Link authentication, access authentication, and data encryption are used to ensure validity and security of user access on wireless networks. Service security: This feature protects service data of authorized users from being intercepted by unauthorized users during transmission. For details, see WLAN Security Configuration > Overview .

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top