AR157W

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 Hardware Description

This document describes hardware components of the AR, including the cabinet, chassis, power supply facilities, fan modules, cards, cables, and pluggable modules for interfaces. You can find useful information about AR hardware components from this document.

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AR157W

Version Mapping

Table 4-138 lists the mapping between the AR157W router and software versions.

Table 4-138 Matching between AR157W router and software versions

Router Model	Software Version
AR157W	V200R003C00 and later versions

Appearance and Structure

Figure 4-43 shows the appearance of the AR157W router.

Figure 4-43 AR157W appearance
Click to enlarge

1	USB interface (host)	2	Two Wi-Fi antennas
3	CON/AUX interface NOTE: The AR157W does not support AUX login.	4	LAN interfaces: four FE electrical interfaces NOTE: FE3 is a management interface and is used to upgrade the router. LAN interface FE0 can be configured as a WAN interface. V200R007C00 and later versions: all FE LAN interfaces can be configured as WAN interfaces.
5	RESET button NOTE: This button is used to reset the router. To restore the factory settings, hold down the button for at least 5 seconds. To reset the system, press the button for less than 5 seconds. Resetting the router will interrupt services. Exercise caution when deciding to press this button.	6	Power jack NOTE: The router uses a 24 W integrated power adapter.
7	Jack for power cable locking strap NOTE: Insert a power cable locking strap in this jack to secure the power cable.	8	WAN interface: ADSL-A/M interface NOTE: This interface supports the dying gasp function.
9	Two Wi-Fi antenna interfaces	10	Product model silkscreen
11	Ground point NOTE: Reliably ground the router by connecting a ground cable to the ground point to protect the router against lightning and interference.	-	-

Indicator Description

Figure 4-44 is a quick reference table for indicators of the AR157W router.

Figure 4-44 Indicators on the AR157W panel
Click to enlarge

Number	Indicator	Color	Description
1	PWR	Green	Steady on: The system power supply is normal. Off: The system power is off.
2	SYS	Red and green	Slow blinking green: The system is running properly. Fast blinking green: The system is being powered on or restarting.
			Steady red: A fault that affects services has occurred. The fault cannot be rectified automatically and requires manual intervention.
			Off: The system software is not running or is resetting.
3	USB	Red and green	Steady green: The system has been upgraded or configured using a USB flash drive.
			Blinking green: The system is being upgraded or configured using a USB flash drive.
			Steady red: The system fails to be upgraded or configured using a USB flash drive.
			Off: No USB flash drive is connected, the USB interface has failed, or the indicator has failed.
4	PPP	Green	Steady on: A PPP connection has been set up. Off: No PPP connection is set up.
5	VPN	Green	Steady on: The IPSec service is running normally. Off: The IPSec service is unavailable.
6	WAN: LINK	Green	Steady on: A link has been established on the WAN interface. Off: No link is established on the WAN interface.
6	WAN: ACT	Green	Blinking: Data is being transmitted or received on the WAN interface. Off: No data is transmitted or received on the WAN interface.
7	WLAN	Green	Blinking: The WLAN link is transmitting data. The blinking frequency changes with the traffic transmission rate on the link. Off: The WLAN link is shut down.
8	LAN/WAN (FE0)	Green	Steady on: A link has been established on the corresponding LAN/WAN interface.
			Blinking: Data is being transmitted or on the corresponding LAN/WAN interface.
			Off: No link is established on the corresponding LAN/WAN interface.
9	LAN (FE1-FE3)	Green	Steady on: A link is connected on the LAN interface.
			Blinking: The LAN interface is transmitting or receiving data.
			Off: No link is connected on the LAN interface.

Interface Description

CON/AUX Interface

The console interface of a router can connect to an operation terminal for onsite configuration. An AUX interface can connect to a remote management center through a modem for remote configuration. Table 4-139 lists the CON/AUX interface attributes.

Table 4-139 CON/AUX interface attributes

Attribute	Description
Connector type	RJ45
Standards compliance	RS232
Working mode	Full-duplex Universal Asynchronous Receiver/Transmitter (UART)
Data equipment type	Data circuit terminal equipment (DCE) AUX interface: data terminal equipment (DTE)
Cable type	Console Cable

FE Electrical Interface

An FE electrical interface (10/100 Mbit/s auto-sensing) transmits and receives Ethernet services at 10 Mbit/s or 100 Mbit/s. Table 4-140 lists attributes of an FE electrical interface.

Table 4-140 FE electrical interface attributes

Attribute	Description
Connector type	RJ45
Interface attribute	MDI/MDIX NOTE: MDI stands for medium dependent interface, an Ethernet interface connection mode. Ethernet interfaces of most network adapters are MDI interfaces. MDIX stands for medium dependent interface crossover, a version of MDI. MDIX interfaces are usually used on hubs or LAN switches.
Standards compliance	PoE-capable FE electrical interface: IEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3af, and IEEE802.3at PoE-incapable FE electrical interface: IEEE802.3, IEEE802.3u, and IEEE802.3ab
Frame format	Ethernet_II, Ethernet_SAP, Ethernet_SNAP
Network protocol	IP
Cable type	Ethernet Cable

USB Interface (Host)

A USB interface provides up to 480 Mbit/s upload and download rates. Table 4-141 lists attributes of a USB interface.

Table 4-141 USB interface attributes

Attribute	Description
Connector type	Type A
Standards compliance	USB2.0
Working mode	Host

Wi-Fi Antenna Interface

A Wi-Fi antenna interface connects to a Wi-Fi antenna to transmit and receive data. Table 4-142 lists attributes of a Wi-Fi antenna interface.

Table 4-142 Wi-Fi antenna interface attributes

Attribute	Description
Connector type	RP-SMA-K (screw threads outside and a pin inside)
Standards compliance	802.11b/g/n
Frequency band supported	2.4 GHz
Rate	300 Mbit/s
MIMO mode (Tx x Rx)	2x2
Gain	2.15 dBi
Services provided	Layer 2/3 wireless access Wireless data encryption WLAN security
Cable type	Wi-Fi Whip Antenna

ADSL-A/M Interface

An ADSL-A/M interface transmits service data from a LAN to an upstream device at a high speed. Table 4-143 lists attributes of an ADSL-A/M interface.

Table 4-143 ADSL-A/M interface attributes

Attribute	Description
Connector type	RJ11
Standards compliance	ITU-T G.992.1 G.DMT ANSI T1.413 Issue 2 ITU-T G.992.3 ITU-T G.992.5
Rate	ADSL full rate mode (ITU-T G.992.1 G.DMT): downlink rate of 8 Mbit/s and uplink rate of 1 Mbit/s ADSL2 full rate mode (ITU-T G.992.3): downlink rate of 12 Mbit/s and uplink rate of 1 Mbit/s ADSL2+ full rate mode (ITU-T G.992.5): downlink rate of 24 Mbit/s and uplink rate of 1 Mbit/s ADSL2 Annex M mode: a downlink rate of 12 Mbit/s and an uplink rate of 2 Mbit/s ADSL2+ Annex M mode: a downlink rate of 24 Mbit/s and uplink rate of 2 Mbit/s T1.413 mode: a downlink rate of 8 Mbit/s and an uplink rate of 1 Mbit/s
Cable type	Universal Telephone Cable

Technical Specifications

Table 4-144 lists the technical specifications of the AR157W router.

Table 4-144 AR157W router technical specifications

Item	Specification
System parameters
Processor	Dual-core, 533 MHz
Memory	512 MB
Flash	512 MB
Micro SD card (sd1 by default)	None
Hard disk	Not supported
Dimensions and weight
Dimensions (H x W x D)	Without rack-mounting bracket installed: 44.0 mm x 300.0 mm x 216.4 mm (1.73 in. x 11.81 in. x 8.52 in.) With rack-mounting brackets installed: 44.0 mm x 482.6 mm x 216.4 mm (1.73 in. x 19.00 in. x 8.52 in.)
Weight	2.8 kg (6.17 lb)
Power
Rated input voltage range (AC)	100 V to 240 V, 50 Hz/60 Hz
Maximum input voltage range (AC)	90 V AC to 264 V AC, 47 Hz to 63 Hz
Maximum output current	2 A
Maximum output power	24 W
RPS	Not supported
PoE	Not supported
Power consumption
Maximum power consumption	16.7 W
Heat dissipation
Fan	None
Airflow (facing the front panel)	None
Interface density
Management interfaces	1 (RJ45)
CON/AUX interfaces	1 (RJ45)
USB 2.0	1
Service interfaces (standard configuration)	WAN interface: one ADSL-A/M interface LAN interfaces: four FE electrical interfaces, in which FE0 LAN interface can be switched to a WAN interface, and two Wi-Fi antenna interfaces.
Extended slots	Not supported
Environment
Operating temperature	0°C to 45°C (32°F to 113°F) NOTE: When the altitude is between 1800 m and 5000 m, the operating temperature reduces by 1°C every time the altitude increases 220 m.
Storage temperature	-40°C to +70°C
Operating relative humidity	5% to 95%, noncondensing
Operating altitude	< 5000 m (16404.2 ft.)
Part number	02354247

Version Mapping
Appearance and Structure
Indicator Description
Interface Description
Technical Specifications

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Updated: 2023-08-08

Document ID: EDOC1000009848

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