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LINKSYS WRT54GL

Standards	IEEE 802.3/3u, IEEE 802.11b/g
Device Management	Web-Based/SSH
Security	Stateful Packet Inspection (SPI) Firewall, Internet Policy Wi-Fi Protected Access (WPA), WEP, Wireless MAC Filtering
WPA/WPA2	WPA
Ports	1 x 10/100M WAN; 4 x 10/100M LAN
LEDs	Power, DMZ, WLAN, LAN (1-4), Internet
Buttons	Reset, SecureEasySetup
Data Rates	up to 54Mbps
Antenna	External Antenna
Channels	11 Channels (US, Canada) 13 Channels (Europe)
Transmitted Power	18 dBm
Interface	Ethernet Port
VPN support	IPSec, L2TP, and PPTP VPN pass-through
Power Input	External, 12V DC, 0.5A
Wireless Adapter included	No
Dimensions	7.3" x 1.9" x 7.9"
Weight	17 oz.
Temperature	0 to 40°C
Humidity	10% to 85%, Non-Condensing
These specifications are based apon the standard linksys firmware

The WRT54GL has two RP-TNC female connectors on the rear where an external antenna can be connected.
Usually one buys a TNC to NType-male cable to add on an external antenna

RouterBoard - RB112

** RECOMMENDED BUY **

CPU:	MIPS32 4Kc, 175MHZ Embedded
Memory:	16MB SDRAM
Data Storage:	64MB onboard NAND memory chip
Boot Loader:	RouterBOOT, 1Mbit Flash chip
Ethernet Ports:	one 10/100 MBit/s Fast Ethernet port supporting Auto MDI/X
MiniPCI Slot:	Two mini-PCI Type IIIA/IIIB slots
Serial Port:	One DB9 RS232C asynchronous serial port
LEDs:	Power, 2 LED pairs for MiniPCI slots, 1 user LED
Power Options:	11..60V DC - power jack or IEEE802.3af Power over Ethernet (12V / 48V DC, except power over datalines)
Power Out:	Two 3V DC power output headers (only one populated by default), maximal output current - 500mA total
Power Consumption:	3-4W without extension cards. Maximum 10W
Dimensions:	140mm x 85mm (5.51in x 3.35in)
Temperature:	Operational: -20°C to +70°C (-4°F to 158°F)
Supported OS:	RouterOS

The RB112 has two mini-PCI slots, which means you can put two wifi radios (See below) in there.

RouterBoard RB532

RB532

RB532 with RB502 Riser

CPU :	MIPS 32 4Kc based 266MHz (BIOS adjustable from 200 to 333 MHz; 400MHz processsor factory option) embedded processor
Memory :	32MB DDR onboard memory chip
Root loader :	RouterBOOT, 1Mbit Flash chip
Data storage :	128MB onboard NAND memory chip
CompactFlash :	type I/II slot (also supports IBM/Hitachi Microdrive)
Ethernet ports :	One IDT Korina 10/100 Mbit/s Fast Ethernet port supporting Auto-MDI/X Two VIA VT6105 10/100 Mbit/s Fast Ethernet ports supporting Auto-MDI/X
MiniPCI slot :	Two MiniPCI Type IIIA/IIIB slots
Daughterboard connector :	Present
Serial ports :	One DB9 RS232C asynchronous serial port
LEDs :	Power, 2 LED pairs for MiniPCI slots, 1 user LED
Watchdog :	IDT internal SoC hardware watchdog timer
Power options :	IEEE802.3af Power over Ethernet: 12V or 48V DC
Power :	jack/header 6..24V or 25..56V DC jumper selectable
Dimensions :	14.0 cm x 14.0 cm (5.51 in x 5.51 in)
Temperature :	Operational: -20°C to +70°C (-4°F to 158°F)
Humidity :	Operational: 70% relative humidity (non-condensing)
Currently :	supported OS RouterOS 2.9, Linux 2.4

From the base configuration of 3 Ethernet ports and 2 MiniPCI slots (for wireless cards) it can be extended by using daughterboards for four more MiniPCI slots, or even up to a total of 15 interfaces (9 Ethernet ports and 6 MiniPCI slots). A wide range of accepted input power means that you can connect to almost any direct current power source you already have on site. It also can be powered through an Ethernet port using Power-over-Ethernet technology (802.3af) or passive non-standard PoE.

Wistron Mini PCI CM9

Frequency Range :

Europe: 2.400 - 2.483GHz, 5.15~ 5.35Ghz, 5.47 ~ 5.725Ghz

Output Power :

802.11b 18 dBm
802.11g 18dBm @6Mbps, 15dBm @54Mbps
802.11a 17dBm @6Mbps, 13dBm @54Mbps

Power Consumption :

	802.11a	802.11b	802.11g
FTP Tx :	420mA	430mA	410mA
FTP Rx :	300mA	310mA	310mA
Standby mode:	260mA	250mA	270mA
Power saving mode:	50mA	50mA	50mA
RF Kill :	40mA	40mA	40mA

Operation System supported :

Windows® 98SE, ME, 2K, XP

Dimension :

59.75mm(L) * 44.60mm (W) * 5mm (H)

Security :

- 64-bit,128-bit, 152-bit WEP Encryption
- 802.1x Authentication
- AES-CCM & TKIP Encryption

Operation Mode :

Infrastructure & Ad-hoc mode

Transfer Data Rate :

802.11b/g: 11, 5.5, 2, 1 Mbps, auto-fallback, up to 54 Mbps
802.11g (Super mode): up to 108 Mbps
802.11a (Normal mode): 54, 48, 36, 24, 18, 12, 9, 6Mbps, auto-fallback
802.11a (Turbo mode): 108,96,72,48,36,24,18,12 Mbps, auto-fallback

Operation Temperature :

0 ~ 70°C

Storage Temperature

-20 ~ 80°C

Antenna connector :

2 x SMT Ultra-miniature coaxial connectors

The CM9 and most other Wifi radio cards come with 2 UFL connectors. In order to connect and external antenna you will need to use a UFL-NType Bulkhead pigtail(see below)

LMR-400

UFL - Ntype Female Bulkhead
(Pigtail)

N-Female Conn. LMR-400/LMR-195	N-Male Conn. LMR-400/LMR-195
RPSMA-Female Conn. LMR-195 Only	RPSMA-Male Conn. LMR-195 Only
RPTNC-Female Conn. LMR-195 Only	RPTNC-Female Conn. LMR-400/LMR-195
SMA-Female Conn. LMR-195 Only	SMA-Male Conn. LMR-195 Only
UFL Male & female LMR-100 Only