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The Linksys WRT54G Wi-Fi series is a series of Wi-Fi–capable residential gateways marketed by Linksys, a subsidiary of Cisco, from 2003 until acquired by Belkin in 2013. A residential gateway connects a local area network (such as a home network) to a wide area network (such as the Internet).
Models in this series use one of various 32-bit MIPS processors.[1] All WRT54G models support Fast Ethernet for wired data links, and 802.11b/g for wireless data links.
Hardware and revisions
WRT54G
-
WRT54G version 2.0 with upgraded antennas
The original WRT54G was first released in December 2002. It has a 4+1 port network switch (the Internet/WAN port is part of the same internal network switch, but on a different VLAN). The devices have two removable antennas connected through Reverse Polarity TNC connectors. The WRT54GC router is an exception and has an internal antenna with optional external antenna.
As a cost-cutting measure, as well as to satisfy FCC rules that prohibit fitting external antennas with higher gain, the design of the latest version of the WRT54G no longer has detachable antennas or TNC connectors. Instead, version 8 routers simply route thin wires into antenna 'shells' eliminating the connector. As a result, Linksys HGA7T and similar external antennas are no longer compatible with this model.
Until version 5,[2] WRT54G shipped with Linux-based firmware.
| Version | CPU | RAM | Flash memory | S/N Prefix[3] | Power | Notes |
|---|---|---|---|---|---|---|
| 1.0 | Broadcom BCM4702 @ 125 MHz | 16 MB | 4 MB | CDF0 CDF1 |
5 V 2 A positive tip |
20 front panel LEDs (including link/activity, collision detection and speed rating indicators for each Fast Ethernet port). Wireless capability was provided by a Mini PCI card attached to the router motherboard |
| 1.1 | Broadcom BCM4710 @ 125 MHz | 16 MB | 4 MB | CDF2 CDF3 |
12 V 1 A positive tip |
Front panel LEDs reduced to eight (one link/activity LED per port, plus one each for power, wireless, DMZ and WAN/Internet connectivity). Wireless chipset is integrated onto motherboard.
Note: some of the routers have BCM4702 CPU[4] |
| 2.0 | Broadcom BCM4712 @ 200 MHz | 16 MB | 4 MB | CDF5 | Same as 1.1 with a CPU upgrade and greater wireless transmitter integration (fewer transmitter parts). Some of these have 32 MB of RAM but are locked to 16 MB in the firmware (can be unlocked to use all RAM — see [5] (general info) and [6] (for an XB card) and [7] (for an XH card)). | |
| 2.1 | Broadcom BCM4712 @ 216 MHz | 16 MB | 4 MB | CDF6 | Same physical appearance as 1.1 and 2.0 models. Some of these models have 32 MB of RAM installed but have been locked to 16 MB by the manufacturer. Some models have two 16 MB MIRA P2V28S40BTP memory chips. | |
| 2.2 | Broadcom BCM4712 @ 216 MHz | 16 MB | 4 MB | CDF7 | Same physical appearance as 1.1 and 2.0 models. Switching chipsets from ADMtek 6996L to Broadcom BCM5325EKQM. Some of these models have 32 MB of RAM installed but have been locked to 16 MB by the manufacturer. Some models have 16 MB Hynix HY5DU281622ET-J memory chips. | |
| 3.0 | Broadcom BCM4712 @ 216 MHz | 16 MB | 4 MB | CDF8 | Identical to 1.1 and later models, except for the CPU speed and an undocumented switch behind left front panel intended for use with a feature called "SecureEasySetup". | |
| 3.1 | Broadcom BCM4712 @ 216 MHz | 16 MB | 4 MB | CDF9 | The Version 3.1 hardware is essentially the same as the Version 3.0 hardware. Adds "SecureEasySetup" button. | |
| 4.0 | Broadcom BCM5352 @ 200 MHz | 16 MB | 4 MB | CDFA | Switched to new SoC | |
| 5.0 | Broadcom BCM5352 @ 200 MHz | 8 MB | 2 MB | CDFB | 12 V 0.5 A positive tip |
Switched to VxWorks OS and reduced flash memory and RAM; not compatible with most third-party firmware, although the "VxWorks killer" utility allows some third-party open source firmware to be loaded. Since less physical RAM is available in this and future models, the third-party firmware (popular open source projects) were modified into special "micro" versions. |
| 5.1 | Broadcom BCM5352 @ 200 MHz | 8 MB | 2 MB | CDFC | ||
| 5.2 | Broadcom BCM5352 @ 200 MHz | 8 MB | 2 MB | CDFB | ||
| 6.0 | Broadcom BCM5352 @ 200 MHz | 8 MB | 2 MB | CDFD | Also based on VxWorks, will only run DD-WRT micro. VxWorks killer must be used prior to flashing, otherwise, it will refuse to flash. Due to low RAM, users may encounter issues when running P2P software. | |
| 7.0 | Atheros AR2317 @ 240 MHz | 8 MB | 2 MB | CDFE | Switched to Atheros SoC. This is the only version of the WRT54G that does not support third-party firmware at all. | |
| 7.2 | Broadcom BCM5354 @ 240 MHz | 8 MB | 2 MB | CDFK | Switched back to Broadcom based SoC; Samsung K4S641632K-UC75 (RAM); Samsung K801716UBC PI07 (flash). Micro versions of third-party firmware are supported again. | |
| 8.0 | Broadcom BCM5354 @ 240 MHz | 8 MB | 2 MB | CDFF CDFG |
Some units come with 16 MB of RAM. VxWorks killer works. Antennas cannot be removed. | |
| 8.1 | Broadcom BCM5354 @ 240 MHz | 8 MB | 2 MB | MDF0 | FCC ID: Q87-WRT54GV81. Operating system is Linux, no need for VxWorks killer.[8] Antennas cannot be removed. | |
| 8.2 | Broadcom BCM5354 @ 240 MHz | 8 MB | 2 MB | CDFJ | FCC ID: Q87-WRT54GV82. VxWorks killer does work, dd-wrt is supported, 2 MB of flash memory can be limiting.[9] Antennas cannot be removed. |
WRT54GS
-
Linksys WRT54GS version 7.2
The WRT54GS is nearly identical to the WRT54G except for additional RAM, flash memory, and SpeedBooster software. Versions 1 to 3 of this router have 8 MB of flash memory. Since most third parties' firmware only use up to 4 MB flash, a JFFS2-based read/write filesystem can be created and used on the remaining 4 MB free flash. This allows for greater flexibility of configurations and scripting, enabling this small router to both load-balance multiple ADSL lines (multi-homed) or to be run as a hardware layer-2 load balancer (with appropriate third party firmware).[10]
| Version | CPU | RAM | Flash memory | S/N Prefix | Notes |
|---|---|---|---|---|---|
| 1.0 | Broadcom BCM4712 @ 200 MHz | 32 MB | 8 MB | CGN0 CGN1 |
ADMtek 6996L switch. Added SpeedBooster technology (Broadcom Afterburner technology), claims to boost the throughput of 802.11g by 30% (for maximum boost needs SpeedBooster technology on the other side, but will boost standard 802.11g as well). Has LEDs for Power, DMZ, WLAN, Internet, and 1–4 Ports. |
| 1.1 | Broadcom BCM4712 @ 200 MHz | 32 MB | 8 MB | CGN2 | Switched to Broadcom BCM4712 SoC and BCM5325E switch. |
| 2.0 | Broadcom BCM4712 @ 216 MHz | 32 MB | 8 MB | CGN3 | 10 LED Front Panel (two new ones behind Cisco logo button). Also capable of SecureEasySetup, but use of the logo button and lighting of the new LEDs behind it requires firmware upgrade. SoC chip REV1 or REV 2. The flash chip on this unit is Intel TE28F640. |
| 2.1 | Broadcom BCM4712 @ 216 MHz | 32 MB | 8 MB | CGN4 | Radio chip is changed from BCM2050 to BCM2050KML. |
| 3.0 | Broadcom BCM5352 @ 200 MHz | 32 MB | 8 MB | CGN5 | Switched to newer Broadcom SoC |
| 4.0 | Broadcom BCM5352 @ 200 MHz | 16 MB | 4 MB | CGN6 | Reduced RAM & Flash (a very rare few have 32 MB/8 MB) |
| 5.0 | Broadcom BCM5352 @ 200 MHz | 16 MB | 2 MB | CGN7 | Uses VxWorks OS and reduced Flash Memory; not compatible with most third-party firmware, although the "VxWorks killer" utility allows some third-party open source firmware to be loaded on this and future versions.[11] |
| 5.1 | Broadcom BCM5352 @ 200 MHz | 16 MB | 2 MB | CGN8 | |
| 6.0 | Broadcom BCM5352 @ 200 MHz | 16 MB | 2 MB | CGN9 | |
| 7.0 | Broadcom BCM5354 @ 240 MHz | 16 MB | 2 MB | CGNA CGNB CGNC |
Switched to newer Broadcom SoC. Newest[when?] VxWorks killer works. Antennas can be removed. CGNB and CGNC antennas can be removed. |
| 7.2 | Broadcom BCM5354 @ 240 MHz | 16 MB | 2 MB | CGNE | FCC ID: Q87-WRT54GSV72. Some antennas can be removed. Some refurbished ones have EN29LV160A 16 Mb (2 MiB)[12] Flash and IS42S16800A or K4S281632IUC75 128 Mb (16MiB) RAM |
WRT54GL
-
Linksys WRT54GL
Outside view, front -
Linksys WRT54GL version 1.1
Circuit board and internals -
Linksys WRT54GL version 1.1
Close-up of the circuit board
Linksys released the WRT54GL (the best-selling router of all time[13][14][15]) in 2005 to support third-party firmware based on Linux, after the original WRT54G line was switched from Linux to VxWorks, starting with version 5. The WRT54GL is technically a reissue of the version 4 WRT54G. Cisco was sued by the FSF for copyright infringement, but the case was settled.[16]
| Version | CPU | RAM | Flash memory | S/N Prefix | Power | Notes |
|---|---|---|---|---|---|---|
| 1.0 | Broadcom BCM5352 @ 200 MHz | 16 MB | 4 MB | CL7A | 12 V 1 A positive tip |
New model line, released after the version 5 WRT54G, which returns to a Linux-based OS as opposed to the VxWorks firmware. SpeedBooster is not enabled in stock firmware, however third-party firmware will enable the feature. The hardware is essentially the same as the WRT54G version 4.0. One alteration is that the internal numbering scheme of the 4-port switch changed in this model, from 1 2 3 4, to 3 2 1 0. |
| 1.1 | Broadcom BCM5352 @ 200 MHz | 16 MB | 4 MB | CL7B CL7C CF7C | Detachable antennas. As of August 2009, this version was shipping with firmware revision 4.30.11. This pre-loaded firmware allows the user to upload a 4 MB firmware image, whereas the pre-loaded firmware on version 1.0 limited the image to 3 MB. Firmware version 4.30.18 is now available for both hardware versions. Fully supported by Tomato, OpenWrt, and DD-WRT. |
WRTSL54GS
WRTSL54GS is similar to the WRT54GS while adding additional firmware features and a USB 2.0 port (referred to as StorageLink) which can be used for a USB hard disk or flash drive.[17]
Unlike other models, the WRTSL54GS has only a single 1.5 dBi antenna, and it is not removable.
| Version | CPU speed | RAM | Flash memory | S/N Prefix | Notes |
|---|---|---|---|---|---|
| 1.0 | Broadcom BCM4704 @ 264 MHz | 32 MB | 8 MB | CJK0 | Released after the WRT54GS and WRT54GL. Uses Linux-based OS. Includes SpeedBooster support, additional firmware features, and an external USB 2.0 port (StorageLink) for network storage. Uses 8 MB of Intel TE28F640 flash with a Broadcom BCM4704 SoC and ADMtek Ethernet switch. |
| 1.1 | Broadcom BCM4704 @ 264 MHz | 32 MB | 8 MB | CJK11 | Change from SoC rev 8 to rev 9 (unconfirmed) |
WRT54GX
-
Linksys WRT54GX version 2
WRT54GX comes with SRX (Speed and Range eXpansion), which uses "True MIMO" technology. It has three antennas and was once marketed as a "Pre-N" router, with eight times the speed and three times the range over standard 802.11g routers.[citation needed]
| Version | CPU speed | RAM | Flash memory | S/N Prefix | Notes |
|---|---|---|---|---|---|
| 1.0 | Broadcom BCM4704 @ 266 MHz[18] | 16 MB | 4 MB | KBG5? | Wireless-G Broadband Router with SRX. |
| 2.0 | Realtek RTL8651B @ 200 MHz | 32 MB | 8 MB | KIO1? | Wireless-G Broadband Router with SRX. |
WRT54GP2 and WRTP54G
WRT54GP2 has 1 or 2 antennas, and a built-in analog telephony adapter (ATA) with 2 phone lines, but only 3 network ports. "Vonage" WRTP54G has 1 antenna, 2 phone lines, 4 network ports — Same S/N Prefix
| Version | Locked to | RAM | Flash memory | S/N Prefix | Notes |
|---|---|---|---|---|---|
| EA | Engin | 32 MB | 8 MB | CJJ0
CGZ0 on WRT54GP2 |
Wireless-G Broadband Router with 2 Phone Ports. Uses the Sipura Chipset |
WRT54GX2
WRT54GX2 has 2 antennas, and was advertised to have up to 6 times the speed and 2 times the range over standard 802.11g routers. Chipset Realtek. It is not compatible with DD-WRT.[19]
WRT54GX4
WRT54GX4 has 3 moveable antennas, and is advertised to have 10 times the speed and 3 times the range of standard 802.11g routers. WRT54GX4-EU: chipset Realtek RTL8651B, radio chipset Airgo AGN303BB, flash S29GL064M90TFIR4. It does not appear to be compatible with DD-WRT.[19]
WRT51AB
WRT series with 802.11a support. (First Generation)