Linksys BEFW11S4-V4 routers loses Internet connectivity

Over the past month or so, I purchased (and reluctantly returned)
three separate BEFW11S4-V4 units. They all suffered from the same
'show-stopper'
problem: Typically after just a few hours, the router would simultaneous
lose Internet-connectivity of all the client PCs out thru the cable-modem.
(Once the router went into this 'broken state', I could still ping between
all the clients on the local-network, and a new wireless client could even
connect in to the router and ping locally, but of course no client could
move TCP/IP
traffic of any kind out thru the 'WAN' side to the Internet. If I
re-powered/
rebooted the router, then it would work again for a few hours, before
inevitably going once again into this Internet-connectivity broken state.

This would happen both for directly-wired (cat-5) PCs as well as any
wireless PCs. I've worked with their tech support people on this problem
on about four separate occasions, and today they basically gave up, after
having exhausted all the possible ideas that they had. The units typically
came with firmware version 1.45.3 and they would exhibit this breakage
both before and after I downloaded the newest firmware version 1.45.7
and upgraded these units to this latest version of their firmware.

Other things that tech support had me try was put the private network
over into the 10.10.10.x range (from the default of 192.168.0.x).
They also had me try various MTU sizes, from the default of 1500, to
values of 1492 and 592. I also changed over all the client-PCs from
using DHCP on the local side to using STATIC-IP assignements.
At all these variations of setup, the problem would always occur again
after a few hours of operation. On any given typical day of working from
home, she had to power-cycle the Linksys router 4 times in the 8-hour
work period.

(The client PCs are both running Windows XP...one hardwired into a
cat-5 port, and the other one using a wireless PCMCIA (I tried various
units from various vendors). We also tried swapping out the cable-modem
from an older model of Motorola SurfBoard (model SB-4100) to a somewhat
newer model SB-4200.

The ISP provider is Comcast, and I've totally given it a clean bill of
health.
(As an alternate setup, instead of using the Linksys BEFW11S4 unit, I also
own an older D-Link 713P wireless router, which is rock-solid and
never exhibits this 'loss-of-Internet-connectivity' phenomenon.)

My rationale for moving from the much older D-Link wireless router to this
Linksys BEFW11S4 is basically because the Linksys has the best set
of features. The primary one that I want is the ability of the Linksys
family
of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
antennas
and instead attach EXTERNAL antennas of higher gain. (This feature seems
to be unique to Linksys in the 'residential price range' of $150.00 or
less.)

(I've considered purchasing the newest Linksys WRT54G (which has support
for both 802.11g as well as 802.11b), but there are rumors unconfirmed by
me that those models are also encountering this same problem. And, since
my wireless client-side cards are all the older 802.11b variety, the
additional capability of 802.11g would be of no benefit to me.)

I find it somewhat bizarre that Linksys firmware has this fatal show-stopper
problem and that no one at Linksys support can come up with anything
more to do (e.g. to elevate this issue into engineering or whatever). Tech
support DOES admit to me that other customers have and are still reporting
this problem-symptom. (Statistically, I have NO idea how many of us
are seeing the problem.) A few people have posted into newsgroup
"alt.internet.wireless' that they saw the same problem and like me, have
mostly just returned the units for a refund.

If anyone knows how I might elevate this problem or has any other
suggestions,
please post them. (And, if you know of any OTHER vendor of WAPs/ROUTERs
that have removable/replaceable antennas, in the residential price range,
please let me know.)

Based on MY EXPERIENCE, I would recommend to any new purchasers
of 802.11b wireless routers/access-points to try a vendor OTHER THAN
Linksys!

Regards...

Dave Cook [ DavidHCook (at) comcast (dot) net ]

David:

The problem has to do with the routing table getting wacked.
If you look at the routing table of the Linksys box during the problem
you will (or should) see extraneous characters. I reported this to
Linksys some time ago. Their Tech Support tried to help and even
offered several code upgrades but nothing fixed the problem. I
finally resorted to a Linksys cable/dsl router with 4 port switch
and a different vendor AP. I've had no additional problems.

-Steve

David Cook wrote:

>Over the past month or so, I purchased (and reluctantly returned)
>three separate BEFW11S4-V4 units. They all suffered from the same
>'show-stopper'
>problem: Typically after just a few hours, the router would simultaneous
>lose Internet-connectivity of all the client PCs out thru the cable-modem.
>(Once the router went into this 'broken state', I could still ping between
> all the clients on the local-network, and a new wireless client could even
> connect in to the router and ping locally, but of course no client could
>move TCP/IP
> traffic of any kind out thru the 'WAN' side to the Internet. If I
>re-powered/
>rebooted the router, then it would work again for a few hours, before
>inevitably going once again into this Internet-connectivity broken state.
>
>This would happen both for directly-wired (cat-5) PCs as well as any
>wireless PCs. I've worked with their tech support people on this problem
>on about four separate occasions, and today they basically gave up, after
>having exhausted all the possible ideas that they had. The units typically
>came with firmware version 1.45.3 and they would exhibit this breakage
>both before and after I downloaded the newest firmware version 1.45.7
>and upgraded these units to this latest version of their firmware.
>
>Other things that tech support had me try was put the private network
>over into the 10.10.10.x range (from the default of 192.168.0.x).
>They also had me try various MTU sizes, from the default of 1500, to
>values of 1492 and 592. I also changed over all the client-PCs from
>using DHCP on the local side to using STATIC-IP assignements.
>At all these variations of setup, the problem would always occur again
>after a few hours of operation. On any given typical day of working from
>home, she had to power-cycle the Linksys router 4 times in the 8-hour
>work period.
>
>(The client PCs are both running Windows XP...one hardwired into a
>cat-5 port, and the other one using a wireless PCMCIA (I tried various
>units from various vendors). We also tried swapping out the cable-modem
>from an older model of Motorola SurfBoard (model SB-4100) to a somewhat
>newer model SB-4200.
>
>The ISP provider is Comcast, and I've totally given it a clean bill of
>health.
>(As an alternate setup, instead of using the Linksys BEFW11S4 unit, I also
>own an older D-Link 713P wireless router, which is rock-solid and
>never exhibits this 'loss-of-Internet-connectivity' phenomenon.)
>
>My rationale for moving from the much older D-Link wireless router to this
>Linksys BEFW11S4 is basically because the Linksys has the best set
>of features. The primary one that I want is the ability of the Linksys
>family
>of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
>antennas
>and instead attach EXTERNAL antennas of higher gain. (This feature seems
>to be unique to Linksys in the 'residential price range' of $150.00 or
>less.)
>
>(I've considered purchasing the newest Linksys WRT54G (which has support
>for both 802.11g as well as 802.11b), but there are rumors unconfirmed by
>me that those models are also encountering this same problem. And, since
>my wireless client-side cards are all the older 802.11b variety, the
>additional capability of 802.11g would be of no benefit to me.)
>
>I find it somewhat bizarre that Linksys firmware has this fatal show-stopper
>problem and that no one at Linksys support can come up with anything
>more to do (e.g. to elevate this issue into engineering or whatever). Tech
>support DOES admit to me that other customers have and are still reporting
>this problem-symptom. (Statistically, I have NO idea how many of us
>are seeing the problem.) A few people have posted into newsgroup
>"alt.internet.wireless' that they saw the same problem and like me, have
>mostly just returned the units for a refund.
>
>If anyone knows how I might elevate this problem or has any other
>suggestions,
>please post them. (And, if you know of any OTHER vendor of WAPs/ROUTERs
>that have removable/replaceable antennas, in the residential price range,
>please let me know.)
>
>Based on MY EXPERIENCE, I would recommend to any new purchasers
>of 802.11b wireless routers/access-points to try a vendor OTHER THAN
>Linksys!
>
>Regards...
>
> Dave Cook [ DavidHCook (at) comcast (dot) net ]
>
>
>
>

In alt.internet.wireless David Cook <(who wants to know?)> wrote:

> (As an alternate setup, instead of using the Linksys BEFW11S4 unit, I also
> own an older D-Link 713P wireless router, which is rock-solid and
> never exhibits this 'loss-of-Internet-connectivity' phenomenon.)

> My rationale for moving from the much older D-Link wireless router to this
> Linksys BEFW11S4 is basically because the Linksys has the best set
> of features. The primary one that I want is the ability of the Linksys
> family
> of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
> antennas
> and instead attach EXTERNAL antennas of higher gain. (This feature seems
> to be unique to Linksys in the 'residential price range' of $150.00 or
> less.)

My SMC has removable antennas. Linksys has removabel antennas.
D-Link has removable antennas.

The AirPlus DI-614+
http://www.dlink.com/products/?model=DI-614%2b
External Antenna Type: Dual detachable reverse SMA

http://www.dlink.com/products/?pid=50
"Extend your range"
The D-Link ANT24-0401 connects to the DWL-900AP+, DI-614+, DI-714P+,
DWL-900AP, DI-714 and DI-713P.

Hey, wait a minute! You've got a DI-713P? That's listed here as
compatible with the external antenna.

HyperLink lists a cable for the 713, maybe not "P".
http://www.hyperlinktech.com/web/frameset_1.php

How are those antennas attached on the D-Link?
This makes it look like they use the same RP-SMA as the Linksys.

"David Cook" <(who wants to know?)> wrote in message
news:SP2dne_-(E-Mail Removed)...
> Over the past month or so, I purchased (and reluctantly returned)
> three separate BEFW11S4-V4 units. They all suffered from the same
> 'show-stopper'
> problem:
.. . . Misery loves company:
http://www.broadbandreports.com/foru...p,16~mode=flat

Interesting that YOU saw the routing table getting whacked.

But, I do NOT see that. (Maybe they fixed some 'corruption' problem
in newer firmware, but the underlying bug is still there!?) For what it's
worth, I'm using the newest V 1.45.7 firmware.

(I have NOT had any of the advanced routing functionality enabled.
But, now that you brought up this [possible] routing-table corruption,
I have now 'enabled' RIP2 as my dynamic routing mechanism for
both TRANSMIT and RECEIVE, and I will continue to monitor
the table each time at my next 'lockups'. Thanks for the heads-up.)

Cheers...

Dave



"SPD" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> David:
>
> The problem has to do with the routing table getting wacked.
> If you look at the routing table of the Linksys box during the problem
> you will (or should) see extraneous characters. I reported this to
> Linksys some time ago. Their Tech Support tried to help and even
> offered several code upgrades but nothing fixed the problem. I
> finally resorted to a Linksys cable/dsl router with 4 port switch
> and a different vendor AP. I've had no additional problems.
>
> -Steve
>
> David Cook wrote:
>
> >Over the past month or so, I purchased (and reluctantly returned)
> >three separate BEFW11S4-V4 units. They all suffered from the same
> >'show-stopper'
> >problem: Typically after just a few hours, the router would simultaneous
> >lose Internet-connectivity of all the client PCs out thru the
cable-modem.
> >(Once the router went into this 'broken state', I could still ping
between
> > all the clients on the local-network, and a new wireless client could
even
> > connect in to the router and ping locally, but of course no client could
> >move TCP/IP
> > traffic of any kind out thru the 'WAN' side to the Internet. If I
> >re-powered/
> >rebooted the router, then it would work again for a few hours, before
> >inevitably going once again into this Internet-connectivity broken state.
> >
> >This would happen both for directly-wired (cat-5) PCs as well as any
> >wireless PCs. I've worked with their tech support people on this problem
> >on about four separate occasions, and today they basically gave up, after
> >having exhausted all the possible ideas that they had. The units
typically
> >came with firmware version 1.45.3 and they would exhibit this breakage
> >both before and after I downloaded the newest firmware version 1.45.7
> >and upgraded these units to this latest version of their firmware.
> >
> >Other things that tech support had me try was put the private network
> >over into the 10.10.10.x range (from the default of 192.168.0.x).
> >They also had me try various MTU sizes, from the default of 1500, to
> >values of 1492 and 592. I also changed over all the client-PCs from
> >using DHCP on the local side to using STATIC-IP assignements.
> >At all these variations of setup, the problem would always occur again
> >after a few hours of operation. On any given typical day of working from
> >home, she had to power-cycle the Linksys router 4 times in the 8-hour
> >work period.
> >
> >(The client PCs are both running Windows XP...one hardwired into a
> >cat-5 port, and the other one using a wireless PCMCIA (I tried various
> >units from various vendors). We also tried swapping out the cable-modem
> >from an older model of Motorola SurfBoard (model SB-4100) to a somewhat
> >newer model SB-4200.
> >
> >The ISP provider is Comcast, and I've totally given it a clean bill of
> >health.
> >(As an alternate setup, instead of using the Linksys BEFW11S4 unit, I
also
> >own an older D-Link 713P wireless router, which is rock-solid and
> >never exhibits this 'loss-of-Internet-connectivity' phenomenon.)
> >
> >My rationale for moving from the much older D-Link wireless router to
this
> >Linksys BEFW11S4 is basically because the Linksys has the best set
> >of features. The primary one that I want is the ability of the Linksys
> >family
> >of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
> >antennas
> >and instead attach EXTERNAL antennas of higher gain. (This feature seems
> >to be unique to Linksys in the 'residential price range' of $150.00 or
> >less.)
> >
> >(I've considered purchasing the newest Linksys WRT54G (which has support
> >for both 802.11g as well as 802.11b), but there are rumors unconfirmed by
> >me that those models are also encountering this same problem. And, since
> >my wireless client-side cards are all the older 802.11b variety, the
> >additional capability of 802.11g would be of no benefit to me.)
> >
> >I find it somewhat bizarre that Linksys firmware has this fatal
show-stopper
> >problem and that no one at Linksys support can come up with anything
> >more to do (e.g. to elevate this issue into engineering or whatever).
Tech
> >support DOES admit to me that other customers have and are still
reporting
> >this problem-symptom. (Statistically, I have NO idea how many of us
> >are seeing the problem.) A few people have posted into newsgroup
> >"alt.internet.wireless' that they saw the same problem and like me, have
> >mostly just returned the units for a refund.
> >
> >If anyone knows how I might elevate this problem or has any other
> >suggestions,
> >please post them. (And, if you know of any OTHER vendor of WAPs/ROUTERs
> >that have removable/replaceable antennas, in the residential price range,
> >please let me know.)
> >
> >Based on MY EXPERIENCE, I would recommend to any new purchasers
> >of 802.11b wireless routers/access-points to try a vendor OTHER THAN
> >Linksys!
> >
> >Regards...
> >
> > Dave Cook [ DavidHCook (at) comcast (dot) net ]
> >
> >
> >
> >
>

Hmmm...that documentation about DI-713P having removable antennas
is CLEARLY in conflict with what I'm observing on my unit. No way that
my builtin-antennas can be taken off. And, no signs of any other places to
plug an external one onto it. So, that makes no sense to me.

Thanks for the info about those other vendor's boxes that DO allow external
antennas. (I may get around to trying one of them if this saga keeps up.)

Cheers...

Dave


<(E-Mail Removed)> wrote in message
news:bph673$mkf$(E-Mail Removed)...
> In alt.internet.wireless David Cook <(who wants to know?)> wrote:
>
> > (As an alternate setup, instead of using the Linksys BEFW11S4 unit, I
also
> > own an older D-Link 713P wireless router, which is rock-solid and
> > never exhibits this 'loss-of-Internet-connectivity' phenomenon.)
>
> > My rationale for moving from the much older D-Link wireless router to
this
> > Linksys BEFW11S4 is basically because the Linksys has the best set
> > of features. The primary one that I want is the ability of the Linksys
> > family
> > of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
> > antennas
> > and instead attach EXTERNAL antennas of higher gain. (This feature
seems
> > to be unique to Linksys in the 'residential price range' of $150.00 or
> > less.)
>
> My SMC has removable antennas. Linksys has removabel antennas.
> D-Link has removable antennas.
>
> The AirPlus DI-614+
> http://www.dlink.com/products/?model=DI-614%2b
> External Antenna Type: Dual detachable reverse SMA
>
> http://www.dlink.com/products/?pid=50
> "Extend your range"
> The D-Link ANT24-0401 connects to the DWL-900AP+, DI-614+, DI-714P+,
> DWL-900AP, DI-714 and DI-713P.
>
> Hey, wait a minute! You've got a DI-713P? That's listed here as
> compatible with the external antenna.
>
> HyperLink lists a cable for the 713, maybe not "P".
> http://www.hyperlinktech.com/web/frameset_1.php
>
> How are those antennas attached on the D-Link?
> This makes it look like they use the same RP-SMA as the Linksys.
>

>>How are those antennas attached on the D-Link?
>>This makes it look like they use the same RP-SMA as the Linksys.

(As I mentioned previously, the builtin antennas on MY DI-713P are NOT
removeable.)

Just to be nit-pickingly clear: Linksys uses RP-TNC, not RP-SMA connectors
for their antennas on their routers/waps. (These two are NOT the same.
Just a heads-up for anyone buying antenna-cable-pigtails...be sure to
double-check exactly what type of connectors
you need on the AP-end!)

Cheers...

Dave


<(E-Mail Removed)> wrote in message
news:bph673$mkf$(E-Mail Removed)...
> In alt.internet.wireless David Cook <(who wants to know?)> wrote:
>
> > (As an alternate setup, instead of using the Linksys BEFW11S4 unit, I
also
> > own an older D-Link 713P wireless router, which is rock-solid and
> > never exhibits this 'loss-of-Internet-connectivity' phenomenon.)
>
> > My rationale for moving from the much older D-Link wireless router to
this
> > Linksys BEFW11S4 is basically because the Linksys has the best set
> > of features. The primary one that I want is the ability of the Linksys
> > family
> > of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
> > antennas
> > and instead attach EXTERNAL antennas of higher gain. (This feature
seems
> > to be unique to Linksys in the 'residential price range' of $150.00 or
> > less.)
>
> My SMC has removable antennas. Linksys has removabel antennas.
> D-Link has removable antennas.
>
> The AirPlus DI-614+
> http://www.dlink.com/products/?model=DI-614%2b
> External Antenna Type: Dual detachable reverse SMA
>
> http://www.dlink.com/products/?pid=50
> "Extend your range"
> The D-Link ANT24-0401 connects to the DWL-900AP+, DI-614+, DI-714P+,
> DWL-900AP, DI-714 and DI-713P.
>
> Hey, wait a minute! You've got a DI-713P? That's listed here as
> compatible with the external antenna.
>
> HyperLink lists a cable for the 713, maybe not "P".
> http://www.hyperlinktech.com/web/frameset_1.php
>
> How are those antennas attached on the D-Link?
> This makes it look like they use the same RP-SMA as the Linksys.
>

Just to be perfectly clear (because I received on offline/private email that
was confused).

This symptom I am describing has little/nothing to do with antennas or even
just the wireless
side of the box. It is important to note that this 'loss of
Internet-connectivity' problem I
am describing happens even when I am not using ANY WIRELESS connections. It
can happen equally frequently when I am exclusively using only client PCs
that are connected
thru the wired-port/cat5 connections! Thus, this breakage is FUNDAMENTAL to
the very basic routing functions of this router. Thus, this is why I am
alerting the
rest of you to consider buying OTHER models/vendor-brands, because based on
all my testing and experience, the BEFW11S4-model of Linksys router contains
a
nasty bug. (Hopefully, it will get discovered and fixed by Linksys. But,
don't hold
your breath. I'm not.)

Hope this clarifies.

Cheers...

Dave



"David Cook" <(who wants to know?)> wrote in message
news:SP2dne_-(E-Mail Removed)...
> Over the past month or so, I purchased (and reluctantly returned)
> three separate BEFW11S4-V4 units. They all suffered from the same
> 'show-stopper'
> problem: Typically after just a few hours, the router would simultaneous
> lose Internet-connectivity of all the client PCs out thru the cable-modem.
> (Once the router went into this 'broken state', I could still ping between
> all the clients on the local-network, and a new wireless client could
even
> connect in to the router and ping locally, but of course no client could
> move TCP/IP
> traffic of any kind out thru the 'WAN' side to the Internet. If I
> re-powered/
> rebooted the router, then it would work again for a few hours, before
> inevitably going once again into this Internet-connectivity broken state.
>
> This would happen both for directly-wired (cat-5) PCs as well as any
> wireless PCs. I've worked with their tech support people on this problem
> on about four separate occasions, and today they basically gave up, after
> having exhausted all the possible ideas that they had. The units
typically
> came with firmware version 1.45.3 and they would exhibit this breakage
> both before and after I downloaded the newest firmware version 1.45.7
> and upgraded these units to this latest version of their firmware.
>
> Other things that tech support had me try was put the private network
> over into the 10.10.10.x range (from the default of 192.168.0.x).
> They also had me try various MTU sizes, from the default of 1500, to
> values of 1492 and 592. I also changed over all the client-PCs from
> using DHCP on the local side to using STATIC-IP assignements.
> At all these variations of setup, the problem would always occur again
> after a few hours of operation. On any given typical day of working from
> home, she had to power-cycle the Linksys router 4 times in the 8-hour
> work period.
>
> (The client PCs are both running Windows XP...one hardwired into a
> cat-5 port, and the other one using a wireless PCMCIA (I tried various
> units from various vendors). We also tried swapping out the cable-modem
> from an older model of Motorola SurfBoard (model SB-4100) to a somewhat
> newer model SB-4200.
>
> The ISP provider is Comcast, and I've totally given it a clean bill of
> health.
> (As an alternate setup, instead of using the Linksys BEFW11S4 unit, I also
> own an older D-Link 713P wireless router, which is rock-solid and
> never exhibits this 'loss-of-Internet-connectivity' phenomenon.)
>
> My rationale for moving from the much older D-Link wireless router to this
> Linksys BEFW11S4 is basically because the Linksys has the best set
> of features. The primary one that I want is the ability of the Linksys
> family
> of wireless APs to be able to remove the inexpensive builtin 3-inch-tall
> antennas
> and instead attach EXTERNAL antennas of higher gain. (This feature seems
> to be unique to Linksys in the 'residential price range' of $150.00 or
> less.)
>
> (I've considered purchasing the newest Linksys WRT54G (which has support
> for both 802.11g as well as 802.11b), but there are rumors unconfirmed by
> me that those models are also encountering this same problem. And, since
> my wireless client-side cards are all the older 802.11b variety, the
> additional capability of 802.11g would be of no benefit to me.)
>
> I find it somewhat bizarre that Linksys firmware has this fatal
show-stopper
> problem and that no one at Linksys support can come up with anything
> more to do (e.g. to elevate this issue into engineering or whatever).
Tech
> support DOES admit to me that other customers have and are still reporting
> this problem-symptom. (Statistically, I have NO idea how many of us
> are seeing the problem.) A few people have posted into newsgroup
> "alt.internet.wireless' that they saw the same problem and like me, have
> mostly just returned the units for a refund.
>
> If anyone knows how I might elevate this problem or has any other
> suggestions,
> please post them. (And, if you know of any OTHER vendor of WAPs/ROUTERs
> that have removable/replaceable antennas, in the residential price range,
> please let me know.)
>
> Based on MY EXPERIENCE, I would recommend to any new purchasers
> of 802.11b wireless routers/access-points to try a vendor OTHER THAN
> Linksys!
>
> Regards...
>
> Dave Cook [ DavidHCook (at) comcast (dot) net ]
>
>

In alt.internet.wireless David Cook <(who wants to know?)> wrote:
> Hmmm...that documentation about DI-713P having removable antennas
> is CLEARLY in conflict with what I'm observing on my unit. No way that
> my builtin-antennas can be taken off. And, no signs of any other places to
> plug an external one onto it. So, that makes no sense to me.

> <(E-Mail Removed)> wrote in message

>> The AirPlus DI-614+
>> http://www.dlink.com/products/?model=DI-614%2b
>> External Antenna Type: Dual detachable reverse SMA

I saw a DI-615 at the store today. That's a package of a DI-614+ and the
DWL-650+ PCMCIA card. It was in that plastic junk packaging, but it looked
like it was a detachable antenna.

At some level, they are all detachable ;-)
You could solder the connector of your choice to the motherboard.
http://www.nodomainname.co.uk/dwl120/dwl120.htm

I am experiencing a similar problem with Linksys WRT54G Wireless G. Works
for a few hours then wam.. starts by saying MSN messenger can't connect as
must be behind firewall, then IE can't find anything and no mail. Added
challenge as don't have local access to router as helping parents who are a
ways away. Set it up for them and it worked two days while there. Now it
seems to have stopped... Started researching and see that these symptoms are
common on the BEF11S4-V4, anyone experiencing issues with the WRT54G?

Thx