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Dan Goodinson
2005-03-03, 08:42
I thought there was some issue with CPU, which means that the PCMCIA
card couldn't be upgraded... I thought it was something related to bus
width or similar...

Sorry if I've given wrong info ;-)

-----Original Message-----
From: discuss-bounces (AT) lists (DOT) slimdevices.com
[mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of Jason
Sent: 03 March 2005 15:34
To: 'Slim Devices Discussion'
Subject: [slim] Using external accesspoint to get g format


That's not entirely true. The NIC on the SB is only capable of 10Mb
half duplex speeds which are well under what 802.11g is capable of.

> -----Original Message-----
> From: discuss-bounces (AT) lists (DOT) slimdevices.com
> [mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of
> Dan Goodinson
> Sent: Thursday, March 03, 2005 8:16 AM
> To: Slim Devices Discussion
> Subject: [slim] Using external accesspoint to get g format
>
> It's a limitation of the CPU used by Squeezebox.
>
> But if you connect SB to a 'G' wireless access point via
> ethernet, then you'll get full 'G' speed networking through
> your 'G' access point.
>
> -----Original Message-----
> From: discuss-bounces (AT) lists (DOT) slimdevices.com
> [mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of
> Arthur Cheng
> Sent: 03 March 2005 15:13
> To: 'Slim Devices Discussion'
> Subject: [slim] Using external accesspoint to get g format
>
>
> I am using wireless version of squeezebox, I wonder if I
> connect squeezebox with an accesspoint that support G would I
> be able to get the full function of it? I remember seeing
> some where that I cannot simply upgrade the PCMCIA card
> inside because of the limitation in buffer and something else?
>
>
>
>
>

Aaron Zinck
2005-03-03, 09:27
"Dan Goodinson" wrote
>I thought there was some issue with CPU, which means that the PCMCIA
>card couldn't be upgraded... I thought it was something related to bus
>width or similar...
>
>Sorry if I've given wrong info ;-)

No, you're fine--indeed the bus isn't sufficiently fast to handle a g PCMCIA
card--Jason was just pointing out that if you do use a wireless bridge the
theoretical throughput of wireless G exceeds the throughput of the
squeezebox's wired nic (making the squeezebox's nic the bottleneck in this
situation), thus his point that you will not be able to realize the full
theoretical throughput of wireless G on a squeezebox even with a bridge (at
most you'll get 10mb half-duplex). This won't be a problem, though--clearly
10mb half-duplex is plenty fast for the application (haven't heard of any
bandwidth problems with wired players) and indeed the g bridge will perform
better than the 802.11b that's built-in to the box. You'll probably see
practical speeds of ~5mbps with b while with the g (depending on your
environment) you may well fully saturate the available 10mb half-duplex
bandwidth.

Ben Klaas
2005-03-03, 09:56
this thread is a bit confusing, so...to clarify--

if you use an ethernet cable between the *wired* port on the back of the
squeezebox and the 802.11g access point, that should work just dandy.

in this solution, the 802.11b on the squeezebox is *unused*.

#!/ben

(of course, this will leave you wondering why you spent the extra $80
for the wireless version, but that topic i'm sure has been already
talked to death... ;) )

Dan Goodinson wrote:
> I thought there was some issue with CPU, which means that the PCMCIA
> card couldn't be upgraded... I thought it was something related to bus
> width or similar...
>
> Sorry if I've given wrong info ;-)
>
> -----Original Message-----
> From: discuss-bounces (AT) lists (DOT) slimdevices.com
> [mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of Jason
> Sent: 03 March 2005 15:34
> To: 'Slim Devices Discussion'
> Subject: [slim] Using external accesspoint to get g format
>
>
> That's not entirely true. The NIC on the SB is only capable of 10Mb
> half duplex speeds which are well under what 802.11g is capable of.
>
>
>>-----Original Message-----
>>From: discuss-bounces (AT) lists (DOT) slimdevices.com
>>[mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of
>>Dan Goodinson
>>Sent: Thursday, March 03, 2005 8:16 AM
>>To: Slim Devices Discussion
>>Subject: [slim] Using external accesspoint to get g format
>>
>>It's a limitation of the CPU used by Squeezebox.
>>
>>But if you connect SB to a 'G' wireless access point via
>>ethernet, then you'll get full 'G' speed networking through
>>your 'G' access point.
>>
>>-----Original Message-----
>>From: discuss-bounces (AT) lists (DOT) slimdevices.com
>>[mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of
>>Arthur Cheng
>>Sent: 03 March 2005 15:13
>>To: 'Slim Devices Discussion'
>>Subject: [slim] Using external accesspoint to get g format
>>
>>
>>I am using wireless version of squeezebox, I wonder if I
>>connect squeezebox with an accesspoint that support G would I
>>be able to get the full function of it? I remember seeing
>>some where that I cannot simply upgrade the PCMCIA card
>>inside because of the limitation in buffer and something else?
>>
>>
>>
>>
>>

seanadams
2005-03-03, 10:53
It's not exactly a speed/bandwidth issue, it's that there are no
802.11g cards available for the 16-bit PCMCIA interface, which is what
Squeezebox has. The issue is that it's just the wrong bus for 802.11g,
not that it's too slow.

802.11g modules use PCI, either in the form of CardBus (uses the same
connector as PCMCIA, but totally different interface) or MiniPCI.

The real benefit of 802.11g for our purposes is partly the 2x+ raw
throughput, but mainly the improved range, better reliability, and
better "playing well with others" on the spectrum.

As far as the ethernet interface is concerned: it is 10Mbps
full-duplex, which as several people have pointed out, is nearly as
fast as 802.11g anyway. If squeezebox had an enormous amount of memory
for audio buffering, then 100Mbps would be nice, because it would let
the buffer fill/refill very quickly. However, this is WAY beyond the
throughput needed for PCM streaming, so it wouldn't make any difference
with the memory we have - on 10Mbps ethernet it already fills in less
than 200ms.


On Mar 3, 2005, at 8:27 AM, Aaron Zinck wrote:

> "Dan Goodinson" wrote
>> I thought there was some issue with CPU, which means that the PCMCIA
>> card couldn't be upgraded... I thought it was something related to
>> bus
>> width or similar...
>>
>> Sorry if I've given wrong info ;-)
>
> No, you're fine--indeed the bus isn't sufficiently fast to handle a g
> PCMCIA
> card--Jason was just pointing out that if you do use a wireless bridge
> the
> theoretical throughput of wireless G exceeds the throughput of the
> squeezebox's wired nic (making the squeezebox's nic the bottleneck in
> this
> situation), thus his point that you will not be able to realize the
> full
> theoretical throughput of wireless G on a squeezebox even with a
> bridge (at
> most you'll get 10mb half-duplex). This won't be a problem,
> though--clearly
> 10mb half-duplex is plenty fast for the application (haven't heard of
> any
> bandwidth problems with wired players) and indeed the g bridge will
> perform
> better than the 802.11b that's built-in to the box. You'll probably
> see
> practical speeds of ~5mbps with b while with the g (depending on your
> environment) you may well fully saturate the available 10mb half-duplex
> bandwidth.
>
>
>
>