Comms Help

[gc]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Hi all,

I need suggestions as to how to connect two computers together.

My transmission medium is one 6+ km length of singlemode fibre, on which I
need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
400Mb/s upload / 1Mb/s download).
I think WDM seems to be the answer!

Some error checking or forward error checking protocol needs to be
implemented into the data being transmitted, and one of the cpu board
(transmitting at 400Mb/s) needs to be a small form factor and capable of
accepting the 400Mb/s as a serial or parallel data stream.


I know i'm not asking much

Thanks for any suggestions

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Bonjour gc,

> My transmission medium is one 6+ km length of singlemode fibre

Is it really 1 fibre in duplex or 2 simplex fibres?

> on which I
> need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
> 400Mb/s upload / 1Mb/s download).
> I think WDM seems to be the answer!

WDM if you have 1 duplex fibre

> Some error checking or forward error checking protocol needs to be
> implemented into the data being transmitted

Perhaps it's better you see ATM in STM-16 (2.5 Gbit/s gross bit rate) in
WDM. You have all the control and 0&M you need.
Instead of ATM your can also see the new protocol GFP for carrying
structured or unstructured (flow of bits) data over SDH.

> a small form factor

What this in this context?

Regards,
Michelot

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

In article <cmvd87$571$1@titan.btinternet.com>,
"gc" <g@g.com> writes:
>Hi all,
>
>I need suggestions as to how to connect two computers together.
>
>My transmission medium is one 6+ km length of singlemode fibre, on which I
>need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
>400Mb/s upload / 1Mb/s download).
>I think WDM seems to be the answer!

Hardly. On a single fiber, a passive splitter is the most economic
solution. Although this introduces an additional 6dB, this can be
made up by long-haul optics if necessary.

>
>Some error checking or forward error checking protocol needs to be
>implemented into the data being transmitted, and one of the cpu board
>(transmitting at 400Mb/s) needs to be a small form factor and capable of
>accepting the 400Mb/s as a serial or parallel data stream.
>
Unless it is _really_ delay sensitive, I would go Gbit Ethernet and
use TCP or lapb instead of reinventing the wheel.

--
Manfred Kwiatkowski kwiatkowski@zrz.tu-berlin.de

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

Curious, I don't see my comments. I repost again.

=======

Bonjour gc,

> My transmission medium is one 6+ km length of singlemode fibre

Is it really 1 fibre in duplex or 2 simplex fibres?

> on which I
> need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
> 400Mb/s upload / 1Mb/s download).
> I think WDM seems to be the answer!

WDM if you have 1 duplex fibre

> Some error checking or forward error checking protocol needs to be
> implemented into the data being transmitted

Perhaps it's better you see ATM in STM-16 (2.5 Gbit/s gross bit rate) in
WDM. You have all the control and 0&M you need.
Instead of ATM your can also see the new protocol GFP for carrying
structured or unstructured (flow of bits) data over SDH.

> a small form factor

What this in this context?

Regards,
Michelot

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

gc <g@g.com> wrote:
> Hi all,

> I need suggestions as to how to connect two computers together.

> My transmission medium is one 6+ km length of singlemode fibre, on which I
> need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
> 400Mb/s upload / 1Mb/s download).
> I think WDM seems to be the answer!

> Some error checking or forward error checking protocol needs to be
> implemented into the data being transmitted, and one of the cpu board
> (transmitting at 400Mb/s) needs to be a small form factor and capable of
> accepting the 400Mb/s as a serial or parallel data stream.

Seems to be a fairly standard net/freebsd system using any Gbit-nic
( the disc might be limiting the above speed)



> I know i'm not asking much
No. Standard software, standard hardware.

> Thanks for any suggestions





--
Peter Håkanson
IPSec Sverige ( At Gothenburg Riverside )
Sorry about my e-mail address, but i'm trying to keep spam out,
remove "icke-reklam" if you feel for mailing me. Thanx.

 

[Guest]

Archived from groups: comp.dcom.lans.ethernet (More info?)

gc wrote:

> I need suggestions as to how to connect two computers together.

> My transmission medium is one 6+ km length of singlemode fibre, on which I
> need to achieve bi-directional data transfer at approx 1Gb (Guaranteed
> 400Mb/s upload / 1Mb/s download).
> I think WDM seems to be the answer!

Can you do it half duplex? Though I am not sure how to do line
turnaround even if you can. Maybe passive splitters and turn
off the laser of the direction not being used.

-- glen