[c-nsp] Sorta OT: MM GBICs

[info at beprojects.com]

From:
http://www.cisco.com/en/US/products/hw/routers/ps341/prod_module_installation_guide09186a00801cc731.html

WS-G5484
GLC-SX-MM
Short wavelength (1000BASE-SX)
Contains a Class 1 laser of 850 nm for 1000BASE-SX (short wavelength) 
applications.


And a quick google on "class 1 laser":

Class 1 lasers are products where the irradiance (measured in watts per 
metre square) of the accessible laser beam (the accessible emission) 
does not exceed the Maximum Permissible Exposure (MPE) value. Therefore, 
for Class 1 laser products the output power is below the level at which 
it is believed eye damage will occur. Exposure to the beam of a Class 1 
laser will not result in eye injury and may therefore be considered 
safe. However, some Class 1 laser products may contain laser systems of 
a higher Class but there are adequate engineering control measures to 
ensure that access to the beam is not reasonably likely. Examples of 
such products include laser printers and compact disc players. Anyone 
who dismantles a Class 1 laser product that contains a higher Class 
laser system is potentially at risk of exposure to a hazardous laser beam.


Church, Chuck wrote:
> I've heard both rumors.  I found this:
> http://www.t11.org/ftp/t11/docs/GBICR4-5.pdf
> 
> It seems to be a laser.  But then again it's not Cisco.  Whether or not
> it's possible to get 850 nm light at the  correct power with either
> laser or LED is something I'm not sure of.  So maybe both are
> possible...
> 
> 
> Chuck Church
> Lead Design Engineer
> CCIE #8776, MCNE, MCSE
> Netco Government Services - Design & Implementation
> 1210 N. Parker Rd.
> Greenville, SC 29609
> Home office: 864-335-9473
> Cell: 703-819-3495
> cchurch at netcogov.com
> PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of McCallum, Robert
> Sent: Thursday, March 17, 2005 11:26 AM
> To: 'Ivan Groenewald'; 'Brant I. Stevens'; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Sorta OT: MM GBICs
> 
> woops I stand corrected by a transmission guy - ITS AN LED and that's
> final.
> 
> Robert McCallum 
> CCIE #8757 R&S
>  
> 
> 
>>-----Original Message-----
>>From: Ivan Groenewald [mailto:ivang2 at xtrahost.co.uk] 
>>Sent: 17 March 2005 15:36
>>To: 'Brant I. Stevens'; cisco-nsp at puck.nether.net
>>Subject: RE: [c-nsp] Sorta OT: MM GBICs
>>
>>
>>I looked into one the other day, the temporary blindness that 
>>ensued suggested it's a LASER </mini-me>
>>
>>
>>
>>
>>Ivan Groenewald <ivang at xtrahost.co.uk>
>>Tel: 0845 345 0919
>>Xtraordinary Hosting, 6 The Clocktower, South Gyle, 
>>Edinburgh, EH12 9LB http://www.xtrahost.co.uk
>>
>>
>>-----Original Message-----
>>From: cisco-nsp-bounces at puck.nether.net 
>>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Brant 
>>I. Stevens
>>Sent: 17 March 2005 15:34
>>To: cisco-nsp at puck.nether.net
>>Subject: [c-nsp] Sorta OT: MM GBICs
>>
>>All,
>>
>>Please forgive the semi-unrelated post, but I have $20 riding 
>>on this...
>>
>>>=) Do MM GBICs use a laser, or an LED for data transmission?
>>
>>Replies off-list are fine...
>>
>>Thanks,
>>Brant
>>
>>
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> 
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