HWIC-1GE-SFP with GLC-EX-SMD

[ogor]

Hi,

Is it supported to have a HWIC-1GE-SFP with GLC-EX-SMD ? I have 12km to covert in gigabit over an SMF fiber.

or do I have to ordered GLC-ZX-SM ?

Many thanks in advance

Olivier

[Reza Sharifi]

Hi  Olivier

You can use either one. GLC-ZX-SM is up to 100km and GLC-EX-SMD is up to 40km

have a look at table-2 in this link:

http://www.cisco.com/en/US/prod/collateral/routers/ps5854/prod_qas0900aecd80169bf0_ps5949_Products_Q_and_A_Item.html

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/installation/note/78_15160.html

HTH

[ogor]

Hi,

Sorry Reza but it's clearly writen than GLC-EX-SMD with HWIC-1GE-SFP are compatible.

I would like to use it on a Cisco 2921.

Best Regards

Olivier

[Leo Laohoo]

Hi Oliver,

You are correct that the SMD is supported.  The question is not that.  The question you should be wary about is the STRENGTH of the laser to travel that short distance is too strong.  You will wind up either burning either ends of the SFP module or getting packet drops. 

[ogor]

Hi Leolaohoo

So it's better to use GLC-LX-SM ?

regards

Olivier

[Leo Laohoo]

So it's better to use GLC-LX-SM ?

Heck yes!

Otherwise, you need attenuators.  Not just any attenuators.  You need the RIGHT kind of attenuators with a fixed amount of number.

Plus do you know how much cheaper is an LX compared to an SMD? 

[get_rthym]

hi Reza,

Isn't lx SMd for 10km n Olivia has 12 km to connect.

Regards

Lek

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