where to place VIC3-4FXS/DID - NM or HWIC?

[madmin.kz]

I want insert VIC3-4FXS/DID in my 2911 router.

Where two ways to do it:

1. Insert in HWIC slot

OR

2.  Insert in NM module

What is the difference?

[paolo bevilacqua]

In V/HWIC slot.

You will also need PVDM3 DSP module.

[madmin.kz]

Paolo, thanks a lot.

But can you explain the difference?

[paolo bevilacqua]

No need for NM.

Please remember to rate useful posts clicking on the stars below.

[Michael Mendoza]

VIC3 cards can be inserted in both NMs and chassis HWICs. I don't believe you need PVDM3 cards specifically to support them but a recent IOS is required (anything in the 15T should be good). You may want to go through these two links:

http://www.cisco.com/en/US/products/ps10536/products_relevant_interfaces_and_modules.html#voicemod

http://www.cisco.com/en/US/prod/collateral/modules/ps5365/product_data_sheet0900aecd801c595e.html

HTH

[paolo bevilacqua]

Of course PVDM3 is required. No voice card can work without DSP.

[Michael Mendoza]

I meant PVDM2 cards would also work; not just PVDM3. And just in case, IOS 12.4(20)T or later is required.

[Michael Mendoza · Accepted solution]

Now, about the difference: there really isn't any from a functional stand point; but if you choose to use a NM there may be additional HW considerations when it comes to PVDM card distribution between the motherboard's PVDM slots and the NMs slots.

Here are a couple of other usefull links:

DSP calculator (includes ISR G2 platforms):

http://www.cisco.com/web/applicat/dsprecal/dsp_calc.html

http://www.cisco.com/en/US/prod/collateral/modules/ps3115/qa_c67_553073_ps10537_Products_Q_and_A_Item.html

HTH

[r-godden]

you might also want to consider the maintenance aspect and what slots support online removal cards should they fail.

[madmin.kz]

Thanks everyone for reply!