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New Member

2 x WIC-2T or 1 x NM-4T

I need to connect 4 E1-links using a 3640-router. Is a NM with two WIC-slots, each containing a WIC-2T a valid configuration or would I need a separate NM-4T?

  • Other Network Infrastructure Subjects
2 REPLIES
Cisco Employee

Re: 2 x WIC-2T or 1 x NM-4T

I'm not positive if a single NM can take 2 WIC-2Ts, but the WIC-2T is not supported in any of the following NMs:

NM- 1E2W, NM- 1E1R2W, and NM-2E2W.

You would require at least an NM with the FE port (i.e. NM-2FE2W) or an NM-2W.

Our documentation says that a single WIC-2T can:

"WIC-2T Sync support with a max speed of 2.048 Mbps

- Supports one port at 8 Mbps when used in NM-1FE1R2W, NM-1FE2W, NM-2FE2W, or NM-2W or 2600 chassis WIC slots. All other WIC ports on that network module or 2600 chassis must not be used.

- Supports two ports at 4 Mbps each when used in NM-1FE1R2W, NM-1FE2W, NM-2FE2W, or NM-2W or 2600 chassis WIC slots. All other WIC ports on that network module or 2600 chassis must not be used. "

This leads me to believe that the NMs listed above can support 8Mbps full duplex, which would be equivalent to 4 x 2Mbps = 4 E1s. So, looks like the hardware can support it, but I'm not sure if this is the "official Cisco answer."

Regards,

Clay

New Member

Re: 2 x WIC-2T or 1 x NM-4T

It depends on your budget and need for flexibility.

For the budget leg, answer of the following is important;

If {Price of [NM-4T]} > {Price of [NM-2W] and 2*[WIC-2T]} then

purchase( [NM-4T] )

Else

purchase( [NM-2W] and 2*[WIC-2T] )

For the flexibility;

You can replace WIC-2T with WIC-2A/S, BRI card etc at anytime. And you can carry those WICs wherever location you need.

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