Well i'm back.
i tryed it ,but when i try to remove the wic-2t and add nm-14t to slot 1 push apply .Wic-2t stays in that other slot.
I've tryed it with a new lab .First adding the nm-4t module then connecting it to a router.When i look back to the router i see that wic 2t is back.
I've read this on forum about it :
In the real world: a WIC-2T will give you two async/synchronous serial interfaces, and the NM-4T will give you 4 synchronous only serial interfaces. A NM-4T is a network module which is usually about the size of 4 WIC cards. They both use different types of physical connectors, but offer relatively the same functionality, connecting various remote topologies together. WIC-2T connects via a Smart Serial cable. NM-4T uses a DB-60 serial cable. Maximum data rates on the NM-4T are 8 Mbps on port 0; 4 Mbps each on port 0 and port 2; or 2 Mbps on all four ports simultaneously (8 Total). Depending on the slot the WIC-2T is inserted into, it can support up 8Mbs on both ports with a maximum of 6 ports at 8Mbps each.
How can i replace them on a existing lab?
Regards,
Christophe
