I currently am using a 2621 router with an NM-4t1-IMA module which connect my DSL customers to the Internet.
I would like to upgrade the 2621 with a 2851. What would be the equivalent network module that I could use on the 2851 to provide the NM-4T1-IMA features ?
Note except the VWIC2, all these products, including the 2851, are End of Sales, and to be considered obsolete.
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