Will a Vwic2-1mft-703 card in slot 1 of a 2620XM work at this time the router is running c2600-advipservicesk9-mz.123-19a? What ios is needed? - we normal run the 19a range
I found a document on the Cisco web site which identifies the minimum release required to support this card on 2600XM as being 12.2(8)T. So I believe that you are good with your 12.3(19a).
If you want to see details here is the link to the document:
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