The 2620 does not support the NM-HDV2-1T1/E1 card and this goes for the whole 2600 series.
You'll find that any 2600xm series router will support the card and will require Cisco IOS Release 12.3(8)T or later. Shouldn't think you'll need the PVDM2-48 as well.
Hope this is useful.
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