A VPN3000 with four empty slots is a 3015; with one SEP card it's a 3030, and with
two SEP cards it's a 3060. If it has two SEP cards and you take one out then it
downgrades from a 3060 to a 3030.
Please take a look at following link for additional information:
http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_getting_start
ed_guide_chapter09186a008015cfd6.html
The SEP modules for concentrators are NOT hot swappable; So, you need to turn the VPN3000 off before you put the SEP Module(s) in.
I hope it helps.
Regards,
Arul
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