Thanks for the clarification, however the link you sent does not specify anything about the power up or down for the installation or removal of this card. Am I missing something or did I not read enough?

On top "Online Insertion and Removal" http://www.cisco.com/en/US/products/hw/modules/ps2033/products_installation_and_configuration_guide_chapter09186a0080328060.html#wp1039320

I just remembered because I check it first before I remove DS3 PA for my 7500 3 years ago.

Regards,

Dandy

Here is the part I was just reading.

OIR allows you to install and replace port adapters or service adapters (carrier cards, VIPs and FlexWAN modules) while the router is operating; you do not need to notify the software or shut down the system power, although you should not run traffic through the port adapter you are removing while it is being removed. OIR is a method that is seamless to end users on the network, maintains all routing information, and preserves sessions.

first sentance states that you do not need to shut it down.

I agree it is a good idea to do so anytime, but not necessary according to this doc.

However, I am not very familiar with the 7600 so I am also seeking knowledge in this area.

Thanks for your help guys - I couldn't find anything definitive for the 7600 that's why I asked - the OIR document doesn't really spell it out too clearly..

Found this:

"It is wise to gracefully shut down the system before removing a port adapter or module that has active traffic moving through it. Removing a port adapter or module while traffic is flowing through the ports can cause system disruption. Once the port adapter or module is inserted, the ports can be brought back up. "

This is in the Online Insertion and Removal section.