Well I kind of figured that's what I had to do but the manufacurers instruction gave the opposite impression. Mounting switch (i.e placing it in a 'telco' rack) is step 4 , whereas connect a console to switch is step 8. HP seem to think its OK to connect devices to the switch before configuring it. Infact the configuration is said to be 'optional'.
As for me, I just wanted to get it in the cabinet ASAP then configure and then attach devices. So why, when all other managed switches have front facing ports, does 2600 series have ones at the back? Re-grrrr
It needlessly lengthens the profile of the switch as you have to keep the serial lead connected permanently cos there's no way you can just attach and detach as and when you need like with other switches. Maybe some people are lucky enough to have cabinets with 360 access
Sorry I'll carm down now.