For the IE1000 Cisco switches, how long does the inrush current of 70A at 230V last.

I have a customer that has a number of vg200's [vg200-i6s-mz.122-11.T.bin] running MGCP with CM 3.1.2c.The analogue phones seem to take between 6-15 seconds to normaly clear a call down before another call/dial tone is avaliable to the user.Some user...