I have started installing some BCM50s in the field. I have noticed an audible click when getting an actual line from the line pool. The click occurs once before getting dial tone. It is quite noticeable when using handsfree. Phones are T7316s and T7208s (brand new). All four that I have installed do this. I am curious about this because I already had one of them blow up regarding line 4, it just stopped working (no more dial tone when the line is accessed). Any thoughts, or comments, regarding this would be appreciated.