i met a 7961handset problem, this handset can not hear dial tone when i pick the hand,but i test this handset on other phone, confirm this handset can works well ,i also use a good handset to connect the handset port on this 7961,but the problem is same ,i can not hear any dial tone . my user use a old 7960 phone, i replace this 7960 by using this 7961,i just do a super copy ,and meanwhile , on CM we can see 2 same extension number, but i can not hear dial tone from 7961 handset, if there are 2 same extension number on CM,and one is 7960,another is 7961,so we just use one hard phone and another phone will not hear any tone from handset? how to solve this ?>