We are getting ready to install some 3904 series sets with push to talk handsets at one of our call centers. The issue is that we cannot get dialtone on the hand set when we go off hook. If we push the button on the handset and then go off hook we get dial tone. We tried the handset on a 3903 set and works fine, without pushing the button first. Does anybody have suggestions?
Thanks in advance.
Thanks in advance.