I just installed a BCM 50 in a remote location w/Tie lines (2 channels on the T-1)going to the main site. There are three other sites using tie lines to the main site and they were in place prior to the installation of the BCM 50. These sites are working fine, they can call each other, call the main site and call the new site. However the new site can call(4 digits)the main site but when you go to call the other sites your get a busy(intercom,dail 4 digits, busy tone). The other sites including the main site have MICSs.The BCM 50 is only at the new site. Any thoughts or solutions to my problem.