a company called and needed me to replace an sbx ksu with exp card. they sent the equiptment and i put it in. after maybe 3 months customer called and said they cant make calls. i got there and it wouldnt dial digit 1 on the dialpad on any phones. couldnt even dial icm calls. i did a default and put in ip address so the seller could program remotely. things went well for about a month and it happened again. has anyone else experianced this. the system was new last fall. thanks. dave