The Montgomery County director of 911 said the county will upgrade its software system after several emergency calls were either dropped or had bad reception. "Not being able to hear well. A lot of breaking up, that sort of thing," explained director Betty Williams. "Because of that issue, we're doing a major upgrade Thursday morning." The system used by the county to receive 911 calls wasn't handling calls from mobile phones, which make up the majority of the nearly 1,000 calls each day. On Thursday, the county will re-route all 911 calls to Robertson County's call center while nearby Montgomery County receives a software update. Staff members will be stationed in Robertson County to route calls to the appropriate responders in Montgomery County. "They should not see any change on their end, but if they do I certainly want to know about it," said Williams.The software upgrade is expected to take about an hour. "Unfortunately it's just one of those things you have to go through when new technology is coming in. There are things that aren't working the way it's supposed to," said Williams.The problem affected several calls according to Williams. She said One or two of those calls were "seriously missed," Williams said, adding that was too many."Williams also said other counties may be experiencing the same issue with the equipment and software.