Many Greater Danbury area Police Departments cautioned yesterday that there was a problem completing some calls for service.  There was an issue with Verizon subscribers for several hours yesterday afternoon.  The Danbury Police Department call center was fully up and running and noted that they were able to accepting texts to 911 if a Verizon subscriber needed immediate assistance.    Newtown Police reminded residents about the availability of texting 911 if needed in the future to be put in contact with emergency services.  Characters are limited though, so people will have to be brief, if possible, in the message. Ridgefield Police had noted it was a problem across the state and urged users to call from a landline in the meantime.  Wilton Police said their Internet Services Division was working with Verizon to resolve the issue.