It’s important to understand your communication needs. On-call responses allow the customer to get the help they need in a timely manner. It would be tragic to have a major malfunciton of your tower, but no tools to alert you. Some clients are deterred because of costs. On-call response systems are becoming more affordable.
VRTX has the option for the VCS system. The VCS comes standard with a dry relay that can be programmed for a Normally Open
or Normally Closed alarm indication. This relay can be wired directly into an existing building automation system to alert the system to an alarm condition or can be wired directly to an indicator light for quick reference.