Line issues? Dropped calls, unvailables
Lately, I'd say within the past month, we've been having on and off issues with calls being dropped. Normally we chalk it up to the customer losing reception on their end, but we've had some strange occurances. For example: two customers on hold both dropping simultaneously. We've also had two reports of a customer calling in and immediately getting a "this number is unavailable", only to dial back moments later and get through.
Are these common issues that can be easily troubleshooted on my end? Or at least diagnosed?
Is there any sort of service available to alert us when the phones are down or not working properly?