Although DrayTEL's basic service is provided free of charge but we still maintain the highest standards of reliability. We have an excellent history of reliable and continuous service and it is our goal to provide an uninterrupted service. DrayTEL's connectivity is provided by multiple independent Internet and PSTN providers, giving us prudent redundancy and we have continuous monitoring of the systems. You are relying on the underlying Internet connectivity so if your own or onward Internet connectivity is congested or interrupted, it can affect performance, however you should normally be very satisfied with the call quality. Whilst this should give you confidence in the quality and performance of our service, there is no specific service level guarantee.