Trying to investigate a latency issue with a T-1.
You have a full point-to-point T-1 to a remote site (approx 3 miles away). The circuit has 5% to 10% load max. When you perform a ping from the router at your main site to the branch office router you get very high 1000ms to 2000ms response times and averages of 200ms to 800ms. The circuit has no errors and you had the ISP run full testing on the circuit. If your equipment checks good then where is a next good place to start looking for the issue? This latency is even experienced in the early morning hours when the remote beanch is closed with virtually no load on the circuit.