We had a point to point 1841 cisco router at our remote office.
The circuit works fine during morning but afternoon the circuit starts bouncing.The router had a lot of CRC errors.Well Sprint tested the circuit and they said it was good and clean. They are seeing errors on CSU.We replaced our demarc, T1 card on router and line still we have problem. I don't know why it has no problem during morning hours. If anyone experienced this problem please reply thanks.