Microbursts on Ceragon IP-10G

Hello, I have a Ceragon IP-10G to provide backhaul access for an LTE network. The client wants to have 50Mbps of throughput with an RTT of 50ms on a single TCP session. The problem are the packet drops due to microbursts due to tcp slow start come from a 1GE port and then they get dropped at the radio. I can burst about 60KB of data before experiencing packet loss. Has anyone has a similar problem with this problem and found a solution? PS: I already have a case open, its just going kind of slow. Thanks, Abel.