Abstract: A telecommunication network transmission divergence system and method is disclosed. A first multi-service-packet-control-unit and a second multi-service-packet-control-unit are disposed between a base station and a radio network controller. Packets are diverged to one or more low-stability & long-delay routes based on priorities of the packets. The system and method reduce transmission load of a frame exchange protocol interface (Iub) while maintaining a stable quality of service for divergent packet transmissions. As a result, transmission load and cost are significantly reduced and transmission efficiency is improved.