bstunRouteRSAP 1.3.6.1.4.1.9.9.35.1.4.1.1.13

If bstunRouteType is serialLLC2 then this is the llc2 sap value used for the point-to-point link to the remote partner; if bstunRouteType is ip or serial or serialFrameRelay then this field is 0.