The 'jumpover' connector draws straight lines with small arcs in place of link-link intersections. (For the time being, it cannot detect intersections with 'smooth' router links). It accepts the following additional arguments, which can be passed as the connector.args property:

size number The size of the jump (the diameter of the arc, or the length of the empty spot on the line). Defaults to 5.
jump string The style of the jump. Either 'arc' (using an Arcto SVG path command), 'cubic' (using a Curveto path command as a normalized approximation to Arcto), or 'gap' (leaving a blank space). Defaults to 'arc'.
radius number The curve radius of the rounded corners. Default is 0.

Example:

link.connector('jumpover', {
    type: 'gap'
});