This attribute specifies the delay importance of the packets when
forwarded over WAN connections. Packets with higher emission
priority (wep 1) are transmitted before packets with lower emission
priority (wep 2). Delay sensitive packets should be sent with
emission priority one (wep 1). This attribute has been obsoleted and
is replaced by emissionPriority attribute under Vr/n Ip Pg/n
CosTreatment/n component.