A network services request unit that is sent by a system services control point(SSCP) to a logical ?unit? (LU) to inform the LU of the status of a procedure requested by the LU.

• 一种网络服务请求单元，由系统服务控制点(SSCP)送到逻辑单元(LU)，通知该逻辑单元所请求过程的状态。