文中设计了一种紧耦合式信令网桥,通过转发信令链路信元,实现信元截取、话务阻断等功能,并实现了通话的实时监控,在公共安全等领域实用性强。紧耦合方式设计具有低延时、低负荷、隐蔽性好等优点,设计的重点是准确处理添加、截取信元后两个方向上信元的序号映射,以及网桥两侧链路故障的同步。该网桥经现场测试表明:能够灵活地实现各种业务,且实时性非常高。 In this paper, a tightly coupled signaling bridge is designed. Through signaling signaling link cells, cell interception and traffic blocking functions are realized, and the real-time monitoring of calls is achieved. The utility model has strong practicability in public safety and other fields . Tightly coupled design has the advantages of low delay, low load and good concealment. The key point of the design is to accurately handle the sequence mapping of cells in both directions after adding and intercepting cells and the synchronization of link failures on both sides of the bridge . The bridge on-site tests show that: the flexibility to achieve a variety of business, and real-time is very high.