曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
• 实际工程经验和技术支持
Use example to illustrate integration with existing system.
For example, Police National Computer (PNC) in UK is an existing
database, where licence plate search application was integrated. This
allowed police on the roads/motorways to make checks as and when
necessary. Previously, police would have had to call Dispatch Centre
to raise search, taking up valuable time and tying up two people –
police office & control room - to perform a simple task.
超大容量及超高密度话务量的考虑
• 用户密度高：如某机场，根据需求调研和预测，到2010年系统用户将超
过10000台。
• 话务量大：系统必须能够承受高密度大话务量的冲击
选择系统要求：
• 分布式处理设计：专为关键任务而设计的系统，保障“接入时间”始终小
于500ms。
• 辅助集群调度功能：通过“强拆、强插、动态数据信道”等功能保障高优
先级的调度通话，以及通过“通话组合并”、“区域呼叫”等功能降低话务
量。
奥运会、世界杯、世博会、亚运会的实践检验。
Use example to illustrate integration with existing system.
For example, Police National Computer (PNC) in UK is an existing
database, where licence plate search application was integrated. This
allowed police on the roads/motorways to make checks as and when
necessary. Previously, police would have had to call Dispatch Centre
to raise search, taking up valuable time and tying up two people –
police office & control room - to perform a simple task.
全国呼叫建立时间
区域交换中心，全功能、全国覆盖
• 全功能广域覆盖
• 无缝连接:全国快速呼叫
• 无缝漫游: 用户漫游时保持呼叫
连接
×
During the introduction we already discussed the need for public safety organisations
to coordinate operations across large geographical areas. Dimetra IP allows for this
due to the wide area coverage capability of the system.
But mere coverage is not enough. Performance and functionality of the network need
to be maintained as users roam across the coverage area: Group and emergency calls
must be established with minimal delay. Dimetra IP uses a ”flat mesh” architecture,
with no need for calls to travel across multiple transit switches with considerable delays
as it is seen in traditional circuit switched networks. With Dimetra IP calls are set up in
fractions of a second no matter where in the network the call participants may be
located. We call this ”Seamless Connection”. In a coordinated drug bust, for
example, where multiple Police squads conduct a national raid, there is no time to wait
for a call to be set up on the communication system. Again, time is a critical factor.
Now, once a call is set up it is critical that communication is maintained, while users on
the call roam across the network. ”Seamless roaming” allows officers to conduct calls
in hot pursuit of suspects, without having to adjust radio settings or worrying about
whether their back up teams are in a different county. Motorola Dimetra IP is the only
TETRA system currently available to provide this functionality.
单站集群功能（LST）
• 基站用户登记
• 真正集群
• 控制信道备份
• 组呼（编组不变）
• 主叫显示
• 紧急呼叫
• 排队回呼
• 迟后加入
• 定时自动提示
• 自动恢复广区集群
机场B
机场A
链路故障概率比设备故障高，且设备有（热）备份。
金羊网-新快报和http://news.tom.com 2003年07月06日报道:
前天（7月4日）10时53分至12时26分，首都机场离港系统因发生设备
故障而瘫痪93分钟，无法为旅客办理登机手续。共有71个出港航班因
此发生延误，至少3000名旅客无法准时登机。有关方面在当天下午召
开的新闻发布会上称，此次事故是通信网络中的光通信接点机发生故
障造成的。首都机场离港系统前端在机场、后台在中航信。离港系统
的所有设备都是双备份的，只有与电信部门的接点机没有备份。据介
绍，这样的情况当天在中国其他机场也有发生。
网易报道：罗马尼亚小偷一夜卷走数百电缆机场瘫痪5小时
http://news.163.com 2005-03-15 08:22:20 英国媒体14日报道，最近
，罗马尼亚两名小偷来到首都布加勒斯一家机场，盗走300根31米长的
电缆，导致机场停电，而瘫痪了至少5个小时。当时，这两名小偷乘着
夜黑风高，偷偷潜入布加勒斯特一家机场的后勤中心，盗走其内300根
31米长的电缆。其后，原本灯火通明的机场瞬间变得漆黑一片，原本
由电子卡控制的所有大门也失去了功能，整个机场瘫痪了至少5个小时
。
开放IP 接口
第三方应TETRA 主机应智能
IP 交换网
电信网
公司
互联网
应用软件的增值解决方案可以平滑经济地接入
基
移动应
内部计算机网
IP交换和支持IP连接：接入各种应用和业务
Motorola has an open interface policy, that ensures that third party products and
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