E.164和国际呼叫路由

此博客将讨论思科开始完全支持Cisco Unified Communications Manager（CUCM）7.0的一些用途。+角色出现在国际上出售的许多GSM手机上，但无法从基于软件的Cisco IP电话的硬件拨打。当A +在拨号之前预先装配时，运营商将呼叫识别为未经国家特定国际运营商拨号字符串的国际电话。美国的国际电话通常要求将011的前缀被认为是国际呼叫，雷竞技比分而来自德国的呼叫使用00数字前缀字符串。这两个拨号前缀都可以用A +替换为指示国际呼叫，如下例所示：没有E.164支持的来自美国到德国的电话需要以下拨号数字：011 49 40 4589555同一款手机雷竞技比分调用E.164支持结果在以下拨打的数字中：+ 49 40 4589555 Cisco手机不支持拨打+字符的用户，但+字符可用于快速拨号。SIP中继线和MGCP网关支持E.164拨号计划中使用的+字符。H.323网关支持Q.931网络（吨）信令中发送的国际编号计划类型，但H.323网关不支持呼叫或被叫方号码中的+字符。Cisco Unified Communication Manager E.164在7.0和更高版本中支持包括以下元素：路由模式（RP）翻译模式（TP）Hunt Pilot（HP）目录号（DN）呼叫和被称为派对转换外接电话号码掩码CUCM已经长久了supported the + character in the regular expression context which indicates the previous digit repeated one or more times (e.g. 9+ equals 99 or 999999). The back slash character (\) is used in many elements in CUCM to override the default regular expression behavior CUCM has typically used. The following route pattern will route calls for any pattern that begins with the + character: \+! The exclamation point (!) usage in CUCM indicates one or more dialed digits to match on any dial string. Exclamation points are typically used in International dial plans due to their variable length nature. The E.164 standard supports dial strings up to 15 digits in length. Feel free to share any experiences you may have had with International dial plans.