公开(公告)号：US5812655A

公开(公告)日：1998-09-22

申请号：US723748

申请日：1996-09-30

申请人： Eddie L. Pickeral ,  Timothy A. Morgan

发明人： Eddie L. Pickeral ,  Timothy A. Morgan

IPC分类号： H04M3/42 ,  H04M15/00 ,  H40M3/42 ,  H40M3/00 ,  H40M7/00 ,  H40M15/06

CPC分类号： H04M15/08 ,  H04M3/42229 ,  H04M15/00 ,  H04M2215/62

摘要： A flexible service access code (FLEX SAC) permits originating callers to dial up to a fifteen-digit extension in place of a traditional service access code (SAC), such as for example a "700", "800", and "900" extension followed by a seven-digit extension. In addition to providing the originating caller, the destination caller, and the long distance carrier greater flexibility in the digits dialed for a SAC call, FLEX SAC permits routing on private trunks and remote access trunks, as well as the shared access trunks conventionally used for SAC calls. If the switch supports FLEX SAC calls, a FLEX SAC table (pertaining to the originating trunk group over which the call was routed) is parsed to find the called number. If the called number is found in the FLEX SAC table, additional fields indicating ANI screening, OLI screening, external routing, and the transaction group are parsed in the relevant FLEX SAC table. If either the OLI or the ANI fields indicate that OLI or ANI screening is to be performed, respectively, then an OLI or an ANI table for the switch is parsed to determine whether the call should be blocked, because a call from the originating caller is not supported by the switch. If the external routing field indicates an external routing table must be used to route the call, the external routing table is queried using the called number and the value of the transaction group field, which defines the call type to the external routing table. If the called number is not found in the FLEX SAC table, or external routing is not supported for the call, or a response is not received from the external routing table, then the call is routed using an in-switch translation table.

摘要翻译： 灵活的服务访问代码（FLEX SAC）允许发起呼叫者拨打一个十五位数的分机来代替传统的服务访问码（SAC），例如“700”，“800”和“900” 扩展名为7位数的扩展名。 FLEX SAC除了提供始发呼叫者，目的主叫方和长途运营商在SAC呼叫拨打的数字中更大的灵活性外，还允许在专用中继线和远程接入中继线上进行路由，以及常规用于 SAC电话。 如果交换机支持FLEX SAC呼叫，则会解析一个FLEX SAC表（属于发起呼叫路由的始发中继组），以查找被叫号码。 如果在FLEX SAC表中找到被叫号码，则在相关的FLEX SAC表中解析附加表示ANI筛选，OLI筛选，外部路由和事务组的字段。 如果OLI或ANI字段分别表示要执行OLI或ANI筛选，则解析用于交换机的OLI或ANI表，以确定呼叫是否应被阻止，因为来自始发呼叫者的呼叫是 不支持交换机。 如果外部路由字段指示必须使用外部路由表来路由呼叫，则使用被叫号码和事务组字段的值查询外部路由表，该字段定义了外部路由表的呼叫类型。 如果在FLEX SAC表中没有找到被叫号码，或者呼叫不支持外部路由，或者没有从外部路由表接收到响应，则使用in-switch转换表路由该呼叫。