当与用户电话交换机（pbx）一起工作的voip解决方案加入时，内部通话通过pbx进入路由，而长途电话通过voip解决方案进入路由。
When a VOIP solution that works in conjunction with the PBX is added, internal calls are routed through the PBX and long distance calls are routed through the VOIP solution.
当与用户电话交换机（pbx）一起工作的voip解决方案加入时，内部通话通过pbx进入路由，而长途电话通过voip解决方案进入路由。
When a VOIP solution that works in conjunction with the PBX is added, internal calls are routed through the PBX and long distance calls are routed through the VOIP solution.
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