toll switching meaning in English

长途交换

Toll switching trunk
长途交换干线
We installed standalone exchanges in the press center that were equipped with pstnisdn interfaces to provide such services as international switching , toll switching , local hubbing and local switching . the international switching capacity reached 30 , 000 circuit ports , and the toll switching capacity amounted to 126 , 000 circuit ports
我们专门在新闻中心设立了独立的交换机，采用ＰＳＴＮＩＳＤＮ业务接口，分别提供国际交换、长途交换、本地汇接和本地交换等业务，其中国际交换容量达到３万路端，长途交换达到12