1. It is used for connecting and distributing cables between telephone exchange equipments and terminating cables.
2. Single-side operation，suitable to be used in narrow space requiring low capacity.
•The frame can be placed against the wall. Compact structure occupies little space which in turn lowers cost.
•Modules in the internal line side and external line side can be configured freely, and be packed together or separately.
•Flexible coding technique of the switch box can basically realize short patching.