ST0-78 Test Terminal Block is mounted on JPX188 Main Distribution Frame
and it is used for connection between jumper wires and internal exchange
lines. It is a normally closed-type contact. When the disconnection plug
is inserted into the test connection block, the internal cable and jumper
wire will be disconnected.

The test plug with cord can be used to test internal line and external
line independently. The protection plug can be used to label and protect
important or special subscriber line. Each Test Terminal Block is of
max capacity of 32 pairs.

Specifications:
1) Insulation Resistance ≥1000 MΩ
2) Dielectric Strength≥1000V(AC 50Hz for 1 minute), no spark-over and
no flying arc
3) Contact resistance between conductor and reed: ≤3mΩ
4) Contact resistance between reeds: ≤7mΩ
5) Conductor diameter range: 0.4mm-0.8mm
6) Pulling strength: ≥25N