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3.4.12 STBG4 (For France Only)

This current limiting board is for connecting loop start trunks in France. It includes the current limiting components and surge protection elements required by law.

No options bus lines are needed.

The slot X3 wiring is polarized.

The STBG4 channel is looped between TLA and the trunk.

Figure 3-103 STBG4 interfaces (S30817-Q934-A)

Table 3-85 STBG4 Contact Assignments

Contact 
Connector X3 
Connector X4 
Not assigned 
AL 1 
BL 1 
BL 1 
AN 1 
AL 2 
BL 2 
BL 2 
AN 2 
AL 3 
BL 3 
BL 3 
AN 3 
AL 4 
BL 4 
BL 4 
AN 4 
 
10 
Not assigned 
 

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