American Telecom AM64/128A - Manual (Page 44)

AM64/128A User Manual
A-5
The function of the links is as follows:
J1 Transmission disable
This link is always left in position 1-2
J11 Watch dog enable
This link is always left in position 1-2
J21 This connects the supply earth to the circuit ground in position 1-3
The circuit ground is floating in position 1-2
WARNING
Only authorised personnel can be allowed to open the Line Terminat ing Unit case to change the
link settings. Misuse or any modifications carried out to this unit other than in accordance with
the instructions supplied, will in validate both the guarantee and CE approval.