Pagina
20
HI-PRO 280
A
Input volume adjusting trimmer (from doorphone to telephone)
B
Output volume adjusting trimmer (from telephone to doorphone)
C Bus ISDN T01 termination jumpers (resistance)
D Bus ISDN T02 termination jumpers (resistance)
Installation
Disconnect Hi-pro from the mains.
Unhook the right side of the lid and turn it down.
Open the remaining part of the lid unfastening the screw on top and
turn it down.
Remove jumpers in JP3 (H in picture page 13).
Insert the optional board in connectors: JP1, JP2, JP3, JP5 and JP9
making sure that all the pins are inserted into the slots.
If necessary remove bus termination jumpers (C and D in previous fig.).
Note: the termination resistances must be inserted only in the last
plug of the bus.
Reassemble the main part of the lid and tighten the screw.
Replace the right side of the lid .
Connect the mains.