PCBS
21 May, 1999
2-46
2.4.3 NCU (USA)
Jumpers
Item
Description
JP5
JP6
These jumpers should be shorted when the machine is connected to a
dry line for back-to-back tests.
BR1
Also remove BR1 when the machine is connected to a dry line.
Ring Detect
RING
TIP
OHDISW
Hook0
Hook1
Ex Ring
JP5
Ex TDI
Ext. Tel
DP/Off-
H o o k
Detection
Current
S e n s o r
24V
C M L S W
RITONE
Q 6
Q 5
Relay
2 4 V
O H D I S W
JP6
T1
R1
TRXD
N C U
B R 1
H547D550.WMF