Nortel DMS-100 Series Maintenance Manual page 512

12-164 Star Remote System card replacement procedures
NTTR75
in a STAR
(continued)
FSP front panel
0.75 A Alarm battery supply (ABS)
0.75 A, –48 V to LEDs
.75 A, ringing
voltage to line
drawers
0 1 8 9 18 19 26 27
ABS MINOR MAJOR CRITICAL
RCP0
RCP1
Phone 0 Phone 1
RS232
–48VA
ABS
BRTN
Note: PS00 is the power supply in slot 3.
PS01 is the power supply in slot 5.
PS10 is the power supply in slot 20.
PS11 is the power supply in slot 18.
TALKA is the breaker for talk battery A feed.
TALKB is the breaker for talk battery B feed.
9
10
11
297-8353-550 Standard 05.01 March 2001
1.33 A, –48 V to
UMP0 and UMP1
1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18
–48 V
+15 V
+5 V
–48VB
WARNING
Static electricity damage
Wear a wrist strap connected to the wrist strap grounding
point on the FSP while handling cards. This precaution
protects the cards against damage caused by static electricity.
Use a slot screwdriver to unscrew the two screws located in the upper left-
and right-hand corners of the FSP front panel.
Swing the FSP front panel downward to expose the interior of the FSP and
the cards located on the back of the FSP front panel.
With the FSP front panel open, locate the NTTR74 alarm card. Use the
following diagram to assist you.
Ring 0 for DMS 100, Slot 1
PS01 Slot 5
PS00, Slot 3
7.5 A, –48V to line
drawers
3 A, +15 V to line
drawers
2 A, +5 V to line
drawers
PS11, Slot 18
PS10 Slot 20
Ring 1 for DMS 100, Slot 22
Talk A
Talk B