Nortel DMS-100 Series Replacement Procedures page 949

8
Recommended NT6X21AD S1 DIP switch settings (Sheet 1 of 2)
Recommended
application
P-phone sets long
loop: 19-24dB
EML
P-phone sets
medium loop:
17-19dB EML
Note: dB=decibel, NL = non-loaded, Vpp=voltage peak to peak, EML= estimatedmeasured loss, as
defined in NTP 297-2011-180 BCS35 version 01.02
DMS-100 Family NA100 Card Replacement Procedures Volume 4 of 7 LET0015 and up
in an RSC-S (PCM-30) Model B LCME
e Pull the extractor away from the drawer until the card becomes unplugged
from its socket on the drawer backplane.
f Continue pulling the card with the extractor until the card is clear of the
shroud.
g Insert the card removed into the ESD container and store using local
procedures.
Replace the faulty card using the following substeps:
a Remove the replacement card from the ESD container.
If the line card suffix is
AA, AB, or AC
AD
b Make DIP switch changes to the new replacement NT6X21AD line card
to match the DIP switch settings of the card being replaced, or as defined
in the following table.
c Slide the card in the shroud guide slots toward the drawer backplane.
d Hold the front cover of the line drawer with your left hand to steady it.
e Grasp the top and bottom edges of the card with the fingers of your right
hand.
f Push the card toward the backplane until it plugs fully into the backplane
socket.
D/A voice S1 Balance S2
switch position switch position
ON OFF ON
-3.5d
0dB B NL
X
X
XPM card replacement procedures
Do
step c
step.b
Signaling level S3 and S4
Both
OFF ON
1.3Vp
9+2 p
X X
X
NT6X21
(continued)
Only Only Both
S4 ON S3 ON OFF
0.14Vp
0.8Vpp 0.6Vpp p
X
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