Nortel DMS-100 Series Replacement Procedures page 940

1-908 XPM card replacement procedures
NT6X21
in an RSC-S (PCM-30) Model A LCME
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
297-8021-547 Standard 14.02 May 2001
a Slide a card shroud over the card to be removed and an adjacent card. If
there is not an adjacent card on either side, do not use the card shroud.
b Grasp the edge of the card with a line card extractor at a point midway
between the top and bottom edges. Hold the extractor in your right hand.
c Squeeze the handles of the extractor together to grasp the card tightly.
d Hold the front cover of the line drawer to steady it using your left hand.
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.
D/A voice S1 Balance S2
switch position switch position
ON OFF ON
-3.5d
0dB B NL
X
X
(continued)
Do
step c
step b
Signaling level S3 and S4
Both
OFF ON
1.3Vp
9+2 p
X X
X
Only Only Both
S4 ON S3 ON OFF
0.14Vp
0.8Vpp 0.6Vpp p
X