Manual

1X UBS Macro B T S FRU Unbalanced E1 Daughter Card
Unbalanced E1 Daughter Card
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Unbalanced E1 Daughter Card Description
The optional E1 daughter card is located on the front panel of the S SI.
F or E1 daughter card location and connector identification, refer to Figure 1 -7 S SI front panel
details on page 1 - 35 .
The E1 daughter card has a 37 -pin connector on the bottom of the card. This connector plugs
into the SP AN 37 -pin connector on the front panel of the S SI.
The E1 daughter card is secured to the S SI front panel via four corner screws.
The E1 daughter card is passive and does not require DC operating power . The circuitry on
the E1 daughter card transforms 75–Ohm unbalanced span line I/O to 100–Ohm balanced
S SI span line I/O .
The E1 daughter card supports up to eight span lines. It has 16 BNC connectors, 2 per span;
RX and TX.
System impact/considerations
P erforming this replacement procedure will cause BTS downtime and impact call
processing.
The E1 daughter card is non -redundant. Alarms will be generated during the E1 daughter
card replacement procedure.
The E1 daughter card is hot swappable.
Call traffic processing through the site will be interrupted by the E1 daughter card replacement
procedure.
Table 6 -4 E1 Daughter Card R eplacement Conditions
FRU
Ref Designator What to Shutdown...
Unbalanced E1
Daughter Card
E1 Daughter Card Shutdown site signaling functions.
68P09283A64 -3 6 -9
FOA SEP 2007