365-575-102 Detailed Level Procedure: DLP-500
Issue 8.0, July 2002 Page 1 of 4
Make Manual Optical Loopback at FT-2000 Network
Element
Overview: This procedure requires the FT-2000 network element to be out of
service.
!
CAUTION:
Use a static ground wrist strap whenever handling circuit packs or
working on an FT-2000 network element to prevent electrostatic
discharge damage to sensitive components.
1. Remove the shelf cover from one high-speed shelf.
Reference: DLP-511
2. For each OC-48 line to be looped back, obtain a lightguide jumper (package
label FS1E-E-02) and a 20-dB loss lightguide buildout, or equivalents. (It is
possible to connect another LBO to an existing LBO to obtain a total of 20-dB
provided the LBOs do not physically interfere with the shelf cover when
closed.) Table A shows additional buildouts that are available. Table B shows
the buildout types that are compatible with different codes of the TRMTR and
cks. Figure 1 shows optical line loopback connections.
Figure 1 – Loopback Connections
OUT
IN
tpa 821266/01
TRMTR
1or1W
RCVR
1or1W
TRMTR
Por1E
RCVR
Por1E
20-dB
LBO
OUT
IN
20-dB
LBO
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