User's Manual Part 2

A
obr3650_ml_01_sd Approved: C.W.
A-1
APPENDIX
A1 Molex® Backshell Installation
A defect was detected with the Ethernet terminating end of the Molex®backshell packaged with the OBR3650. The
terminating modular plug allowed the shielding wire to be improperly grounded, thus making the cable susceptible to
radiated interference. Without proper grounding, the presence of interfering radiation can cause the loss of data packets
between the OBR base station and the WES800.
To fix this problem, Vecima recommends reworking the termination of the Ethernet cable using the JMRJ45S-15
modular plug and properly grounding the cablefeed. The cable termination can be repaired in the field at the tower site.
Once the Ethernet cable termination is repaired, the cable feed will no longer be susceptible to interfering radiation and
the data will be secured.
Figure A-1 JMRJ45S-15 Modular Plug
NOTE
Other than the risk of data loss due to interfering radiation, there is no safety issues concerning the connector
that came with the OBR3650. Where loss of data due to the radiating interference is not a concern, reworking
the terminating end with the JMRJ45S-15 is only necessary as a precaution.
If using a pre-made cable assembly (such as a CAT5CABLE/OD/25, CAT5CABLE/OD/50, CAT5CABLE/OD/75
or CAT5CABLE/OD/100 from Vecima Networks), then the process described in this document is not necessary
CAUTION
Before attaching the backshell, it is highly recommended that the user read through
this entire appendix to become familiar with all of the steps involved to ensure that
none are missed.