Coaxial Cables; Power Injector - Cisco BR1400 Deployment Manual

Coaxial Cables

Cat 5
Bridge

Power Injector

Port 0
Port 1
Power Injector Ports
Figure 38.
Please note that the switch in Power Injector is unmanageable and unprogrammable. These switch
ports are permanently set to auto negotiation and cannot be changed.
A duplex mismatch can be caused by misconfiguration between the internal LAN, power injector
and the ODU. It is possible to set the Ethernet port of the ODU for full duplex, half duplex or auto
mode through IOS CLI.
If the ODU Ethernet interface is set to full duplex mode then the power injector will not be able to
detect the duplex mode and will fall back to half duplex as defined in IEEE 802.3 standard. That
will cause a duplex mismatch condition between the ODU and the power injector. In order to
avoid that, the ODU Ethernet interface needs to be set to auto or half duplex mode.
The same thing can happen at the Ethernet interface between the PILR and internal LAN. If the
network device that PILR is connected does not support Auto-negotiation or not configured to be
in auto negotiation mode, duplex mode on that device needs to be configured to be in half duplex
mode.
For details refer to the Application note for the Power Injector on the WNBU website.
http://wwwin.cisco.com/eag/wnbu/tech_resources/app_notes.shtml
6.13 Weather proofing the connectors
After you have aligned the bridges and configured everything physically, it is time to weatherproof
the connectors. Failure to weatherproof the coaxial power injector cables and antenna connector
(when using the non-integrated antenna) can result in failure over time due to corrosion and/or
water ingress.
Tip: It is always better to weatherproof your connectors on the nice warm day you installed
the bridge then have to troubleshoot the link in the dead of winter because of corrosion or
water problems that resulted from your failure to do it right the first time.
6.13.1 Recommended Practices for weatherproofing the RF connectors
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
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