• Use a crossover cable to connect to an MDI port
• Use a straight-through cable to connect to an MDI-X port
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect
the Management Ethernet ports only to intra-building or unexposed wiring or cable. The intrabuilding cable
must be shielded and the shield must be grounded at both ends. The intra-building port(s) of the equipment
or subassembly must not be metallically connected to interfaces that connect to the OSP or its wiring. These
interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in
GR-1089-CORE) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is
not sufficient protection in order to connect these interfaces metallically to OSP wiring.
Caution
Installing and Removing SFP and SFP+ Modules
The Cisco ASR 920 Series Router supports a variety of SFP and SFP+ modules, including optical and Ethernet
modules. For information on how to install and remove SFP and SFP+ modules, see the documentation for
the SFP or SFP+ module at:
http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/prod_installation_guides_list.html
For information about inspecting and cleaning fiber-optic connections, see:
http://www.cisco.com/en/US/partner/tech/tk482/tk876/technologies_white_paper09186a0080254eba.shtml
We recommend that you wait for 30 seconds between the removal and insertion of an SFP on an interface
module. We recommend this to allow the transceiver software to initialize and synchronize with the Cisco
ASR 920 Series Router. Changing an SFP more quickly could result in transceiver initialization issues that
disable the SFP.
Caution
Connecting a USB Flash Device
To connect a USB flash device to the router, insert the memory stick in the USB port labeled USB MEM.
The Flash memory module can be inserted only one way, and can be inserted or removed regardless of whether
the router is powered up or not.
The following figure shows the USB port connector on the Cisco ASR 920 Series Router.
Figure 61: Flash Token Memory Stick
Removing a USB Flash Device
To remove and replace a USB flash token memory stick from and into a router, follow these steps:
Installing the Cisco ASR 920 Series Router
70
Installing the Cisco ASR 920 Series Router
Installing and Removing SFP and SFP+ Modules
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