• 9600 baud
• 8 data bits
• no parity
• 1 stop-bit
• no flow control
Connecting a Management Ethernet Cable
When using the Ethernet Management port in the default mode (speed-auto and duplex-auto) the port operates
in the auto-MDI/MDI-X mode. The port automatically provides the correct signal connectivity through the
Auto-MDI/MDI-X feature. The port automatically senses a crossover or straight-through cable and adapts to
it.
However, when the Ethernet Management port is configured to a fixed speed (10, 100, or 1000 Mbps) through
command-line interface (CLI) commands, the port is forced to the MDI mode.
When in a fixed-speed configuration and MDI mode:
• 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. Statement
Warning
Installing and Removing SFP and SFP+ Modules
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M 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 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router. Changing an SFP quicker could result in
transceiver initialization issues that disable the SFP.
Caution
Installing the Router
49
Installing the Router
Connecting a Management Ethernet Cable
