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External Alarm Inputs
External Alarm Inputs
The Cisco ASR 920 router supports four dry contact alarm inputs through an RJ-45 jack on the front panel.
• Normally Open—indicates that no current flows through the alarm circuit and the alarm is generated
Management Interfaces
The Cisco ASR 920 routers have the following management interfaces:
Management ENET Port
A single management copper ENET port supporting 10/100/1000Base-T operation is provided on the front
panel. It uses a standard RJ-45 jack.
Note
This is not a data plane port.
Note
This interface does not support Synchronous Ethernet Clocking.
TIA/EIA RS232 Console Port
The RS232 console port provides transmission (Tx), reception (Rx), and ground (Gnd).
Note
The RS232 console port is enabled only through the Cisco-designed cable adapter USB type A cable to RJ-45
adapter cable. To use this port, disable the flow control on the terminal.
USB Console
A single USB 2.0 Type-A receptacle is provided on the front panel of the Cisco ASR 920 router for providing
console access to ROMMON, Cisco IOS-XE and diagnostics. While it uses the Type-A connector, it operates
as a USB peripheral only for connection to an external host computer. This interface requires the use of a
Type-A (male) to Type-A (male) connector instead of a standard USB cable.
Note
Use of the USB console is mutually exclusive of the RS232 console port. This interface requires the use of a
Type-A (male) to Type-A (male) USB cable.
USB Mass Storage
A single USB 2.0 Type-A receptacle is provided on the front panel of the Cisco ASR 920 router for inserting
external USB mass storage devices, such as standard USB flash drives. This interface is used to load images,
load or store configurations, write logs, and so on. It supports operation up to 12Mbps.
Maximum memory supported in ROMmon is 8GB and in Cisco IOS is 16GB.
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Aggregation Services Router Hardware Installation Guide
6
when the current is flowing.
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Routers Overview
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