Cisco C921-4P User Manual

The default parameters for the console port are 9600 baud, 8 data bits, 1 stop bit, and no parity. The console
port does not support hardware flow control. For detailed information about installing a console terminal, see
the Connecting to a Console Terminal or Modem section.
For cable and port pinouts, see the Cisco Modular Access Router Cable Specifications document available
on cisco.com.
Console Port Considerations
The router includes an asynchronous serial console port. The console ports provide access to the router using
a console terminal connected to the console port. This section discusses important cabling information to
consider before connecting the router to a console terminal or modem.
Console terminals send data at speeds slower than modems do; therefore, the console port is ideally suited
for use with console terminals.
Preparing for Network Connections
When setting up your router, consider distance limitations and potential electromagnetic interference (EMI)
as defined by the applicable local and international regulations.
Network connection considerations are provided for:
See the following online document for more information about network connections and interfaces:
• Cisco Modular Access Router Cable Specifications
Ethernet Connections
The IEEE has established Ethernet as standard IEEE 802.3. The routers support the following Ethernet
implementations:
• 1000BASE-T—1000 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair
(UTP) cable. Supports the Ethernet maximum length of 328 feet (100 meters).
• 100BASE-T—100 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair
(UTP) cable. Supports the Ethernet maximum length of 328 feet (100 meters).
• 10BASE-T—10 Mb/s full-duplex transmission over a Category 5 or better unshielded twisted-pair (UTP)
cable. Supports the Ethernet maximum length of 328 feet (100 meters).
See the Cisco Modular Access Router Cable Specifications document on Cisco.com for information about
Ethernet cables, connectors, and pinouts.
Required Tools and Equipment for Installation
You need the following tools and equipment to install and upgrade the router and its components:
• ESD-preventive cord and wrist strap
• Number 2 Phillips screwdriver
• Phillips screwdrivers: small, 3/16-in. (4 to 5 mm) and medium, 1/4-in. (6 to 7 mm)
• Screws that fit your rack
Hardware Installation Guide for the Cisco 900 Series Integrated Services Router
14
Prepare for Router Installation
Console Port Considerations

Cisco C921-4P Specifications

General

Switch type	Managed
Quality of Service (QoS) support	Yes
USB 2.0 ports quantity	1
Basic switching RJ-45 Ethernet ports type	-
Basic switching RJ-45 Ethernet ports quantity	4
10G support	No
Networking standards	IEEE 802.1D
Product color	Black
Electromagnetic compatibility	47CFR, AS/NZS CISPR22 2, CISPR22, EN55022, ICES003, EN61000-3-2, KCC, EN55024, KN24
Flash memory	2048 MB
Internal memory	1024 MB
MAC address table	- entries
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	5 - 95 %
Security algorithms	802.1x RADIUS
Harmonized System (HS) code	85176990

Weight and Dimensions

Depth	241.3 mm
Width	228.6 mm
Height	43.2 mm
Weight	1200 g