Cisco C921-4P User Manual

Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement
1030.
Warning
Ultimate disposal of this product should be handled according to all national laws and regulations. Statement
1040.
Warning
Prevent Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It can occur if electronic
printed circuit cards are improperly handled and can cause complete or intermittent failures. Always follow
ESD prevention procedures when removing and replacing modules:
• Ensure that the router chassis is electrically connected to ground.
• Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to an
unpainted surface of the chassis frame to channel unwanted ESD voltages safely to ground. To guard
against ESD damage and shocks, the wrist strap and cord must operate effectively.
• If no wrist strap is available, ground yourself by touching a metal part of the chassis.
For the safety of your equipment, periodically check the resistance value of the anti-static strap. It should be
between 1 and 10 megohms (Mohm).
Caution
General Site Requirements
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
Connect the Chassis to Earth Ground—To reduce the risk of electric shock, the chassis of this equipment
needs to be connected to permanent earth ground during normal use. Statement 445
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the
protective device is rated not greater than: 20A. Statement 1005
Warning
Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement 1018
Warning
Hardware Installation Guide for the Cisco 900 Series Integrated Services Router
10
Prepare for Router Installation
Prevent Electrostatic Discharge Damage

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