Cisco C921-4P User Manual

SKUPower Supply
C921J-4P
C926-4P
C927-4P
C927-4PM
External
Do not hang the Power Supply Unit (PSU) from the power socket. Place it on a surface.
Note
Check the power at your site to ensure that you are receiving power that is free of spikes and noise. Install a
power conditioner if necessary
Note
Table 5: Power Requirements for Cisco 900 Series ISRs
Output RatedInput RatedSKU modelsPower Source
12VDC, 1.5A100-240V, 0.5A• C921J-4P18W AC External Power
Supply
(PWR-18W-AC(=))
12VDC, 2.5A100-240V, 1.0A• C926-4P
• C927-4P
• C927-4PM
30W AC External Power
Supply
(PWR-30W-AC(=))
Network Cabling Specifications
The following sections describe the cables and thee specifications required to install Cisco 900 Series ISRs:
Console Port Connections
The Cisco 900 ISR has both EIA/TIA-232 asynchronous (RJ-45) and USB2.0 compliant serial console ports.
The console ports do not have any hardware flow control. Shielded USB cables with properly terminated
shields are recommended.
EIA/TIA-232
Depending on the cable and the adapter used, this port appears as a DTE or DCE device at the end of the
cable.
Hardware Installation Guide for the Cisco 900 Series Integrated Services Router
13
Prepare for Router Installation
Network Cabling Specifications

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