The Cisco® 900 Series Integrated Services Routers (ISRs) combine Internet access, comprehensive security, and wireless services in a single high-performance device that is easy to deploy and manage. They are well suited for deployment as Customer Premises Equipment (CPE) in enterprise small branch offices and in service provider managed-service environments. Product overview The Cisco 900 Series ISRs deliver integrated security and threat defense, protecting networks from both known and new Internet vulnerabilities and attacks. These powerful, fixed-configuration routers provide secure broadband and Metro Ethernet connectivity. Service providers offering managed Ethernet WAN services can deploy them in customer locations as CPE. Centralized and remote management capabilities are available through web-based tools and Cisco IOS® Software for full visibility and control of network configurations at the remote site. The 900 Series ISRs simplify the deployment of Ethernet WAN services, with end-to-end Operations, Administration, and Maintenance (OA&M), Service-Level Agreement (SLA) monitoring and verification, and configuration management. The Cisco 900 Series ISRs come with a 4-port managed switch, providing LAN ports to connect multiple devices. Figures 1 and 2 show the C921-4P and C926-4P models.

Ports & interfaces
Basic switching RJ-45 Ethernet ports quantity	4
USB 2.0 ports quantity	1
Weight & dimensions
Width	228.6 mm
Depth	241.3 mm
Height	43.2 mm
Weight	1.2 kg
Power
Power supply included	Y
Number of power supply units	1
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Operational conditions
Operating temperature (T-T)	0 - 50 °C
Storage temperature (T-T)	-40 - 70 °C
Operating relative humidity (H-H)	5 - 95%
Protocols
Management protocols	Telnet, Simple Network Management Protocol Version 3 (SNMPv3), Secure Shell (SSH) Protocol, CommandLine Interface (CLI), and HTTP management
Network
Networking standards	IEEE 802.1D
10G support	N
IP routing	Y
Link aggregation	Y
Rate limiting	Y
VLAN support	Y
Security
Access Control List (ACL)	Y
IGMP snooping	Y
Security algorithms	802.1x RADIUS
Management features
Switch type	Managed
Quality of Service (QoS) support	Y
Design
Rack mounting	N
Stackable	N
Product colour	Black
LED indicators	Y
Electromagnetic compatibility	47CFR, AS/NZS CISPR22 2, CISPR22, EN55022, ICES003, EN61000-3-2, KCC, EN55024, KN24
Power over Ethernet (PoE)
Power over Ethernet (PoE)	N
Performance
Internal memory	1024 MB
Flash memory	2048 MB
Logistics data
Harmonized System (HS) code	85176990