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 and wireless LTE WAN connectivity. Service providers offering both managed Ethernet and wireless LTE 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.
Table 1. How the Cisco 900 Series ISRs Address Edge Networking Challenges
Business need | Features and descriptions |
High availability and business continuity | Redundant WAN connections for failover protection and load balancing ●Dynamic failover protocols such as Virtual Router Redundancy Protocol (VRRP, RFC 2338), Hot Standby Router Protocol (HSRP), and Multigroup HSRP (MHSRP) |
Consistent, high application performance levels | Can run multiple services simultaneously with no performance degradation |
Risk mitigation with multilevel security | Network perimeter security with integrated application inspection firewall ●Data privacy through high-speed IP Security (IPsec) Triple Data Encryption Standard (3DES) and Advanced Encryption Standard (AES) encryption ●Enforced security policy with intrusion prevention ●Security hardware acceleration ●FlexVPN ●Next-generation encryption for secure network communications systems, reliable for the next decade |
Feature consolidation for real estate, Capital Expenditures (CapEx), and management savings | Supports LAN connections |
Unified control of wired and wireless networks from a common console for streamlined operations | Simplifies and centralizes configuration and management of wireless and wireline devices |
Remote configuration and management to keep local IT staff lean | Supports separate console ports |
Table 2. Cisco 900 Series ISRs Ethernet and DSL only SKUs
Model | WAN interfaces | LAN interfaces | Integrated USB 2.0 |
C921-4P | 2 ports Gigabit Ethernet (GE) | 4-port GE managed switch | Yes |
C931-4P | 2 ports Gigabit Ethernet (GE) | 4-port GE managed switch | Yes |
C927-4P | 1 port GE and 1 VADSL (Annex A) | 4-port GE managed switch | Yes |
C926-4P | 1 port GE and 1 VADSL (Annex B/J) | 4-port GE managed switch | Yes |
C927-4PM | 1 port GE and 1 VADSL (Annex M) | 4-port GE managed switch | Yes |
Table 3. Cisco 900 Series ISRs LTE SKUs
Model | WAN | LAN switch (GE) | Integrated USB 2.0 | ||
GE | ADSL2/VDSL2+ | LTE (CAT4) | |||
C921-4PLTEGB | 2 | NA | YES | 4 | Yes |
C921-4PLTEAU | 2 | NA | YES | 4 | Yes |
C921-4PLTEAS | 2 | NA | YES | 4 | Yes |
C927-4PLTENA | 1 | 1 VA-DSL (Annex A) | YES | 4 | Yes |
C927-4PLTEGB | 1 | 1 VA-DSL (Annex A) | YES | 4 | Yes |
C927-4PLTEAU | 1 | 1 VA-DSL (Annex A) | YES | 4 | Yes |
C927-4PMLTEGB | 1 | 1 VA-DSL (Annex M) | YES | 4 | Yes |
C926-4PLTEGB | 1 | 1 VA-DSL (Annex B/J) | YES | 4 | Yes |
The Cisco 900 series Integrated Services Routers are the SOHO routers that offer unmatched throughput levels. They are available in fixed form factors. The Cisco 900 series is best suited for small and midsize businesses, enterprise branches and as customer premises equipment in managed services environments.
Table 1. Base models of the Cisco 900 series ISR
Model | Switch Ports | WAN Ports | Console Ports | DSL |
C921-4P | 4 | 2 | 1 | None |
C921J-4P | 4 | 2 | 1 | None |
C921-4PLTEGB | 4 | 2 | 1 | None |
C921-4PLTEAU | 4 | 2 | 1 | None |
C921-4PLTEAS | 4 | 2 | 1 | None |
C921-4PLTENA | 4 | 2 | 1 | None |
C926-4P | 4 | 1 | 1 | 1 |
C926-4PLTEGB | 4 | 1 | 1 | 1 |
C927-4P | 4 | 1 | 1 | 1 |
C927-4PM | 4 | 1 | 1 | 1 |
C927-4PLTEGB | 4 | 1 | 1 | 1 |
C927-4PMLTEGB | 4 | 1 | 1 | 1 |
C927-4PLTEAU | 4 | 1 | 1 | 1 |
C931-4P | 4 | 2 | 1 | None |
Table 2. LED Indicators for Cisco ISR 900 Series Routers
Port | LED Color | Description |
SYS | OFF | System is off |
Blink | Boot up phase or in ROM Monitor mode | |
Steady on | Normal operation | |
Amber(steady) | Thermal trip | |
Amber(blink) | ROMMON code signing verification failure | |
VPN OK | Green | At least one VPN session is active |
OFF | VPN not connected | |
LAN | Green(Solid) | LAN connection is established. |
Green (Blinking) | Data transmission is happening on the link. | |
OFF | LAN is not connected | |
WAN | Green(Solid) | WAN link is established |
Green (Blinking) | Data transmission is happening on the link. | |
OFF | WAN link is not connected. | |
DSL CD | OFF | Shut |
Green(Blinking) | Training, or no shut and cable disconnected. | |
Green (solid) | Trained | |
DSL Data | OFF | Shut |
Green(Blinking) | TX/RX Data | |
RSSI | Green (Solid) | Signal > –60 dBm Very strong signal |
Yellow | 60dBm > Signal > -75dBm Strong signal | |
Yellow(blinking) | 75dBm > Signal > -90dBm Fair signal | |
OFF | Signal < –90 dBm Unusable signal | |
SIM | OFF | No SIM |
Steady on | SIM present in slot | |
Blink | TXD/RXD data |
Table 1. Cisco 900 Series Integrated Services Routers Ordering Information
Part number | Product description |
Integrated services routers | |
C921-4P (C921-4PLTEGB, C921-4PLTEAS and C921-4PLTEAU) | Cisco 921 Gigabit Ethernet security router with internal power supply |
C931-4P | Cisco 931 Gigabit Ethernet security router with internal power supply |
C927-4P (C927-4PLTENA, C C927-4PLTEGB and C927-4PLTEAU) | Cisco 927 Gigabit Ethernet security router with VDSL/ADSL2+ Annex A |
C927-4PM (C927-4PMLTEGB) | Cisco 927 Gigabit Ethernet security router with VDSL/ADSL2+ Annex M |
C926-4P (C926-4PLTEGB) | Cisco 926 Gigabit Ethernet security router with VDSL/ADSL2+ Annex B/J |
— Cisco C921-4P and C931-4P are supported only on Cisco IOS Software Release 15.8(3)Mb and later — Cisco C927-4P, C927-4PM, C926-4P, and C921-4PLTE *, C926-4PLTE *, C927-4PLTE * are supported only on Cisco IOS Software Release 15.8(3)M1 and later | |
Mount kits | |
ACS-900-RM-19(=) | Rack-mount kit for 900 Series ISRs [Only for C921-4P, C931-4P, and C921-4PLTEXX] |
ACS-900-DM(=) | Under-the-desk mount kit for all 900 Series ISRs [Only for C921-4P, C931-4P, and C927-4PLTEXX, C927-4PMLTEXX, and C926-4PLTEXX ] |
