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C881SRSTW-GN-E-K9
Cisco SRST881 ENet FXS - FXO Sec Router 802.11n ETSI Comp
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C881SRSTW-GN-E-K9 is a fixed architecture router that combines essential network functions in a compact design. It provides versatile power options via an AC power supply with support for redundancy, multiple WAN and LAN interfaces including a dedicated 10/100 Ethernet WAN port and four 10/100 Ethernet LAN ports, integrated services for voice, video, and WAN optimization, and expansion capabilities through EHWIC slots for added functionality.
C881SRSTW-GN-E-K9 delivers robust VPN security with IPSec and SSL support, achieving up to 100 Mbps throughput with built-in QoS and firewall features to safeguard network performance and reliability. Its high availability and performance are ideally suited for small business and enterprise branch deployments that require secure remote connectivity and flexible, integrated services.
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In a multi-site enterprise, the C881SRSTW-GN-E-K9 (Cisco SRST881 ENet FXS-FXO Sec Router 802.11n ETSI Comp) provides automatic PSTN fallback and wired/wireless WAN failover at a remote office. When the MPLS link drops, the integrated FXS/FXO ports instantly rehome IP telephony to local analog trunks and Wi-Fi 802.11n ensures uninterrupted data access. Benefit: zero downtime for voice calls and critical applications, maintaining productivity and customer service SLAs.
A retail chain deploys the Cisco SRST881 ENet FXS-FXO Sec Router 802.11n ETSI Comp at each outlet to segregate point-of-sale traffic, guest Wi-Fi, and voice emergency lines. The router’s VPN, firewall and IDS/IPS modules enforce PCI DSS and ETSI security standards, while FXS ports connect legacy tills and FXO ports link backup PSTN. Benefit: fast, PCI-compliant checkout processes with end-to-end encryption, simplified management and built-in voice redundancy.
Event organizers leverage the C881SRSTW-GN-E-K9 to deploy pop-up networks at trade shows, concerts or conferences. Its dual Gigabit Ethernet, 802.11n access point and FXS/FXO interfaces provide secure Wi-Fi for attendees, VoIP call management and analog line backup over PSTN. Benefit: rapid, temporary network rollout with enterprise-grade security, uninterrupted voice services and compliance with ETSI radio regulations.
To get the detailed certification, please go to the Compliance Center.
 C881SRSTW-GN-E-K9 |  CISCO881G-G-K9 |  CISCO851W-G-A-K9 |  CISCO881GW-GN-A-K9 |  CISCO881GW-GN-E-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | DSL / Cable / N/A | N/A | N/A |
| Built-in Security Features | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention / VPN | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention | Firewall / Intrusion Prevention / VPN |
| Compliance Standards | FCC, CE | FCC, CE, UL | IEEE 802.3, IEEE 802.11b/g | FCC / CE | FCC / CE / UL |
| Connectivity Type | Wired / Wireless | Wired | Wired / Wireless | Wired | Wired / Wireless |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 Ethernet | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | N/A | EHWIC | N/A |
| Features | VPN, Firewall, NAT, QoS, Routing, Switching | VPN / IPv6 Compatible / Firewall / Voice / Video | VPN, Firewall, Integrated Wireless, VoIP | VPN, Firewall, NAT, QoS, IPv6 | VPN / Firewall / IPv6 Compatible / Integrated Security |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 128 MB | 128 MB | 256 MB |
| Form Factor | Rack-mount / Desktop | Desktop | Desktop | Desktop | Desktop |
| Height | N/A | N/A | N/A | N/A | N/A |
| High Availability Support | Supported | Not Supported | Supported | Supported | Not Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice / Data | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45, SFP | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 512 MB |
| Modular Slots Available | 2 Slots | 1 Slot | N/A | 1 Slot | N/A |
| Network Protocols | IP, TCP, UDP, ICMP | IPv4, IPv6 | TCP/IP, UDP, ICMP | OSPF, EIGRP, RIP, BGP | IPv4 / IPv6 |
| Power | 45 Watt | 65 W | 65 Watt | 48W | 34 Watt |
| Power Source | AC Power Supply / Redundant | AC Power Supply | AC Power Supply / DC Power Supply / Redundant | AC Power Supply | AC Power Supply |
| Product Name | Cisco C881SRSTW-GN-E-K9 Integrated Services Router | CISCO881G-G-K9 | CISCO851W-G-A-K9 | CISCO881GW-GN-A-K9 | CISCO881GW-GN-E-K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH, Telnet, SNMP | CLI, SNMP, HTTP, HTTPS | Telnet, SSH, SNMP | CLI / Web-based | CLI / SSH / SNMP / HTTPS |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing |
| Safety | RoHS | N/A | N/A | N/A | N/A |
| Speed/Capacity | 100 Mbps | N/A | 100 Mbps | 100 Mbps | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | ITU-T | N/A | N/A | N/A | N/A |
| Throughput Capacity | 100 Mbps | 0.045 Gbps | 100 Mbps | 50 Mbps | 0.05 Gbps |
| Use Case | Small Business / Enterprise Branch | Small Business / Enterprise | Enterprise / Small Business | Small Business / Enterprise | Small Business / Enterprise |
| VPN Support | IPSec / SSL | IPSec / SSL VPN / GRE / DMVPN / FlexVPN / N/A | IPSec | IPSec / SSL VPN | IPSec / SSL VPN |
| WAN Configuration | WAN | WAN | WAN | WAN | WAN |
| WAN Ports | 1 WAN | 1 WAN | 1 WAN | 1 WAN | 1 WAN |
| Weight | N/A | N/A | N/A | N/A | N/A |
| Wi-Fi Standard | 802.11b/g/n | N/A | WiFi 4 (802.11g) | N/A | WiFi 4 |
| Width | N/A | N/A | N/A | N/A | N/A |
| Wireless Support | Yes | No | Yes | No | Yes |
Reliable SRST router with solid voice failover support. Wireless performance is stable, making it ideal for branch offices needing voice continuity.
Cisco SRST881 delivers dependable routing and voice services. Easy to manage and performs well in distributed office environments.
Strong SRST functionality with consistent uptime. A good solution for offices relying on IP telephony backup.
Stable wireless and reliable voice routing. Cisco quality shows in long-term performance.
Well-suited for branch voice deployments. Performance has been smooth with minimal issues.
The Cisco SRST881 ENet FXS-FXO Secure Router 802.11n ETSI (SKU: C881SRSTW-GN-E-K9) is a compact branch-office gateway combining Layer 3 routing, integrated 802.11n wireless LAN, FXS/FXO voice-port support and enterprise-grade security in one appliance.
Key features include dual Fast Ethernet LAN/WAN ports, integrated FXS/FXO for analog voice failover, 802.11n AP, Cisco IOS firewall, IPsec VPN, Stateful Inspection, and Secure Router SRST fallback for uninterrupted voice services.
The Cisco SRST881 provides two RJ-45 Fast Ethernet ports (10/100 Mbps) and two modular voice slots supporting one FXS and one FXO port for PSTN or PBX connectivity.
Yes. The SRST881 includes an integrated dual-band 802.11n access point delivering up to 300 Mbps aggregate throughput for secure, high-performance wireless LAN access.