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C881SRSTW-GN-A-K9
Cisco SRST881 ENet FXS - FXO Sec Router 802.11n FCC Comp
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C881SRSTW-GN-A-K9 is a compact integrated services router engineered with a fixed architecture that delivers robust performance for small to mid‑sized branch offices. It supports dual power options with redundant AC supplies and features a balance of WAN and LAN interfaces, ensuring dependable connectivity while integrating diverse services including VPN, firewall, voice, and video.
Built to support a range of routing protocols such as OSPF, EIGRP, RIP, and static routing, this device incorporates VPN features and basic modular expansion capabilities for integrated services. With a throughput capacity of up to 150 Mbps, built‑in firewall security, and remote management via SSH, Telnet, and SNMP, it is ideally suited for business environments requiring secure, high‑availability connectivity and optimized performance.
C881SRSTW-GN-A-K9 price is is available on request. Get immediate quote.
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In distributed enterprises, Cisco SRST881 switches to Survivable Remote Site Telephony (SRST) and PSTN fallback via built-in FXO/FXS when the WAN link to the central IP PBX fails. Outcome: continuous voice services with zero downtime, preserved customer support, and uninterrupted branch productivity.
Retail stores use SRST881’s integrated firewall, VLAN routing and 802.11n wireless to isolate point-of-sale terminals from guest networks while enforcing PCI-compliant encryption. Outcome: protected payment transactions, enhanced in-store Wi-Fi experience, and simplified network security management.
Event organizers and temporary sites deploy SRST881 for fast network setup using 802.11n wireless, 4G LTE failover and secure IPsec tunnels. The router’s FXO port also ensures PSTN voice continuity. Outcome: swift, reliable connectivity and voice services without fixed infrastructure dependencies.
To get the detailed certification, please go to the Compliance Center.
| C881SRSTW-GN-A-K9 |  CISCO886-SEC-K9 |  CISCO887-K9 |  CISCO877-M-K9 |  CISCO857W-G-E-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Modular | Fixed |
| Broadband | N/A | N/A | N/A | DSL | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC / CE | FCC / CE | FCC / CE | FCC, CE, RoHS |
| Connectivity Type | Wired / Wireless / Ethernet | Wired | Wired | Wired | Wired / Wireless |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | FCC / CE | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | N/A | N/A | N/A | NIM | N/A |
| Features | VPN / Firewall / IPv6 Compatible / NAT | VPN / IPv6 Compatible / Firewall / Syslog | VPN / NAT / QoS / Firewall | VPN / VoIP / IPv6 Compatible / Firewall / NAT | VPN / VoIP / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 128 MB | 128 MB | 256 MB |
| Form Factor | Desktop | Desktop | Desktop | Desktop | Desktop |
| Height | N/A | N/A | N/A | N/A | N/A |
| High Availability Support | Not Supported | Supported | Supported | Not Supported | Not Supported |
| Integrated Services | Voice / Video / N/A | Voice | Voice / Video / Security | Voice / Video / WAN Optimization | Voice |
| Interface Ports | RJ-45 / Combo Ports | RJ-45 | RJ-45 | RJ-45 / Modular Interface | 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 | 512 MB | 512 MB |
| Modular Slots Available | N/A | N/A | N/A | 1 Slot | N/A |
| Network Protocols | IPv4 / IPv6 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6, TCP/IP, UDP, ICMP |
| Power | 25 W | 35 W | 65 Watts | 65 Watt | 50 Watt |
| Power Source | AC Power Supply / Redundant | AC Power Supply | AC Power Supply | AC Power Supply, Redundant | AC Power Supply |
| Product Name | Cisco 881SRSTW-GN-A-K9 Integrated Services Router | CISCO886-SEC-K9 | CISCO887-K9 | CISCO877-M-K9 | CISCO857W-G-E-K9 |
| Product Type | Integrated Services Router | Branch Router | Enterprise Router | Integrated Services Router | Integrated Services Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH / Telnet / SNMP | Telnet / SSH / SNMP | CLI / SSH / Telnet / SNMP | Telnet / SSH | HTTP, HTTPS, SNMP, SSH |
| Routing Protocols | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | RIP / OSPF / EIGRP / BGP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | UL / CE | N/A | N/A | UL, CE |
| Speed/Capacity | Fast Ethernet | Gigabit | 100 Mbps | Fast Ethernet | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | FCC / CE | N/A | N/A | N/A |
| Throughput Capacity | 150 Mbps | 0.3 Gbps | 20 Mbps | 30 Mbps | 60 Mbps |
| Use Case | Business / Small Business / Enterprise | Enterprise | Enterprise Branch | Small Business / Branch Office | Small Business |
| VPN Support | IPSec / SSL VPN / N/A | IPSec VPN / SSL VPN | IPSec / SSL VPN / DMVPN / N/A | IPSec | IPSec / SSL VPN |
| WAN Configuration | Dual WAN | Dual WAN | WAN | Single WAN with Optional Modular Expansion | WAN |
| WAN Ports | 2 WAN | 2 WAN | 1 WAN | 1 WAN Port | 1 WAN |
| Weight | N/A | N/A | N/A | N/A | N/A |
| Wi-Fi Standard | WiFi 4 | N/A | N/A | N/A | WiFi 4 |
| Width | N/A | N/A | N/A | N/A | N/A |
| Wireless Support | Yes | No | No | No | Yes |
SRST881W-GN-A provides seamless FXS/FXO failover with stable 802.11n wireless. Keeps office voice and data reliable.
Cisco SRST881W-GN-A is easy to configure and ensures uninterrupted communications with dependable wireless performance.
Strong backup and wireless performance. Ideal for small office telephony and network continuity.
Reliable voice failover with stable network performance. Cisco quality ensures minimal downtime.
Efficient FXS/FXO router with wireless support. Keeps office operations smooth and secure.
The Cisco SRST881 (SKU C881SRSTW-GN-A-K9) is an integrated branch router with embedded SRST for high-availability VoIP, 802.11n wireless, security features and FCC compliance.
Key features include Survivable Remote Site Telephony (SRST), dual FXS/FXO voice ports, 802.11n wireless, integrated security (VPN, firewall, IPSec) and FCC compliance.
The SRST881 supports up to 12 concurrent G.711 VoIP calls in Survivable Remote Site Telephony (SRST) mode.
Yes, the SRST881 includes an integrated 2.4 GHz 802.11n radio delivering data rates up to 144 Mbps for wireless LAN access.
Built-in security includes a stateful firewall, IPsec VPN, secure management (SSH, SSL), intrusion prevention and URL filtering.
Yes, the Cisco SRST881 (C881SRSTW-GN-A-K9) meets FCC Part 15 Class B requirements for emission and interference control.
Use the Cisco IOS SRST software image, provision dial-peers for local call routing, configure TFTP to sync dial plan and verify voice port status.
The SRST881 offers one 10/100 Mbps Ethernet WAN port and supports DSL or cable modem via Ethernet uplink.
The SRST881 provides two FXS ports for IP phones and one FXO port for PSTN failover.
Yes, the SRST881 seamlessly integrates with Cisco Unified Communications Manager for centralized call processing and SRST fallback.
During WAN outages, SRST activates on the router, enabling local call processing and PSTN fallback via FXS/FXO ports.
The SRST881 operates on 12 VDC at 1.5 A, weighs 1.1 lb and measures 7.5” × 7.0” × 1.5”.
Upload the new IOS image via TFTP or USB and update the boot variable in ROMMON, then reload the router.
Management options include Cisco IOS CLI, Cisco Configuration Professional GUI, SNMPv2/v3 and embedded HTTP/HTTPS.
Cisco offers a one-year limited hardware warranty, with optional SMARTnet support contracts for extended coverage and 24×7 technical assistance.
Yes, the SRST881 supports up to five IPsec site-to-site VPN tunnels with AES and 3DES encryption.
The SRST881 is available through Cisco authorized partners, resellers and Cisco’s online storefront.