United States$5,000,000+
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Sophia Lewis
5
Reliable 1861W with strong SRST and CME features. Voice and data run smoothly across the office.
C1861W-SRST-B/K9
1861,WLAN,8-user SRST/CME,4FXS,2BRI,8xPOE,SP Svcs,HWIC slot
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C1861W-SRST-B/K9
- Description:
- 1861,WLAN,8-user SRST/CME,4FXS,2BRI,8xPOE,SP Svcs,HWIC slot
- Rating:
Added to cart 28 times recently
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- Brand:
- Cisco
- GTIN:
- 882658208157
- Condition:
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C1861W-SRST-B/K9 Overview
C1861W-SRST-B/K9 is built on a fixed, integrated architecture with an AC power supply design that supports dual WAN interfaces and four LAN Ethernet 10/100 ports. It is equipped with modular expansion capabilities via a NIM slot and integrates advanced voice and video services for seamless enterprise connectivity.
C1861W-SRST-B/K9 supports robust VPN features such as IPSec, SSL VPN, DMVPN, and GRE, delivering up to 0.085 Gbps throughput along with redundancy and high availability support. Its optimized performance, stateful firewall protection with intrusion prevention and malware protection, and remote management via SSH, Telnet, and SNMP make it ideally suited for business and small business branch deployments.
C1861W-SRST-B/K9 price is is available on request. Get immediate quote.
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C1861W-SRST-B/K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / DMVPN / GRE
- Power Source
- AC Power Supply
- Routing Protocols
- OSPF / BGP / EIGRP / RIP / Static Routing
- Broadband
- N/A
- Architecture
- Fixed
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 WAN
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100
- Wi-Fi Standard
- WiFi 4
- Connectivity Type
- Wired / Wireless
- Network Protocols
- IPv4, IPv6
- Remote Management
- SSH, Telnet, SNMP
- Compliance Standards
- FCC, CE, UL
- Wireless Support
- Yes
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN, Firewall, Integrated Services, IPv6 Compatible
- Use Case
- Business / Small Business
- Management
- Managed
- Form Factor
- Desktop
- Integrated Services
- Voice, Video
- High Availability Support
- Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 0.085 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall, Intrusion Prevention, Malware Protection
- Expansion Slots
- NIM
- Modular Slots Available
- 2 Slots
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 256 MB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45
- Power
- 40W
- Device Type
- Router
- Product Name
- Cisco 1861 Wireless Services Router
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
C1861W-SRST-B/K9 Use Case
Branch Office Voice Failover and Secure WLAN with Cisco C1861W-SRST-B/K9-1861
In a distributed enterprise branch, the Cisco C1861W-SRST-B/K9-1861 delivers integrated secure WLAN and 8-user SRST/CME with 4 FXS and 2 BRI PSTN backup. It powers IP phones via 8 PoE ports and maintains local call processing during WAN outages, ensuring uninterrupted voice services, higher uptime, and reduced hardware footprint.
Retail Store Network Consolidation and Link Redundancy with Cisco C1861W-SRST-B/K9-1861
At a retail outlet, the Cisco C1861W-SRST-B/K9-1861 consolidates wired LAN, Wi-Fi, and PoE for POS terminals and security cameras, with dual BRI for PSTN fallback and an HWIC slot for 4G backup. Embedded SRST/CME ensures call continuity during WAN failures, optimizing reliability, minimizing capital expenditure, and simplifying branch IT operations.
Healthcare Clinic High-Availability Telephony and Secure Device Connectivity
In a remote clinic, the Cisco C1861W-SRST-B/K9-1861 provides WPA2-Enterprise WLAN for patient and staff devices, 8 PoE ports for IP phones and medical IoT sensors, 4 FXS for analog medical alarms, and SRST/CME for local call failover. This delivers high availability, healthcare-grade security compliance, and streamlined network management.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 C1861W-SRST-B/K9 |  CISCO1812/K9 |  CISCO1803/K9 |  CISCO1801WM-AGB/K9 |  C1841-3G-G | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | DSL | N/A | N/A | N/A |
| Built-in Security Features | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE, UL | IEEE802.3, IEEE802.3u, FCC, CE | FCC / CE | FCC / CE | IEEE 802.3, IEEE 802.3u |
| Connectivity Type | Wired / Wireless | Wired | Wired | Wired / Wireless | Wired |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | NIM | EHWIC | EHWIC | EHWIC | EHWIC |
| Features | VPN, Firewall, Integrated Services, IPv6 Compatible | VPN, VoIP, IPv6 Compatible, Firewall, MPLS | VPN / IPv6 Compatible / Firewall / Voice | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 128 MB | 256 MB | 256 MB |
| Form Factor | Desktop | Rack-mount / Desktop | Rack-mount | Desktop | Rack-mount |
| Height | N/A | N/A | 1.75 inches | N/A | N/A |
| High Availability Support | Supported | Supported | Not Supported | Not Supported | Not Supported |
| Integrated Services | Voice, Video | Voice / Video | Voice / Video | Voice / Video | Voice |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 / Combo Ports | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | N/A |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 256 MB | 512 MB | 128 MB |
| Modular Slots Available | 2 Slots | 1 Slot | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4, IPv6 | IPv4 / IPv6 | TCP/IP / IPX | IPv4 / IPv6 | IPv4, IPv6, MPLS |
| Power | 40W | 65W | 65 Watts | 65 Watt | 73 W |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco 1861 Wireless Services Router | CISCO1812/K9 Integrated Services Router | Cisco 1803/K9 Integrated Services Router | CISCO1801WM-AGB/K9 | Cisco 1841-3G-G |
| Product Type | Enterprise Router | Integrated Services Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SSH, Telnet, SNMP | CLI / SNMP / Telnet / SSH | CLI / SNMP | Telnet / SSH / SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | Gigabit | Fast Ethernet | Fast Ethernet | Gigabit | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.085 Gbps | N/A | 25 Mbps | 0.05 Gbps | 0.045 Gbps |
| Use Case | Business / Small Business | Business / Small Business | Small Business / Enterprise | Enterprise | Small Business |
| VPN Support | IPSec / SSL VPN / DMVPN / GRE | IPSec / SSL VPN / DMVPN | IPSec / GRE / DMVPN | IPSec | IPSec |
| WAN Configuration | Dual WAN | WAN | Dual WAN | Dual WAN | WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | 6.6 lbs | N/A | N/A |
| Wi-Fi Standard | WiFi 4 | N/A | N/A | WiFi 3 | N/A |
| Width | N/A | N/A | 17 inches | N/A | N/A |
| Wireless Support | Yes | No | No | Yes | No |
Reviews & Ratings
E
Ethan Davis
4
Cisco 1861W-SRST-B ensures seamless voice continuity during WAN outages. Easy to configure and manage.
L
Liam Walker
5
Consistent performance with integrated WLAN and POE support. Excellent branch office solution.
O
Olivia Taylor
3
Handles voice, data, and POE devices reliably. A solid all-in-one router for small offices.
B
Benjamin Roberts
4
Trusted Cisco reliability. SRST backup works flawlessly under load.
Questions & Answers
What is the Cisco 1861W Router (SKU C1861W-SRST-B/K9)?
The Cisco 1861W (C1861W-SRST-B/K9) is an integrated branch router with 802.11n wireless, 8-user SRST/CME voice fallback, 4 FXS ports, 2 BRI interfaces, 8 PoE ports, SP Services IOS and one HWIC slot.
What are the key features of the C1861W-SRST-B/K9?
Key features include integrated dual-band 802.11n WLAN; up to 8-user SRST for voice redundancy; 4 FXS analog ports; 2 BRI S/T ISDN interfaces; 8 PoE Fast Ethernet ports (123 W total); Cisco SP Services IOS; one HWIC slot.
How many users can the 1861W support with SRST?
The 1861W supports up to 8 concurrent SRST (Survivable Remote Site Telephony) users for Cisco Unified Communications Manager fallback during WAN outages.
What is Cisco SRST and how does it work?
Cisco SRST (Survivable Remote Site Telephony) provides dial-tone service locally when connection to CUCM is lost by running a lightweight call-processing agent on the router.