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C888SRST-K9
- Description:
- Cisco SRST888 G.SHDSL / FXS / BRI / Sec Router
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Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
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Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
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C888SRST-K9 Overview
C888SRST-K9 is a fixed integrated services router designed for secure and reliable connectivity at remote sites and branch offices. It features efficient AC power options, dual WAN interfaces, and four LAN ports, all built into a compact chassis while delivering integrated services such as voice and video, alongside advanced firewall and VPN capabilities.
C888SRST-K9 offers robust VPN support including IPSec and SSL VPN to secure data communications with high throughput and low latency. Its architecture provides internal redundancy and supports essential QoS features along with integrated security, making it ideally suited for business and enterprise use cases requiring survivable remote site telephony and seamless connectivity.
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C888SRST-K9 Specifications
| Product Type | Enterprise Router |
| VPN Support | IPSec / SSL VPN / DMVPN / N/A |
| 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 | N/A |
| Connectivity Type | Wired |
| Network Protocols | IP, PPP, Frame Relay, MLPPP |
| Remote Management | Telnet, SSH, SNMP |
| Compliance Standards | FCC, CE, UL |
| Wireless Support | No |
| Speed/Capacity | N/A |
| Firewall Features | Yes |
| Features | VPN / VoIP / IPv6 Compatible / Firewall |
| Use Case | Business |
| Management | Managed |
| Form Factor | Rack-mount |
| Integrated Services | Voice / Video |
| High Availability Support | Supported |
| Safety | N/A |
| EMC | N/A |
| Telecom | N/A |
| Throughput Capacity | 0.15 Gbps |
| QoS Features | Supported |
| Built-in Security Features | Firewall / Intrusion Prevention |
| Expansion Slots | N/A |
| Modular Slots Available | N/A |
| Stacking Capability | No |
| 5G Support | No |
| Memory | 512 MB |
| Flash Memory | 128 MB |
| Interface Ports | RJ-45 / SFP |
| Power | 45W |
| Device Type | Router |
| Product Name | Cisco C888SRST-K9 |
| Height | 1.1 inches |
| Width | 8.8 inches |
| Depth | 7.5 inches |
| Weight | 5.5 lbs |
C888SRST-K9 Use Case
Remote Branch Office Business Continuity with G.SHDSL WAN Failover
In a multi-location retail chain, the C888SRST-K9 delivers automatic Site Resilient Transport (SRT) using G.SHDSL to maintain connectivity when MPLS or broadband links fail. By switching to the built-in G.SHDSL interface and integrated VPN security, branch offices stay online for critical POS transactions and real-time inventory updates. Outcome: near-zero downtime, uninterrupted sales processing, and consistent customer experience.
Secure Voice Resiliency During UC Platform Outages
A financial services firm uses C888SRST-K9 to provide Cisco SRST fallback for its Cisco Unified Communications Manager. When the primary WAN link or call manager goes offline, FXS ports on the SRST888 instantly register IP phones and restore dial tone over a secure VPN. Outcome: uninterrupted voice service, compliance with internal SLAs, and protection of sensitive financial conversations.
Rural Site Multi-Service Connectivity with G.SHDSL, BRI & Security
In a remote manufacturing plant lacking fiber access, the C888SRST-K9 combines G.SHDSL bonding and ISDN BRI to deliver high-speed data, secure VPN, and legacy voice over FXS. The integrated firewall and IPsec encryption secure PLC telemetry and voice communications back to headquarters. Outcome: cost-effective rural connectivity, consolidated services on a single platform, and robust data security.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | DSL / Cable / N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC, CE, UL | FCC, IC | FCC, CE | FCC, CE, RoHS | IEEE 802.3, IEEE 802.11b/g |
| Connectivity Type | Wired | Wired / Wireless / Ethernet | Wired | Wired / Wireless | Wired / Wireless |
| Depth | 7.5 inches | 11 inches | 9.06 inches | 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 | N/A | N/A | EHWIC | N/A | N/A |
| Features | VPN / VoIP / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall | VPN, Firewall, Integrated Wireless, VoIP |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 128 MB | 128 MB |
| Form Factor | Rack-mount | Desktop | Desktop | Desktop | Desktop |
| Height | 1.1 inches | 1.8 inches | 1.73 inches | N/A | N/A |
| High Availability Support | Supported | Not Supported | Supported | Not Supported | Supported |
| Integrated Services | Voice / Video | Voice / Video / WAN Optimization | Voice / Video | Voice | 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 | 512 MB | 512 MB | 512 MB | 256 MB | 256 MB |
| Modular Slots Available | N/A | N/A | 1 Slot | N/A | N/A |
| Network Protocols | IP, PPP, Frame Relay, MLPPP | IPv4, IPv6, HTTP, HTTPS, SSH, SNMP | IPv4 / IPv6 | IPv4, IPv6 | TCP/IP, UDP, ICMP |
| Power | 45W | 24W | 25 Watt | 24W | 65 Watt |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | DC Power Supply | AC Power Supply / DC Power Supply / Redundant |
| Product Name | Cisco C888SRST-K9 | CISCO881W-GN-A-K9 Integrated Services Router | CISCO891-K9 Integrated Services Router | Cisco 876 Wireless Integrated Services Router | CISCO851W-G-A-K9 |
| Product Type | Enterprise Router | Enterprise Router | Integrated Services Router | Integrated Services Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | Telnet / SSH / HTTP/HTTPS | CLI / Web-based | HTTP, HTTPS, Telnet, SSH, SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / RIP / Static Routing | RIP / OSPF / EIGRP / Static Routing | OSPF / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | N/A | N/A | Gigabit | N/A | 100 Mbps |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.15 Gbps | 50 Mbps | 0.1 Gbps | 20 Mbps | 100 Mbps |
| Use Case | Business | Small Business / Enterprise | Business | Small Business | Enterprise / Small Business |
| VPN Support | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN / N/A | IPSec / SSL VPN / DMVPN | IPSec | IPSec |
| WAN Configuration | Dual WAN | WAN | Dual WAN | WAN | WAN |
| WAN Ports | 2 WAN | 1 WAN | 1 WAN | 1 WAN | 1 WAN |
| Weight | 5.5 lbs | 6 lbs | 8.96 lbs | N/A | N/A |
| Wi-Fi Standard | N/A | WiFi 4 | N/A | WiFi 3 | WiFi 4 (802.11g) |
| Width | 8.8 inches | 15 inches | 8.27 inches | N/A | N/A |
| Wireless Support | No | Yes | No | Yes | Yes |
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Questions & Answers
Q
What is the Cisco SRST888 G.SHDSL/FXS/BRI/Sec Router (C888SRST-K9)?
A
The Cisco SRST888 (C888SRST-K9) is a secure branch router offering G.SHDSL WAN, FXS/BRI voice ports, and integrated security for reliable failover and IP telephony continuity.
Q
How does Cisco SRST888 enable dial-tone survivability?
A
Cisco SRST888 provides Survivable Remote Site Telephony (SRST) by locally routing voice calls over FXS/BRI ports when the primary call manager is unreachable.
Q
What WAN connectivity options are supported?
A
The SRST888 supports dual G.SHDSL interfaces delivering up to 15.3 Mbps symmetrical bandwidth for robust, cost-effective broadband connectivity.
Q
How many FXS and BRI ports are available?
A
This router features eight FXS ports for analog phones and two BRI S/T ports for ISDN voice or data connectivity.
Q
Does the SRST888 offer built-in security features?
A
Yes. It includes integrated stateful firewall, VPN (IPsec), intrusion prevention, and URL filtering to safeguard branch networks.
Q
What are the router’s throughput capabilities?
A
The Cisco SRST888 delivers up to 60 Mbps of IPsec VPN throughput and 100 Mbps of routing performance under typical branch loads.
Q
Can I use this router with Cisco Unified Communications Manager?
A
Absolutely. The SRST888 is designed for seamless integration with Cisco Unified Communications Manager, ensuring uninterrupted voice services.
Q
How is failover configured for voice traffic?
A
Voice failover is automatic—when IP WAN is down, SRST888 switches calls to local FXS/BRI ports, restoring dial tone in seconds.
Q
What VPN protocols does the SRST888 support?
A
It supports IPsec VPN with DES, 3DES, AES encryption, IKEv1/IKEv2 key exchange, and prerouting packet inspection for secure site-to-site tunnels.
Q
Is the SRST888 compatible with Cisco Unified Survivable Remote Site Telephony?
A
Yes. The C888SRST-K9 is purpose-built for Cisco Unified SRST, extending call-processing features when connectivity to the primary call manager is lost.
Q
How do I license additional features?
A
Feature licenses are managed through Cisco Smart Licensing. You can activate advanced security, higher voice channel counts, or enhanced VPN features as needed.
Q
Does the SRST888 support Quality of Service (QoS)?
A
Yes. It offers advanced QoS features like traffic classification, shaping, policing, and Cisco Weighted Random Early Detection (WRED) to prioritize voice and critical data.
Q
What power and form factor does the router have?
A
The SRST888 is a compact, desktop-mountable unit powered by an external 60W adapter, ideal for small branch offices and remote sites.
Q
How easy is it to deploy and manage?
A
Deployment is streamlined via Cisco Configuration Professional Express. Ongoing management is available through Cisco DNA Center or CLI for advanced control.
Q
What warranty and support options are available?
A
Cisco offers a limited lifetime hardware warranty plus access to Cisco SMARTnet for 24×7 support, software updates, and advanced replacement services.
Q
Can the SRST888 handle IPv6 traffic?
A
Yes. This router supports full IPv6 routing, firewall, and VPN features, ensuring future-proof connectivity for modern IP networks.
