Cisco C926-4P Full Product Description

1. Short Overview

Suffix Breakdown

• C926: ISDN xDSL-native fixed router platform of Cisco 900 Series ISR
• 4: Integrated 4-port full Gigabit LAN switch
• P: All LAN ports support IEEE 802.3af PoE with total 60W PoE power budget (max 15.4W per port)

Core Differentiators

1. vs pure Ethernet C921-4P: C921-4P only offers dual copper GE WAN without DSL modem; C926-4P adds multimode VDSL2/ADSL2+ Annex B/J ISDN DSL primary WAN for ISDN carrier infrastructure.
2. vs POTS DSL C927-4P / high-upload C927-4PM: C927 series uses Annex A/M analog POTS DSL; C926-4P is optimized for ISDN Annex B/J copper loop deployments.
3. vs LTE variant C926-4PLTExx: C926-4P has no embedded CAT4 LTE cellular modem; LTE models add wireless cellular backup transport.
4. vs legacy C896VA-K9 ISR G2: C896VA-K9 runs older IOS with limited SD-WAN capability, external power supply and larger chassis; C926-4P adopts modern IOS XE native SD-WAN, compact slim form factor, simplified maintenance and optimized low-power design.
5. vs industrial rugged routers: C926-4P is commercial indoor desktop hardware with standard temperature operating range, not ruggedized for vehicle, railway or extreme outdoor shock/vibration environments.

2. Hardware Interface & Performance Specifications

Dual Redundant WAN Interfaces (Automatic Failover Supported)

1. Integrated Multimode VDSL2/ADSL2+ Port (Annex B/J for ISDN Circuits)
   Fully compliant with ITU G.993.2 VDSL2, G.992.5 ADSL2+ Annex B/J ISDN standard, auto-negotiates DSL line profiles. Supports G.INP impulse noise protection, Seamless Rate Adaptation (SRA), bitswap, TR069 remote DSLAM provisioning, real-time copper loop quality monitoring and Dying Gasp fault detection, dedicated for ISDN carrier broadband deployments.
2. 1 × 10/100/1000BASE-T Copper Gigabit Ethernet WAN Port
   Secondary backup Metro Ethernet/cable broadband uplink, auto MDI/MDI-X speed & duplex negotiation, supports HSRP, VRRP, MHSRP and policy-based multi-path failover when DSL link fails.

4-Port Full Gigabit PoE Managed LAN Switch

• 802.1Q VLAN tagging, port isolation, static MAC port security, dedicated DMZ port assignment
• Broadcast storm suppression, SPAN traffic mirroring, LACP link aggregation, Smartport auto-config macros
• Per-port CoS traffic marking, port bandwidth limiting, private VLAN segmentation

Management & Auxiliary Ports

1. Single USB 2.0 Type-A host port: External flash storage for offline configuration backup, system log archiving, EEM automation scripts and Zero-Touch Provisioning files
2. Separate RJ45 Console port: Dedicated local CLI access via rollover cable for out-of-band device management
3. External DC power input jack (requires separate 12V 30W universal AC power adapter, no internal built-in PSU)Cisco
4. Hardware reset button, Kensington anti-theft lock slot for physical equipment protection
5. Embedded RTC real-time clock for accurate timestamping of security logs, digital certificates and network fault events

Memory & Storage

• DRAM: 1 GB fixed system memory, supports up to 50 concurrent IPsec/DMVPN tunnels, SD-WAN multi-path forwarding, inline NGIPS inspection and full PoE LAN traffic processing
• Flash storage: 256 MB onboard flash; factory preloadedc900-universalk9-mzIOS XE Universal Advanced Security image, minimum supported firmware release 15.8(3)MbCisco

Front Panel LED Status Indicators

Physical & Power Parameters

• Form factor: Slim compact metal desktop chassis, optional wall-mount bracket available
• Dimensions (H × W × D): 28 mm × 259.1 mm × 177.8 mm
• Weight: ~1.1 kg (2.4 lbs) without external power adapter
• Power supply requirement: Separate external 12V DC 30W universal AC adapter (100–240V AC mains input)
• Typical maximum power consumption: 20 W under full ISDN DSL + GE WAN + all 4 PoE LAN ports full load
• Ingress protection: IP20, only suitable for dry indoor commercial office environments

Environmental Operating Specifications

• Operating temperature: 0°C ~ +40°C (32°F ~ 104°F); performance degrades 1.5°C per 1000 m altitude above 3000 m
• Storage temperature: -20°C ~ +65°C (-4°F ~ 149°F)
• Relative humidity: 10%–85% RH non-condensing
• Maximum operating altitude: 3,000 m (10,000 ft)

3. Hardware Acceleration & Security Engine

• Dedicated onboard crypto co-processor fully offloads IPsec, IKEv2 and SSL VPN encryption traffic, eliminating CPU bottlenecks under heavy concurrent site-to-site and remote access tunnel loads
• Permanent integrated universal security license enables full enterprise encryption suite: AES-128/192/256, 3DES, DES, SHA-1/SHA-2, IKEv1/IKEv2 static tunnels, Easy VPN remote access and DMVPN dynamic hub-spoke tunnels
• Built-in DSL traffic isolation filters to segregate ISDN copper loop traffic and protect internal corporate LAN via independent VLAN zoning

4. Cisco IOS XE Advanced Security & SD-WAN Feature Suite

Dual WAN Redundancy & ISDN DSL Routing

• Cisco Express Forwarding (CEF), static routing, RIPv1/v2, OSPF, EIGRP, BGP, GRE/MGRE tunnel encapsulation, complete IPv4/IPv6 dual-stack routing support
• Automatic policy-based multi-tier failover logic between primary Annex B/J ISDN VDSL2/ADSL2+ DSL and secondary copper GE WAN link via HSRP/VRRP/MHSRP
• Dedicated DSL OAM for ISDN copper loop diagnostics, TR069 remote DSLAM management, Metro Ethernet 802.3ah E-LMI link SLA monitoring for GE backup circuit
• Policy-Based Routing (PBR), multi-NAT pools, PAT overload for logical segmentation of PoE-powered IoT devices and standard wired LAN endpoints
• DHCP server/relay/client, DNS proxy, dynamic DNS, IP SLA active link performance monitoring

Unified Enterprise Threat Security Suite

• Zone-Based Stateful Inspection Firewall (ZBFW) to isolate internal corporate LAN, PoE camera/VoIP subnet, DMZ and untrusted internet traffic zones
• Next-Generation Intrusion Prevention System (NGIPS), Cisco cloud URL filtering, deep NBAR2 advanced application control for HTTP, FTP, IM, video conferencing and mainstream business applications
• AAA authentication via TACACS+ / RADIUS, 802.1X port authentication available on all 4 Gigabit PoE LAN ports
• Secure management only: SSHv2, HTTPS, SNMPv3; plaintext Telnet disabled by factory default
• Granular access control lists (ACLs), static MAC address port lockdown on Gigabit switch ports, anti-spoofing and DDoS mitigation filters for DSL inbound traffic

SD-WAN & Multi-Layer QoS Bandwidth Optimization

• Native Cisco SD-WAN Viptela integrated functionality for intelligent multi-path application-aware traffic steering over DSL and GE dual WAN links
• WFQ, CBWFQ, LLQ low-latency queuing mechanisms for priority forwarding of voice, video surveillance, POS payment and industrial SCADA real-time traffic
• NBAR2 deep packet inspection to classify and prioritize bandwidth-heavy business workloads over metered ISDN DSL circuits
• RTP/TCP header compression, DSL traffic shaping and policing to control xDSL metered data consumption and avoid bandwidth overage charges
• PoE QoS scheduling to guarantee stable power and bandwidth priority for mission-critical IP cameras and VoIP handsets

Remote Management & Automation

• Cisco Zero-Touch Provisioning (ZTP) for mass standardized deployment of enterprise branches and ISP ISDN managed CPE
• Cisco IOS Embedded Event Manager (EEM): Scriptable triggers for DSL line drop, GE WAN link failure, PoE power faults and USB storage events with email/SNMP alert notifications
• SNMP v2c/v3, remote syslog logging, IP SLA end-to-end link performance telemetry, dedicated DSL MIB extensions for ISDN copper loop signal status and line quality
• Compatible with Cisco Configuration Professional (CCP), Cisco DNA Center Lite and vManage SD-WAN controller for unified single-pane-of-glass remote monitoring of routing, security, PoE and DSL subsystems
• GOLD non-disruptive onboard diagnostics for continuous remote hardware health checks of DSL modem, copper Ethernet and PoE subsystems

5. Typical Deployment Scenarios

1. ISDN Small Retail Dual-WAN PoE Secure Gateway
   Primary Annex B/J ISDN VDSL2/ADSL2+ DSL delivers daily retail broadband traffic, copper GE Metro Ethernet serves as high-speed redundant backup. The 4-port full PoE LAN switch powers POS payment terminals, VoIP phones and on-site IP surveillance cameras. VLAN segmentation isolates sensitive payment infrastructure from guest device traffic, persistent IPsec DMVPN/SD-WAN tunnels transmit retail transaction data securely back to central corporate data centers, zone firewall + NGIPS block external network intrusion risks over ISDN DSL lines.
2. Service Provider Managed ISDN Business CPE
   Uniform compact hardware platform enables ISPs to deliver ISDN Annex B/J VDSL2/ADSL2+ DSL or copper GE Metro Ethernet managed broadband services for small enterprise subscribers. Centralized ZTP mass deployment and remote SNMP/vManage monitoring support bundled managed security, PoE and SD-WAN networking service packages for ISDN carrier networks.
3. Remote Small Office SD-WAN ISDN Branch Router
   Dual DSL/GE WAN redundancy meets enterprise business continuity requirements, integrated PoE eliminates separate power injectors for cameras and VoIP handsets, full EIGRP/BGP and native SD-WAN support enable seamless intelligent multi-path traffic steering to corporate headquarters.
4. Campus Remote Building PoE IoT Edge Router
   PoE LAN ports connect IP cameras, access control hardware and environmental monitoring sensors; ISDN DSL acts as primary connectivity for remote buildings without fiber coverage, copper GE link provides automatic high-throughput backup to campus core network, uninterrupted video and sensor data transmission is guaranteed during DSL outages.
5. ISDN-Line Teleworker Small Office Secure VPN Concentrator
   Deployed at remote employee residences serviced by ISDN Annex B/J copper circuits, multimode VDSL2/ADSL2+ DSL provides stable primary transport for encrypted Easy VPN/SD-WAN connectivity to corporate headquarters, PoE ports power home office IP cameras and VoIP equipment, integrated unified security services defend all wired Gigabit endpoints against malware and unauthorized internet access.

6. Standard Package Contents of C926-4P

Separately Sold Optional Accessories

• RJ45 rollover console cable for local CLI configuration
• 12V 30W external universal AC power supply (mandatory operating accessory)
• ISDN DSL copper line cord for xDSL WAN connection
• USB flash storage drives for log archiving and offline configuration backup
• CAT5e/CAT6 Ethernet patch cords for LAN and copper GE WAN connections

Software Licensing Information

• Permanent integrated security & crypto license included; no additional purchase required for IPsec, AES encryption, zone firewall and NGIPS threat defense features
• All core routing, dual DSL/GE WAN failover, ISDN DSL OAM management, native SD-WAN intelligent traffic steering, PoE power management, QoS, ZTP and 4-port Gigabit managed switch features are fully included in the base IOS XE universal image; no extra paid feature licenses needed
• No wireless AP or cellular modem license applicable (corresponding hardware is omitted from this pure wired ISDN xDSL PoE SKU)

Short Commercial Catalog Summary for Quotation