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ISR4321-V/K9 Small Office Router with TDM Gateway Support
Product Overview The Cisco ISR4321-V/K9 is a voice-enabled integrated services router from the Cisco ISR 4000 Series, specifically designed for small to mid-sized branch offices requiring unified communications. This model includes the Unified Communications (UC/Voice) license, enabling support for VoIP, CME, SRST, and TDM gateway functions. It delivers performance scalable from 50 Mbps to 100 Mbps, with modular slots for WAN and voice interfaces, and is SD-WAN ready, making it ideal for voice-rich branch deployments.
Product Details
Specification
Description
Product Code
ISR4321-V/K9
Series
Cisco ISR 4000 Series
Form Factor
1RU Rack-Mountable
Default Throughput
50 Mbps (license-upgradable to 100 Mbps)
Processor
Cisco QuantumFlow Processor
System Memory (DRAM)
4 GB (upgradeable to 8 GB)
Flash Storage
4 GB (upgradeable to 32 GB)
Integrated GE Ports
2 x 1G RJ45 + 1 x 1G SFP
NIM Slots
2
SM-X Slot
None
Voice License Included
Yes (UC – supports CME, SRST, DSP, and VoIP)
Security License Included
No (requires separate SEC license for IPsec, firewall)
SD-WAN Capable
Yes
Redundant Power Supply
Not supported
Virtualization
Supports KVM and container-based apps
Software
Cisco IOS XE (modular, programmable OS)
Product Features
UC license included for VoIP, SRST, and CME deployment scenarios
Supports TDM voice gateway (FXO/FXS, E1/T1) with voice DSP modules
Modular design with dual NIM slots for WAN and voice expansion
SD-WAN ready, enabling intelligent routing and secure multi-path WAN
Supports QoS, call survivability, and conferencing features
Ideal for voice-centric branch environments requiring compact deployment
Similar Models Comparison
Model
Voice License
Security License
Max Throughput
SD-WAN
Ideal Use Case
ISR4331-V/K9
Yes
No
300 Mbps
Yes
Larger branch UC deployments
ISR4321-V/K9
Yes
No
100 Mbps
Yes
Small branch unified comms
ISR4321-VSEC/K9
Yes
Yes
100 Mbps
Yes
Small secure voice branch
Latest Cisco ISR 4000 Voice-Enabled Models
Model
Max Throughput
UC License
Security License
SD-WAN
Ideal Deployment Size
ISR4451-V/K9
2 Gbps
Yes
No
Yes
Large enterprise voice branches
ISR4351-V/K9
400 Mbps
Yes
No
Yes
Medium-size UC branches
ISR4331-V/K9
300 Mbps
Yes
No
Yes
Medium-to-small UC environments
ISR4321-V/K9
100 Mbps
Yes
No
Yes
Compact branch voice routing
Sinanova specializes in supplying ICT networking equipment from leading brands such as Cisco, Huawei, and Juniper. Our product range includes switches, routers, firewalls, wireless access points and controllers, IP phones, video conferencing solutions, and more. We are committed to delivering original and reliable hardware along with professional ICT solutions—all at competitive prices. Our high-quality service ensures a smooth and hassle-free purchasing experience for our clients.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Distributor/Wholesaler,Exporter,Seller
Year Established:
2025
Total Annual:
50000-3000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Sinanova began as a domestic distributor of Cisco products and an ICT integrator. Over time, the company expanded its portfolio to include Huawei data communication equipment as well as networking solutions from Juniper and Fortinet.
Today, Sinanova specializes in providing a wide range of networ... Sinanova began as a domestic distributor of Cisco products and an ICT integrator. Over time, the company expanded its portfolio to include Huawei data communication equipment as well as networking solutions from Juniper and Fortinet.
Today, Sinanova specializes in providing a wide range of networ...
