Cisco ISR4321-V/K9 Voice Bundle Integrated Services Router
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ISR4321-V/K9 Overview
ISR4321-V/K9 Voice Bundle Scope
ISR4321-V/K9 combines the ISR 4321 hardware platform with Cisco's Voice bundle. Cisco defines the V bundle as IP Base plus Unified Communications capabilities for CME, SRST and CUBE. The V suffix does not by itself confirm DSP capacity, voice interface cards, session counts or regional telephony components; those items remain configuration checks.
ISR 4321 Platform Facts
Cisco lists two onboard Gigabit Ethernet ports, two NIM slots, one ISC slot, 4 GB default flash and 4 GB default DRAM for the ISR 4321. Base aggregate throughput is 50 Mbps. FL-4320-PERF-K9 raises the performance tier to 100 Mbps, while the separate FL-4320-BOOST-K9 license is specified for up to 1.6 Gbps CEF under Cisco test conditions.
Voice Procurement Checks
- Confirm the quotation includes the intended Voice bundle entitlement rather than only an ISR4321/K9 base chassis.
- Validate CME, SRST and CUBE requirements, session counts and IOS XE release support.
- Specify DSP/PVDM resources, NIM voice interfaces, power supply and regional cables separately where required.
- Confirm the current licensing and support route for this earlier-generation ISR platform before purchase.
ISR4321-V/K9 Specification
| Exact model / SKU | ISR4321-V/K9 |
| Offering type | Cisco ISR 4321 Voice bundle |
| Voice bundle definition | IP Base plus Unified Communications: CME, SRST and CUBE |
| Onboard Ethernet | 2 x Gigabit Ethernet |
| NIM slots | 2 |
| ISC slots | 1 |
| Default flash | 4 GB |
| Default DRAM | 4 GB |
| Base aggregate throughput | 50 Mbps |
| Performance tier | 100 Mbps with FL-4320-PERF-K9 |
| Separate boost tier | Up to 1.6 Gbps CEF with FL-4320-BOOST-K9 under Cisco test conditions |
| Configuration validation | Confirm licenses, DSP/PVDM capacity, voice interfaces, session counts, software and regional accessories |
| Source match | Cisco's official ISR 4000 data sheet defines the V bundle and provides exact ISR 4321 ordering, hardware and performance-license facts |
| Official manufacturer reference | Cisco 4000 Family ISR official data sheet |
ISR4321-V/K9 Warranty
 | Low Price Guarantee |  | Quality Assurance |
 | Free CCIE Expert Technical Support |  | Commodity Refund Guarantee |
 | Diversified and Flexible Transportation Services |  | Standard Policy |
ISR4321-V/K9 FAQ
What is ISR4321-V/K9?
Cisco ISR4321-V/K9 Voice Bundle Integrated Services Router is a CISCO Router ISR 4000 product supplied by YYST Global for enterprise IT procurement and infrastructure projects.
What interfaces and ports does ISR4321-V/K9 provide?
For ISR4321-V/K9, the manufacturer specification lists onboard ethernet as 2 x Gigabit Ethernet.
What memory or storage is listed for ISR4321-V/K9?
For ISR4321-V/K9, the manufacturer specification lists default flash as 4 GB.
What base aggregate throughput is listed for ISR4321-V/K9?
For ISR4321-V/K9, the manufacturer specification lists base aggregate throughput as 50 Mbps.
Is ISR4321-V/K9 available from YYST Global?
ISR4321-V/K9 is in stock at YYST Global. Contact the sales team to confirm the required quantity, exact configuration, delivery destination and current lead time before ordering.
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ISO 9001 · ISO 14001 · ISO 45001
ISO 20000 · ISO 27001 · D&B