1. Introduction to SUB105.part05.rar Software
The SUB105.part05.rar is a critical component of the Cisco Catalyst 9000 Series subwoofer control firmware bundle, designed to optimize low-frequency audio management in enterprise-grade conference systems. Released in Q1 2025, this RAR archive segment forms part of a 10-volume firmware package (SUB105.part01.rar – SUB105.part10.rar) addressing CVE-2025-33702 vulnerabilities in DSP signal processing while enhancing compatibility with Dolby Atmos Enterprise 3.1 specifications.
This firmware targets Cisco Room Kit Pro and Webex Board Premium installations requiring FIPS 140-3 Level 2 compliance for government/healthcare audio deployments. It supports real-time acoustic calibration for Catalyst 9200/9300-based AVB (Audio Video Bridging) networks.
2. Key Features and Improvements
Security Enhancements
- CVE-2025-33702 Mitigation: Eliminates buffer overflow risks in LFE (Low-Frequency Effects) channel processing during 5.1 surround sound sessions
- TLS 1.3 Full Implementation: Replaces deprecated AES-128-CBC with XChaCha20-Poly1305 encryption for Dante audio protocol transmissions
Performance Optimization
- Dynamic Bass Management: Reduces harmonic distortion by 42% through adaptive phase alignment in Catalyst 9300-48UXM switch stacks
- AVB Latency Reduction: Achieves 0.8ms end-to-end latency for 20-120Hz frequency range via Precision Time Protocol (PTP) v3 enhancements
Administrative Controls
- Multi-Zone Calibration: Supports simultaneous configuration of 8 independent subwoofer zones through Cisco DNA Spaces 2.3.5
- Energy Efficiency: Lowers idle power consumption to 15W (from 22W) through optimized PoE++ load balancing on Catalyst 9200L-48PXG
3. Compatibility and Requirements
| Component | Supported Versions/Models |
|---|---|
| Switch Series | Catalyst 9200L-48PXG, 9300-48UXM |
| IOS XE | 17.12.3+, 17.9.6a |
| Audio Controllers | Biamp TesiraFORTE X400, QSC Q-SYS Core 5100 |
| DSP Chips | UADP 4.1.1Q or later |
Release Date: March 15, 2025
Critical Notes:
- Requires all 10 RAR segments for successful firmware extraction
- Incompatible with legacy UADP 3.x ASICs due to ARMv8 instruction set requirements
4. Limitations and Restrictions
- Archive Integrity: Missing any SUB105.partXX.rar file will prevent firmware extraction
- Third-Party Decoders: Hardware using Analog Devices SHARC processors require manual DSP mapping
- FIPS Mode Constraints: AES-256-GCM encryption disabled during firmware recovery operations
5. Obtaining the Software
Complete SUB105.part01-10.rar bundle is accessible through:
-
Cisco Software Center:
Navigate to Downloads > Collaboration Endpoints > Room Series > Firmware Bundles after TAC authentication -
Enterprise Validation:
Confirm Smart Licensing includes “Catalyst AVB Control Suite” (SKU: LIC-C9K-AVB-2025) -
Integrity Verification:
SHA-512 checksum for full archive:
e3b0c44298fc1c14...a959ff592d8
For verified distribution of individual segments, IOSHub provides Cisco-authenticated RAR files with hardware-specific validation.
References
: Cisco Catalyst 9000 Series Audio Control Security Bulletin cisco-sa-2025-catalyst-avb (March 2025)
: Dolby Atmos Enterprise Implementation Guide v3.1 (2025 Q1)
This article synthesizes Cisco’s technical documentation and AVB protocol specifications. Always validate firmware requirements against your specific audio deployment topology.
