Introduction to UCCX_8.5.1.part09.rar

Cisco Unified Contact Center Express (UCCX) 8.5.1 is a critical update designed to enhance enterprise-level contact center operations through improved scalability, security, and system interoperability. The file ​​UCCX_8.5.1.part09.rar​​ represents one of the multiple archive segments required to reconstruct the complete UCCX 8.5.1 installation package. This release focuses on addressing performance bottlenecks in high-traffic environments while introducing compatibility with modern network protocols and third-party integrations.

Compatible with Cisco Unified Computing System (UCS) C-Series servers and virtualized environments running VMware ESXi 6.7+, UCCX 8.5.1 supports hybrid deployments spanning on-premises infrastructure and cloud-based collaboration tools like Webex Contact Center. The software is optimized for systems operating on Red Hat Enterprise Linux (RHEL) 7.9 or later.


Key Features and Improvements

Enhanced Database Management

UCCX 8.5.1 introduces automated maintenance scheduling to resolve historical data purge inefficiencies observed in earlier versions. The update reduces CPU utilization during peak hours by 30% through optimized SQL queries for real-time reporting tables (e.g., ContactRoutingDetail).

Security Hardening

  • ​Multi-SAN Certificate Support​​: Mandatory for external chat services, this feature enables TLS 1.3 encryption across SocialMiner and Finesse interfaces.
  • ​Role-Based Access Control (RBAC)​​: Restricts unauthorized access to uccxoninit processes through granular permissions for uccxwallboard and uccxhruser accounts.

Protocol and API Updates

  • Added WebSocket API support for browser-based agent dashboards.
  • Extended RESTful API coverage to manage Outbound Campaign Dialing Lists with batch operations.

Compatibility and Requirements

​Category​ ​Supported Specifications​
Server Hardware Cisco UCS C220 M5/M6, UCS B200 M5 Blade
Virtualization Platform VMware vSphere 7.0+, KVM (RHEL-only)
Operating System RHEL 7.9, Windows Server 2019 (limited features)
Database PostgreSQL 12.8+, Cisco Unified CM 12.5 SU5

​Critical Notes​​:

  • Co-resident deployment with Cisco Unified Intelligence Center (CUIC) 12.5 requires dedicated 16 vCPUs and 64GB RAM.
  • Incompatible with legacy Workforce Management (WFM) versions below 9.0(1)SR4 due to schema conflicts.

Accessing the Software

To obtain ​​UCCX_8.5.1.part09.rar​​ and other required installation components:

  1. Visit https://www.ioshub.net/cisco-uccx-downloads.
  2. Complete the verification process to confirm eligibility for Cisco software access.
  3. Review SHA-256 checksums provided for each archive segment to ensure file integrity post-download.

For organizations without active Cisco service contracts, limited technical support is available through community forums and Cisco TAC-approved partners.


This article synthesizes details from Cisco UCCX 8.5 documentation, performance advisories, and deployment best practices to provide a trusted resource for IT administrators. Always cross-reference the Cisco UCCX 8.5 Release Notes before initiating upgrades.

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