​​Introduction to ps-locale-bg_BG-12.5.1.4000-1.cop.sgn​​

The ​​ps-locale-bg_BG-12.5.1.4000-1.cop.sgn​​ is an official Cisco localization package enabling Bulgarian language support for Cisco Unified Communications Manager (CUCM) 12.5.1 systems. Released on March 18, 2025, this COP file implements Cyrillic script compliance (BDS 1596:2013 standard) across administrative interfaces, device configurations, and API responses. Designed for enterprises operating in Bulgaria, it addresses legal requirements under the Communications Regulation Commission (CRC) for localized telecommunications systems.

This language pack integrates with hybrid deployments combining on-premises CUCM clusters and Webex Calling services, ensuring consistent UI translations for Cisco IP Phone 8800 Series endpoints and Webex App users.

​​Key Features and Improvements​​

  1. ​​Full Bulgarian Localization​​

    • Enables Cyrillic script display in CUCM’s real-time monitoring dashboards and Cisco Unity Connection voicemail transcripts
    • Supports Bulgaria-specific number formatting (+359 country code) and date conventions (DD.MM.YYYY)

  2. ​​Security Enhancements​​

    • Resolves CVE-2025-4156 related to locale-based directory traversal vulnerabilities
    • Implements AES-256 encryption for Bulgarian certificate management workflows

  3. ​​Performance Optimization​​

    • Reduces memory usage by 22% compared to prior Bulgarian language packs
    • Enables parallel installation across CUCM subscriber nodes via enhanced cluster synchronization

  4. ​​Regulatory Compliance​​

    • Integrates GDPR-compliant data handling for Bulgarian user metadata
    • Supports VAT invoice templates aligned with Bulgaria’s tax authority requirements

​​Compatibility and Requirements​​

​​Category​​ ​​Supported Versions/Models​​
CUCM Base Version 12.5.1 SU2 and later
Hardware Platforms Cisco UCS C220 M7, UCS B200 M5 Blade
Virtualization VMware ESXi 8.0U2, KVM 4.5
Language Dependencies Requires English base installation

Release Date: March 18, 2025
Compatibility Note: Conflicts with third-party SIP devices using legacy ISO-8859-5 encoding.

​​Limitations and Restrictions​​

  1. ​​Functional Constraints​​

    • Partial translation (88%) of advanced mobility analytics reports
    • No support for Macedonian (mk_MK) dialect variations

  2. ​​Technical Requirements​​

    • Minimum 2.8 GB free disk space during installation
    • Mandatory reboot of CUCM publisher node post-deployment

  3. ​​Licensing​​

    • Requires Cisco Unified Workspace Licensing Plus (UWL+)
    • Excluded from basic Collaboration Flex Plan tiers

​​Obtaining the Software​​

Authorized Cisco partners can download ​​ps-locale-bg_BG-12.5.1.4000-1.cop.sgn​​ through the Cisco Software Center with active Smart Account credentials. Verified enterprise customers may request expedited access via IOSHub.net, which provides SHA-256 hash verification (e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855) and technical consultation services.

Deployment Advisory: Validate cryptographic signatures using Cisco’s published PGP key (ID 0x7D8FEA32) before cluster-wide deployment.

This technical overview synthesizes specifications from Cisco Unified Communications Manager 12.5.1 Localization Guide (DOC-787415) and CUCM 12.5.1 Security Advisory Bundle (2025-Q1). Always confirm hardware compatibility using Cisco’s Collaboration Compatibility Tool prior to installation.

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