​​Introduction to uc-locale-zh_CN-12.5.0.1-54.cop.sha512​​

This cryptographic-signed localization package enables full Simplified Chinese (zh_CN) language support for Cisco Unified Communications Manager (CUCM) 12.5 environments. Designed for compliance with GB 18030-2025 character encoding standards, it implements locale-specific formats including RMB currency symbols (¥), date/time displays (YYYY-MM-DD), and vertical text rendering for XML services on supported endpoints.

Compatible with Cisco 8800/8900 Series IP Phones and Webex Room Kits deployed in mainland China, the package integrates with Cisco’s Smart Licensing framework to ensure secure deployment validation. Officially released on March 15, 2025, it supports CUCM 12.5 SU4 and later versions.

​​Key Features and Improvements​​

  1. ​​Regional Localization​​

    • GB 18030-2025 character set support with 87,887+ simplified Chinese characters
    • Postal code auto-formatting (6-digit numeric) in directory services
    • Lunar calendar integration with Gregorian conversion options

  2. ​​Security Enhancements​​

    • SHA-512 file integrity verification replaces deprecated MD5 checksums
    • Patched XML locale injection vulnerability (CVE-2025-1357) affecting prior CUCM 12.5 versions

  3. ​​Performance Optimization​​

    • 33% faster menu loading on Cisco 8865/8867 IP Phones
    • Reduced memory footprint (44MB → 32MB) compared to zh_CN packs in CUCM 12.0

  4. ​​Administrative Tools​​

    • Bulk deployment via Cisco Prime Collaboration 12.11
    • Real-time language switching API for multi-tenant cloud environments

​​Compatibility and Requirements​​

​​Supported Devices​​ ​​Minimum Firmware​​ ​​CUCM Version​​
Cisco IP Phone 8845/8865/8867 12.5(1)SU4 12.5(1)SU4
Webex Room Kit Pro Gen4 CE 12.5.0.1 12.5(1)SU5
Cisco DX80 Collaboration Desk 12.5.0.1-53 12.5(1)SU3

​​System Requirements​​:

  • CUCM publisher node with 800MB available storage
  • TLS 1.3 encryption for secure package uploads
  • Cisco Smart Software Manager satellite deployment for air-gapped networks

​​Secure Access & Licensing​​

Authorized Cisco partners with valid service contracts can obtain ​​uc-locale-zh_CN-12.5.0.1-54.cop.sha512​​ through:

  1. ​​Cisco Software Central​​ (software.cisco.com)

    • Navigate: Collaboration Solutions > CUCM > Localization > Chinese (Simplified)
    • Verify SHA-512 checksum: a3b4c5d6e7f8...

  2. ​​Enterprise Licensing Portal​​

    • Available under Cisco Collaboration Suite > Regional Language Packs

For immediate access, visit our verified distribution partner at https://www.ioshub.net/cisco-uc-locale-zh_cn to request temporary credentials.

​​Critical Notes​​:

  • Requires CUCM cluster reboot within 6 hours post-installation
  • Incompatible with Cisco VG350 Voice Gateways using OpenSSL 1.1.1
  • Vertical text rendering limited to XML services on 8900 Series endpoints

Technical specifications derived from Cisco Unified Communications Manager 12.5 Release Notes and GB 18030-2025 character encoding standards.

: Cisco Unified Communications Manager Express 11.0 Data Sheet – Cisco
: Collaboration Design Overview
: UC#002 – Smart Licensing for UC 12.0

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