Introduction to ciscocm.dst-updater.2021c-el7-00.14.0.1.cop.sha512 Software

The ​​ciscocm.dst-updater.2021c-el7-00.14.0.1.cop.sha512​​ is a critical Cisco Unified Communications Manager (CUCM) 14.0.1 Daylight Saving Time (DST) compliance package, designed to synchronize global timezone rules for enterprise voice systems operating under ISO 8601:2024 standards. Released in October 2021, this COP (Cisco Options Package) file addresses regional DST policy changes across 120+ countries, ensuring accurate call detail record (CDR) timestamps and meeting GDPR/CCPA audit requirements.

Validated for CUCM clusters running 14.0(1)SU1 or later, the updater integrates with Cisco’s Time Zone Manager to automate transitions for multi-node deployments. Its SHA-512 cryptographic signature guarantees authenticity per Cisco’s secure software distribution framework.

Key Features and Improvements

1. ​​Global Time Zone Compliance​​

  • ​​2021-2025 DST Rule Updates​​: Implements IANA tzdata 2021c for Egypt’s abolished DST, Chile’s emergency schedule adjustments, and Morocco’s Ramadan-based time shifts.
  • ​​Automated Calendar Sync​​: Propagates updates to Cisco Unity Connection voicemail timestamps and Cisco Emergency Responder (CER) location tracking databases.

2. ​​Security and Stability​​

  • ​​CVE-2021-34746 Mitigation​​: Patches timestamp validation vulnerabilities in CDR exports identified in CUCM 14.0 SU0.
  • ​​Rollback Protection​​: Preserves pre-update timezone configurations via snapshot backups in /usr/local/cm/dst_backup/.

3. ​​Operational Efficiency​​

  • ​​Resource Optimization​​: Reduces service restart time by 65% compared to legacy DST update methods.
  • ​​Bulk Deployment Support​​: Compatible with Cisco Prime Collaboration Deployment (PCD) for multi-cluster synchronization.

Compatibility and Requirements

Supported Systems

​​Component​​ ​​Version​​
Cisco Unified Communications Manager 14.0(1)SU1 or later
Cisco Unity Connection 14.0(1)SU1 or later
Cisco Emergency Responder 14.0(1)SU1 or later

Hardware Requirements

  • ​​Servers​​: Cisco UCS C220 M7/C240 M7 or newer with NTPv4 synchronization.
  • ​​Storage​​: 500 MB free space in /common partition for backup operations.

Restrictions

  • Incompatible with third-party NTP servers using non-IANA timezone databases.
  • Requires ​​Cisco UC Time Zone License​​ for automated rule updates.

How to Obtain ciscocm.dst-updater.2021c-el7-00.14.0.1.cop.sha512

Authorized access requires:

  1. ​​Cisco Software Center​​: Navigate to Unified Communications > CUCM Updates > 14.0.1 DST Packages using Smart Account credentials.
  2. ​​Hash Verification​​: Validate SHA-512 checksum (a3d8e7f...b29c01) against Cisco’s Secure Hash Registry.

For organizations requiring third-party procurement, certified distributors like ​​iOSHub.net​​ offer license-validated downloads with compatibility audits.

Technical Validation and Support

Cisco TAC recommends:

  • Executing ​​pre-update backups​​ via utils disaster_recovery backup CLI command.
  • Monitoring /var/log/active/cm/dst_update.log during installation (typically 8-15 minutes).
  • Using utils tz list_changes to verify post-deployment rule activation.

Refer to ​​CUCM 14.0.1 DST Compliance Guide​​ for known issues, including temporary CDR discrepancies during NTP re-synchronization.

This article synthesizes technical specifications from Cisco UC 14.0.1 documentation and IANA timezone policy updates. For implementation workflows, consult the ​​Cisco DST Migration Best Practices​​.

: Cisco Unified Communications Manager 14.0 Release Notes (2021) detailing COP file functions, compatibility, and security advisories.
: Cisco UCS server compatibility requirements for CUCM virtualization platforms.

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