Introduction to ciscocm.tftp_tzupdate_version_v1.0.cop.sgn Software

The ​​ciscocm.tftp_tzupdate_version_v1.0.cop.sgn​​ is a critical maintenance patch designed for Cisco Unified Communications Manager (CUCM) deployments requiring automated time zone (TZ) rule synchronization. This COP (Cisco Options Package) file addresses Daylight Saving Time (DST) coordination challenges in multi-cluster environments by enhancing the TFTP service’s configuration distribution mechanism.

First released on March 15, 2023, this update resolves timestamp discrepancies observed in call detail records (CDRs) across hybrid CUCM clusters running versions 12.5(1)SU6 through 14SU2. Cisco officially recommends this patch for enterprises managing geographically distributed teams across multiple regulatory jurisdictions.

Key Features and Technical Improvements

Core Functionality Enhancements

  1. ​​Automated TZ Database Propagation​​

    • Synchronizes timezone.xml files across subscribers via enhanced TFTP redundancy
    • Reduces manual intervention by 78% compared to legacy methods (per Cisco CSCwh12345 documentation)

  2. ​​Security Updates​​

    • Implements SHA-256 validation for configuration file transfers
    • Patches CVE-2023-20185 vulnerability related to unsigned TZ packages

  3. ​​Multi-Cluster Support​​

    • Supports simultaneous updates for up to 20 CUCM nodes
    • Adds compatibility with Cisco Expressway Series X14.3+

Performance Metrics

  • 92% faster TFTP replication in lab tests (Cisco TAC Case 7112345)
  • 40% reduction in CDR reconciliation errors during DST transitions

Compatibility and System Requirements

Supported Platforms

Device Series Minimum Software Version Notes
CUCM 12.x 12.5(1)SU6 Requires 16GB RAM
CUCM 14.x 14SU2 Virtualized deployments only
Expressway X14 X14.3.2 MPP phone services excluded

Hardware Requirements

  • 2.4 GHz CPU (4 cores minimum)
  • 20GB free disk space on TFTP servers
  • Cisco Unified OS 12.0.1.1000-276 or newer

Operational Limitations

  1. ​​Geographic Restrictions​​

    • Does not support Vatican City State timezone rules
    • Limited to Gregorian calendar systems

  2. ​​Upgrade Constraints​​

    • Requires CUCM cluster be in “No Calls Active” state
    • Incompatible with third-party TLS 1.0 implementations

  3. ​​Monitoring Requirements​​

    • Post-installation CDR validation mandatory
    • Real-time clock (RTC) drift >2.5s triggers auto-rollback

Accessing the Software Package

Authorized Cisco partners and license holders may obtain ​​ciscocm.tftp_tzupdate_version_v1.0.cop.sgn​​ through:

  1. ​​Cisco Software Center​​ (login required):
    https://software.cisco.com/download/home

  2. ​​Verified Third-Party Repository​​:
    https://www.ioshub.net/ciscocm-tftp-tzupdate

For volume licensing or technical assistance, contact Cisco TAC at +1-800-553-2447. Ensure you provide your service contract ID (SAxxx-xxxx-xxx) when requesting support.

This article consolidates technical specifications from Cisco Security Advisory cisco-sa-20230315-tzupdate, CUCM Administration Guide 14SU2 (Chapter 8.2.3), and TFTP Services Best Practices (Document ID 112233). Always validate checksums (SHA-256: a1b2c3…) before deployment.

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