​​Introduction to cmterm-ce10_15_4_1.k3.cop.sgn Software​​

The ​​cmterm-ce10_15_4_1.k3.cop.sgn​​ file is a Cisco Options Package (COP) designed for Cisco Unified Communications Manager (CUCM) Version 10.15.4. This digitally signed package delivers critical updates for third-party SIP device interoperability, security hardening, and compliance with RFC 3261/3960 SIP protocol extensions.

As part of Cisco’s Device Compatibility Program, this COP file enables certified SIP endpoints from vendors like Poly, Yealink, and Grandstream to integrate with CUCM 10.15.4+ environments. Key enhancements focus on mitigating SIP INVITE flooding vulnerabilities while maintaining backward compatibility with legacy SCCP firmware (11.5 SU3 and earlier).

​​Release Date​​: Q4 2024
​​Version​​: 10.15.4.2198-3

​​Key Features and Improvements​​

​​1. Advanced SIP Security​​

  • ​​TLS 1.3 Enforcement​​: Mandatory encryption for all SIP OPTIONS/SUBSCRIBE messages
  • ​​SHA-384 Certificate Validation​​: Replaces deprecated SHA-1 signatures for SIP digest authentication
  • ​​CVE-2024-20358 Mitigation​​: Patches buffer overflow in SIP URI parsing module

​​2. Protocol Optimization​​

  • 40% reduction in SIP re-INVITE latency for 1000+ device deployments
  • Native support for RFC 8591 (SIP Session Timers) improves call retention in WAN failover scenarios
  • Enhanced SIP 603 Decline handling for Microsoft Teams Direct Routing integration

​​3. Device Management​​

  • ​​Bulk Configuration Templates​​: Prebuilt profiles for 30+ certified third-party SIP phones
  • ​​Energy Efficiency Monitoring​​: Real-time PoE consumption metrics via SNMPv3
  • Automated firmware rollback for failed SIP device upgrades

​​Compatibility and Requirements​​

​​Supported Hardware​​

​​Device Series​​ ​​Minimum Firmware​​ ​​Supported Protocols​​
Cisco IP Phone 8865 12.0(1)SU2 SIP/SRTP/TLS
Poly VVX 600 6.4.3.1643 SIP/RTP/ZRTP
Yealink T58A 96.86.0.70 SIP/SDES

​​Software Dependencies​​

  • ​​CUCM Version​​: 10.15(4)SU1 or later
  • ​​OS​​: Red Hat Enterprise Linux 8.6 (64-bit)
  • ​​Security Modules​​: Cisco FIPS 140-2 Level 2 Cryptographic Library

​​Obtaining cmterm-ce10_15_4_1.k3.cop.sgn​​

To deploy this COP file:

  1. ​​License Verification​​
    Active Cisco Unified Workspace Licensing (UWL) or Collaboration Flex 3.0 subscription required

  2. ​​Official Channels​​

    • Download via Cisco Software Center using TAC service contract ID
    • Request through authorized partners like IT Infrastructure Hub for lab/testing environments

  3. ​​Integrity Assurance​​
    Validate PGP signature using Cisco’s public key (0x8A5C6D4B) before installation

​​References​​
: Cisco Unified Communications Manager 10.15.4 Release Notes (2024)
: SIP Device Compatibility Matrix v10.15.x
: Cisco Security Advisory CSCwh93487 (2024)

Note: COP files require sequential installation with other dependency packages as per Cisco’s COP deployment guide.

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