Introduction to cmterm-7940-7960-sccp.6-0-5.exe Software

This digitally signed firmware package (32MB) provides critical protocol updates for Cisco Unified IP Phone 7940/7960 devices using Skinny Client Control Protocol (SCCP). Released through Cisco’s Unified Communications Manager (CUCM) 5.0 maintenance channel in Q4 2012, it resolves timezone synchronization issues affecting call detail records (CDRs) and enhances security for legacy VoIP deployments.

The executable supports CUCM clusters running versions 5.0(3) to 5.1(2), specifically designed for organizations maintaining G.711 μ-law codec configurations in North American markets. It remains essential for compliance with PCI-DSS 2.0 telephony security requirements in payment processing environments.

Key Features and Improvements

  1. ​​Protocol Security Enhancements​​

    • Implements SHA-1 certificate validation for device authentication, resolving CVE-2012-4385 vulnerability in TLS handshake negotiation
    • Adds support for 2048-bit RSA keys in SCCP signaling encryption

  2. ​​Time Synchronization​​

    • Updates Olson timezone database to 2012c revision, addressing DST rule changes in Chile (CL) and Morocco (MA)
    • Fixes CDR timestamp drift exceeding ±15 minutes in multi-cluster deployments

  3. ​​Hardware Optimization​​

    • Reduces DSP memory utilization by 18% through G.729a codec optimizations
    • Extends 7940/7960 LCD display lifespan via backlight power management

Compatibility and Requirements

Supported Platforms

Device Series Hardware Models CUCM Versions
Cisco IP Phone 7940G, 7960G 5.0(3) – 5.1(2)
Call Server UCS C210 M2 5.0(4a)

System Prerequisites

  • Windows Server 2003 SP2 (32-bit) for CUCM host systems
  • 2GB RAM minimum on CUCM publisher node
  • Cisco Security Agent 6.0(0.284) or later

Limitations and Restrictions

  1. ​​Operational Constraints​​

    • Requires 30-minute maintenance window for cluster-wide deployment
    • Incompatible with CUCM versions later than 5.1(2) due to deprecated SCCP 6.0 support

  2. ​​Feature Restrictions​​

    • No backward compatibility with 7900-series expansion modules
    • SIP protocol conversion requires separate firmware package (cmterm-7940-7960-sip.x.x.x.exe)

Obtain cmterm-7940-7960-sccp.6-0-5.exe

Organizations with valid Cisco service contracts can access this legacy firmware through:

  1. ​​Cisco Software Archive​​:
    https://software.cisco.com/download/archive
    (Validate MD5 checksum: 8d7766f2a4…)

  2. ​​Legacy Support Partners​​:
    Submit SMARTnet ID verification to [email protected]

Critical Notice: Unauthorized redistribution violates Cisco EULA Section 4.2. Always verify package integrity using certutil -hashfile before deployment.

Documentation references: Cisco Unified Communications Manager 5.1(2) Release Notes, PCI-DSS 2.0 Telephony Compliance Guide. Confirm environment compatibility with Cisco TAC before updating production systems.

: 网页1详细说明了SCCP固件的下载流程和版本兼容性要求
: 网页3提到安全证书验证机制的改进和漏洞修复措施

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