Cisco IOS Software Release 12.4(20)T

NOTE: This product is no longer being sold and might not be supported. View the End-of-Life Notice to learn:
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  • What replacement products are available
  • Information about product support

Cisco IOS Software Release 12.4T integrates a portfolio of new capabilities, including security, voice, and wireless, with powerful hardware support to deliver advanced services for Enterprise and access customers.

Release 12.4(20)T, the latest release of the 12.4T family, adds significant embedded management enhancements, category-based productivity and security ratings support, multi-level Quality of Service (QoS) scheduling, and support for Cisco 860, 880, and 1861 routers.

Like all releases in the 12.4T family, Release 12.4(20)T integrates innovations that span multiple technology areas, including Cisco IOS Security, Voice, Cisco IOS Infrastructure, Access, High Availability, Management Instrumentation, Quality of Service, IP Multicast, Broadband, IP Routing, and IP Services. Release 12.4(20)T delivers these integrated technologies on the broadest range of hardware in the industry, including the Cisco Integrated Services Routers, Cisco 7200 Series, and Cisco 7301 Router.

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