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Cisco IOS Software Releases 12.1 Special and Early Deployments

Cisco IOS Software Release 12.1(5)YD

Document ID: 20327




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Description of the Release

 

X Release:
Cisco IOS Software® Release 12.1(5)YD is an ED release (XED) optimized for the IAD2420, Cisco 2600 and Cisco 3600 Series routers. This release is based upon the 12.1(5)T maintenance release.  This release introduces support for IOS Telephony Services - IP Keyswitch and Survivability Remote Site Telephony. Any early deployment (XED) release of software should be used in a test network before being deployed in a production network.

Product and Feature Support

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Features

The Cisco IOS Software Release 12.1(5)YD will support the following platforms: 
 
Product/Feature Image name Memory 
Requirements
Cisco IAD 2420 c2420-a2i8sv5-mz
See Release Note
Cisco 2600 Series  c2600-do3s-mz
c2600-ik2o3s-mz
c2600-io3s56i-mz
c2600-is-mz
c2600-is56i-mz
c2600-jk2o3s-mz
c2600-jk2s-mz
c2600-jo3s56i-mz
c2600-js-mz
c2600-js56i-mz
c2600-jsx-mz
See Release Note
Cisco 3620 Series c3620-do3s-mz
c3620-ik2o3s-mz
c3620-io3s56i-mz
c3620-is-mz
c3620-is56i-mz
c3620-jk2o3s-mz
c3620-jk2s-mz
c3620-jo3s56i-mz
c3620-js-mz
c3620-js56i-mz
c3620-jsx-mz
See Release Note
Cisco 3640 Series c3640-do3s-mz
c3640-ik2o3s-mz
c3640-io3s56i-mz
c3640-is-mz
c3640-is56i-mz
c3640-jk2o3s-mz
c3640-jk2s-mz
c3640-jo3s56i-mz
c3640-js-mz
c3640-js56i-mz
c3640-jsx-mz
See Release Note
Cisco 3660 Series c3660-do3s-mz
c3660-ik2o3s-mz
c3660-io3s56i-mz
c3660-is-mz
c3660-is56i-mz
c3660-jk2o3s-mz
c3660-jk2s-mz
c3660-jo3s56i-mz
c3660-js-mz
c3660-js56i-mz
c3660-jsx-mz
See Release Note

Feature Description

Cisco IOS Software Release 12.1(5)YD is an XED release optimized for the Cisco IAD2400 Series Business Class Integrated Access Device, Cisco 2600 and Cisco 3600 Series Routers, IOS Telephony Services - IP Keyswitch. 
The IP Keyswitch function integrates call processing in IOS for enterprise branch offices or for service provider managed services for Small Medium Businesses. Customers that use Cisco 2600 or 3600 series multi-service routers can now add this capability by a simple IOS software upgrade, and provide integrated telephony services for IP phones such as the Cisco Telecaster 79xx. A rich set of phone features such as forwarding, transfer, hold, and multi-line appearance are also supported. The IP Keyswitch function will support up to 48 phones or IOS devices depending on the platform.

Survivable Remote Site Telephony

Enterprise customers wishing to deploy IP telephony at their branch offices using a centralized CallManager architecture are very interested in call-processing redundancy capabilities at these remote sites. Such redundancy ensures negligible impact to the business in case a Wide Area Network outage prevents the centralized CallManager from being able to process telephony requests from IP phones at the branch office. The Survivable Remote Site Telephony feature integrates call processing capability directly into OS, enabling the Cisco 2600 or 3600 series router at the branch office to provide telephony redundancy.

Note: The features delivered with this XED release will be immediately incorporated into Cisco IOS Software Release 12.2(3)T and subsequent Cisco IOS 12.2T releases. 

Support Pages

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

For more information, consult the following web pages: 

Release Documentation

Parent Release Documentation Other Links
  • Cisco IOS Field Notices
  • Cisco IOS Reference Guide
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Target Market

 
Cisco Systems, Inc. released Cisco IOS Software Release 12.1(5)YD as a short lived release for the Cisco IAD 2420, Cisco 2600 and 3600 Series routers.

Lifecycle of Release

Cisco IOS Reference Guide
 
Milestones Y2K Compliance Release Designation
CCO FCS: March 19, 2001

MFG FCS: March 26, 2001

EOS: 

EOE:

EOL:

Yes XED Release
Maintenance Releases
 
CCO customers can view the Projected Release Dates for Cisco IOS Software Product Bulletin

It is highly recommended that Release Notes are used to determine if a maintenance release should be used. Release Notes provide announcements of new features and a summary of known caveats at the time of the renumber. 

Maintenance Cycle: Download Image
No maintenance plans for this X release.
These features will also FCS in 12.2(3)T
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Interim Builds Short-lived X releases do not provide interim builds. 

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Recommended Customer Migration Path

 

12.1(5)YD is expected to migrate to 12.2(8)T .

To view the projected release date of Cisco IOS Software Release 12.1(5)YD, see the
Projected Release Dates for Cisco IOS Software Product Bulletin



Updated: Feb 19, 2003 Document ID: 20327