Cisco Cisco IOS Software Release 12.3(4)T

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Private Line Automatic Ringdown for Trading 
Turrets
The Private Line Automatic Ringdown for Trading Turrets feature improves connection service for 
turrets in the financial industry—primarily for corporations and enterprises that use turrets and POTS 
telephones for trading. Implementation of this feature ensures that a call between traders on a private 
line automatic ringdown (PLAR) connection will be maintained if one of the traders goes on-hook or 
on-hold. This new capability also ensures that bandwidth is used only when needed.
Feature History for Private LIne Automatic Ringdown for Trading Turrets
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 
. You must have an account on 
Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear. 
Contents
Feature History
Release
Modification
12.2(15)ZJ
This feature was introduced.
12.3(4)T
This feature was integrated into Cisco IOS Release 12.3(4)T.