Nortel TAPI User Manual page 119

Draft 0.01
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If upgrading from 2.3.1.x, you will be asked whether to keep the FLEXlm
license manager. Symposium Agent 2.3 requires FLEXlm to be present,
therefore, if you have Symposium Agent 2.3 as part of your solution or plan to
add it in the future you should keep FLEXlm.
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The installation application copies the required files to the installation
directory. A status window displays installation progress.
Network Managers Guide for Symposium TAPI Service Provider for Succession, release 3.0
Chapter 5 Upgrading Symposium TAPI SP 119