| Event Id | 20060 |
| Source | POP Intrusion Detection Filter |
| Description | Listening for Q.931 connections failed. Some other process is probably listening on port 1720. The service cannot start. |
| Event Information | According To Microsoft: The required port may be in use by a different application. Resolution: Close any application that may be using this port, then try to restart the service. |
| Reference Links | Microsoft product: Internet Security and Acceleration Server Version: 4.0.3443.594 Event Source: POP Intrusion Detection Filter Event ID: 20060 |
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