Article - CS301636
Received TAPI Line Initialization Failed Error in PTC Kepware Products
Modified: 21-Oct-2025
Applies To
- Kepware Server (formerly KEPServerEX) 5.20.396.0 to 6.18
- ThingWorx Kepware Server (legacy) 8.0 to 6.18
Description
- Is it fine to deactivate Windows Telephony service - PhoneSvc?
- Is PhoneSvc mandatory for the operation of PTC Kepware Products?
- Is there a parameter in the settings so that PTC Kepware Products does not use this service?
- Event in Event log stating TAPI Line initialization failed in PTC Kepware Products
- Client receiving error 0x8007042C when trying to connect to PTC Kepware Products
- TAPI line initialization failed with error code 0x80000048
- Error 1068. Failed to start server runtime in service mode: The dependency service or group failed to start
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