What is "Telephony" in my Windows XP service list? And how is "Telephony" service related to TapiSrv.dll?

"Telephony" is a Windows XP service that "Provides Telephony API (TAPI) support for programs that control telephony devices on the local computer and, through the LAN, on servers that are also running the service." "Telephony" service is provided by TapiSrv.dll DLL file.

Detailed information on "Telephony" service:

Service name: TapiSrv
Display name: Telephony
Execution command: C:\Windows\System32\svchost.exe -k NetworkService
Start type: Manual
Service status: Stopped
Dependencies:
   Plug and Play
   Remote Procedure Call (RPC)

"Telephony" service is provided by a DLL file called: TapiSrv.dll:

Name: TapiSrv.dll
Location: C:\Windows\System32\TapiSrv.dll
Description: Telephony
File version: 6.1.7601.17514
Size: 236 KB (242,176 bytes)
Modified: Saturday, November 20, 2010, 7:21:28 AM

Disabling "Telephony" service should not cause any issues when running Windows XP system.

⇒"svchost.exe -k NetworkService" Services on Windows XP

⇒⇒Windows XP Services Tutorials