43b7af74_vices_List___Overclockers_Club__Notes
[Service Name] Telephony [Recommended Setting] Automatic/Disable* [Notes] 
If you're on dialup leave this alone. However if you got Cable, DSL with router, LAN connection disable it. A guy named Craig, emailed me and told me that if your dsl is PPPoE, then you need to turn this service on. However, if your DSL goes thru your router, like myself, you can disable this service.
Windows XP Services Removal Guide » Page 2 - Windows Services List - Overclockers Club
Notes