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How To Increase DTMF Signal Strength In Swyx 2013
January 7th, 2014

1. Use Regedit to edit the Windows registry on the Swyx Server
2. Navigate to HKEY_LOCAL_MACHINE > SOFTWARE > Wow6432Node > Swyx > LinkMgr > CurrentVersion > Options
3. Right-Click and create a new ‘Key’ registry entry named:- GeneralLinkConfiguration
4. Right-Click ‘GeneralLinkConfiguration’ and select New > DWORD (32-Bit) Value. Name the new DWORD entry DTMFGapDuration
5. Set the DTMFGapDuration to 100
6. Right-Click ‘GeneralLinkConfiguration’ and select New > DWORD (32-Bit) Value. Name the new DWORD entry DTMFToneDuration
7. Set the DTMFGapDuration to 400
8. Right-Click ‘GeneralLinkConfiguration’ and select New > DWORD (32-Bit) Value. Name the new DWORD entry DTMFVolume
9. Set the DTMFGapDuration to 200

For Swyx 2015 please see latest blog: http://www.knowall.net/swyx/how-to-increase-dtmf-signal-strength-in-swyx-2015/