[MSDN Library June 1998] Digit Monitoring (64.7584033613445%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Overviews > Supplementary Line Functions > Call Monitoring

[MSDN Library June 1998] Digit Monitoring (52.1786492374728%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TSPI Version 2.1 > Overviews > Line Devices > Supplementary Line Services > Monitoring

[MSDN Library June 1998] Digit Gathering (34.7154139433551%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TSPI Version 2.1 > Overviews > Line Devices > Supplementary Line Services

[MSDN Library June 1998] Digit Gathering (31.608893557423%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Overviews > Supplementary Line Functions