Call patterns in a communications network

Call queuing utilization reporting

Call redirection feature for relay services

Call reporting

Call toll processing method and call toll processing apparatus

Call tracker

Call traffic control

Call transfer and conference with separate billing records...

Call validation system

Call-accounting system

Call-connecting device, call-connecting method,...

Call-disposition analyzer

Call-processing system and method

Call-processing system and method

Called party response detecting apparatus

Calling card validation system and method therefor

Calling line identification adjunct for use with a communication

Calling party identification announcement service

Calling party-paid wireless telephone service

Calling-party-pays call processing for cellular and paging