referring now to fig2 there is disclosed a block diagram showing the components of an exemplary call processor which enables the present invention to detect a request for service from an incoming caller and direct such caller to an internal extension . upon receipt of a ring on an incoming call , a ring detector provides a dc output which triggers a hold / disconnect timer and a default timer at the end of the first ring . the hold / disconnect timer remains on for the duration of the call and provides an output to both a t driver , which is abbreviated for trunk relay driver , a s driver , which is abbreviated for station relay driver . the hold / disconnect timer also provides an output to ct 1 and ct 2 latches . these drivers merely amplify the dc signal to actuate their respective trunk and station relays . a loop current sensor provides an output to the hold / disconnect timer and a trunk transformer as long as the calling party is on the line . the default timer is actuated by the ring detector and provides an output to the &# 34 ; o &# 34 ; timer , abbreviated for operator timer , for a predetermined time after the end of the first ring . if the caller fails to begin to dial an extension before the predetermined period ends , the &# 34 ; o &# 34 ; timer provides an output to the dtmf transmitter , abbreviated for dual tone multi - frequency transmitter , and a ct 1 latch . the ct 1 latch provides a line to a cut through driver which amplifies the dc signal and energizes a cut through relay . once the cut through relay is energized a trunk transformer and a station transformer are connected in series and provide an audio path from the trunk to the station in addition to providing dc isolation . the &# 34 ; o &# 34 ; timer also provides a signal to the dtmf transmitter which will send the predetermined signal , a touch tone for the desired extension , to the cut through relay for transmission to the desired extension which typically would be a live operator . the pbx receives the signal and connects the call . unless the call is answered very quickly the caller will begin hearing a ringing sound generated from the pbx . in the event the incoming caller dials the first digit of an extension prior to the predetermined set time of the default timer , the touch tone signal corresponding to the dialed digit is received by a dtmf receiver . the dtmf receiver , upon receipt of the tone dialed by the caller , forces the dtmf transmitter to regenerate the same tone and also provides an output to the ct 2 latch in the event the caller dialed a valid touch tone corresponding to an appropriate extension . the ct 2 latch provides a connection to the cut through driver which again amplifies the dc signal adequate to energize the cut through relay which connects the trunk transformer and station transformer . this provides an audio path to the appropriate extension . again the caller will receive a ringing sound from the pbx unless the call is answered before the ringing begins . in the event the extension is busy or does not answer within a predetermined time period the call processor could be modified to transfer the incoming caller to a predetermined extension such as an operator . if the caller begins dialing an extension but fails to complete dialing , the pbx will treat it like any incompletely dialed call and generate a fast busy signal . the dtmf receiver also provides an output to a new dial tone timer whenever a predetermined signal such as an asterisk is dialed . accordingly , if the extension dialed is busy , or if the call is completed to the desired extension , the caller may dial an asterisk and begin the process over by dialing any other extension he desires to reach . fig3 discloses a flow chart showing the sequence of the embodiment of fig2 including the addition of providing the caller with the opportunity to make additional connections without having to redial the number . as seen in fig3 with numerals referencing relevant steps , when a caller dials a number 10 he receives a standard telephone system ring 11 . the pbx receives the call 13 . if the caller does nothing after a predetermined time after the end of the first ring 12 , the caller receives additional ringing sounds 14 . the system then transfers the caller to a predetermined extension 15 . after the call is completed at the extension 17 , the caller may dial a predetermined signal 18 which provides a dial tone 19 to the caller whereby the caller may dial any extension 20 . if there is no answer at the predetermined extension 21 , the caller may either hang up and redial 22 or the caller may dial the predetermined signal 18 , obtaining a dial tone 19 and thus dial any extension 20 . instead of doing nothing after receiving the standard telephone ring , a caller may begin dialing an extension after the first ring 23 . if the caller completes dialing the extension 25 , the caller will receive additional ringing sounds 26 while the system transfers caller to the dialed extension . if the line is busy 27 or the caller fails to complete dialing within a predetermined time period 28 , after which the system produces a fast busy signal 29 , the caller may either hang up and redial 22 or dial the predetermined signal 18 , obtain a dial tone 19 and dial any extension 20 .