Toshiba DKT-2010H Corded Phone ringing in my ear..

Have a look under the phone to see if there are any switches. Normally the is a 3 possition switch for two types of ring tone and a off possition.

check that the DND button is not lit up and check that the volume is up.

You can get your entire manual here:
http://www.p1bc.com/toshiba/toshiba_dkt_2/DKT2010-H.htm

Sounds like the station is in do not disturb mode.Internal, external and transfered calls do not ring but the station can still make calls. there should be a lit button on the set maybe marked do not disturb or DND. press the button again to turn the led off. hope that helps

Do you mean send the call to another phone?
Make sure the line is not on hold (push the caller's line) then push Cnf/Trn, dial the extension you want the call to go to, then hang up.
The person you're sending to will receive that call on their speakerphone button and it will ring in a different tone.

http://toshibasets.com/uploads/Strata_DK_user_guide.pdf

which system?
The most popular is the DK system but it came in several revisions.
The primary differences are the way the ports are numbered and several program numbers.
Programming is done from port 005(ext 205).
The sequence of events is:
enter programming mode by pressing "speaker *#*#1*2*3"
enter ringing program
Day ring is "spkr 81 hold"
enter port number of the port you want to ring (example : 007#)
press buttons corresponding to the lines you want to ring then press hold.
To exit programming press"spkr ## hold then spkr ## hold.

intercom # key 409 then press speaker.

program 80 on your programming manual.

When you press any button the speaker will make a quick beep. Is this what you are asking about or are you asking about the DTMF tones when you press a number button 1-9,0,*,#