All of our interpreters and translators are certified in medical and legal terminology. Subscribing to the over-the-phone interpreter services saves you time and money (many times you only need a few sentences interpreted) With access to interpreters from many languages and all over the U.S. we'll be able to interpret whenever and whatever you need. Interpreters On Call 1548 N. Columbia Place Tulsa, Oklahoma 74110 Phone No.: 918-838-1730 E-mail: interpretersoncall@hotmail.com Internet: http://www.mamut.com/interpretersoncall