This report describes a telephone speech corpus collected at the Oregon Graduate Institute's Center for Spoken Language Understanding. Over four thousand people called in response to public requests. They were prompted by a recorded voice to say and spell their first and last names---with and without pauses, to say what city they grew up in and what city they were calling from, and to answer two yes/no questions. In order to collect sufficient instances of each letter, about 1000 callers also recited the alphabet. Each call is checked and transcribed by two people. In addition, a subset of the calls is being phonetically labeled. INTRODUCTION A successful telephone speech recognition system must deal with variations among speakers, telephone handsets, and channel characteristics. Modeling these sources of variability requires a corpus of speech samples provided by many speakers calling from different locations using different telephones. We describe the status of a telephone speech c...