This corpus comprises 8,206 entries including stocks, person names, digit strings and 8,511 speech files composed of spontaneous speech, uttered by 50 speakers of different dialects, ages and various educational levels (22 males and 28 females), recorded from a stand microphone (SHURE SM58). Speech samples are stored as a sequence of 16-bit 44.1kHz WAV for a total of 24 hours of speech. The total capacity of the data is 7 Gb. Text files are stored in Unicode format. All data have been proofread manually. The transcriptions include non-speech markers (background noise, background speech, speaker sounds) as well as markers for mispronunciation, channel distortions, words left-out and duplicates. The corpus aims to be applied to the testing and telephone natural speech recognition system.