Could someone tell me why I would get this using a linejack POTS May 20 17:43:05 WARNING[1217602880]: chan_phone.c:417 phone_read: Error reading: Resource temporarily unavailable May 20 17:43:05 WARNING[1217602880]: app_festival.c:181 send_waveform_to_channel : Null frame == hangup() detected May 20 17:43:05 WARNING[1217602880]: file.c:521 ast_readaudio_callback: Failed tto write frame Thankyou