-- Starting simple switch on 'Zap/24-1'
May  9 10:47:06 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)...
May  9 10:47:07 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered)...
May  9 10:47:07 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 17 (Polarity Reversal)...
May  9 10:47:07 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)...
May  9 10:47:07 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 17 (Polarity Reversal)...
May  9 10:47:08 NOTICE[15386]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered)...
May  9 10:47:14 WARNING[15386]: chan_zap.c:6136 ss_thread: CallerID returned with error on channel 'Zap/24-1'
    -- Executing Answer("Zap/24-1", "") in new stack
May  9 10:47:14 WARNING[15386]: chan_zap.c:1419 zt_train_ec: Unable to request echo training on channel 24