-- Attempting native bridge of SIP/2201-2e1f and SIP/freecall.net.au-453f
Nov  9 15:53:44 NOTICE[710]: channel.c:1731 ast_set_read_format: Unable to find a path from G729A to ULAW
Nov  9 15:53:44 NOTICE[710]: channel.c:1698 ast_set_write_format: Unable to find a path from ULAW to G729A
Nov  9 15:53:44 WARNING[710]: dsp.c:1468 ast_dsp_process: Inband DTMF is not supported on codec unknown. Use RFC2833
Nov  9 15:53:44 WARNING[710]: chan_sip.c:1814 sip_write: Asked to transmit frame type 256, while native formats is 4 (read/write = 4/4)
Nov  9 15:53:44 WARNING[710]: channel.c:2137 ast_channel_make_compatible: No path to translate from SIP/2201-2e1f(4) to SIP/freecall.net.au-453f(256)
Nov  9 15:53:44 WARNING[710]: channel.c:2682 ast_channel_bridge: Can't make SIP/2201-2e1f and SIP/freecall.net.au-453f compatible
Nov  9 15:53:44 WARNING[710]: res_features.c:368 ast_bridge_call: Bridge failed on channels SIP/2201-2e1f and SIP/freecall.net.au-453f