I just switched our ISDN PRI line from Avaya G430 to Asterisk with Digium T133 and getting the following error.
[2015-01-25 12:22:29] WARNING[17313][C-000004c6]: channel.c:4860 ast_prod: Prodding channel ‘SIP/192.168.3.9-00000511’ failed
[2015-01-25 12:23:54] WARNING[17341][C-000004cb]: channel.c:4860 ast_prod: Prodding channel ‘SIP/192.168.3.9-00000516’ failed
Please advise as I’m getting this error frequently.