[asterisk-users] WARNING[31046]: chan_sip.c:4978 process_sdp: Unable to lookup host in c= line, 'IN IP4 100101'

[Mark Michelson]

Andrew Joakimsen wrote:
> Anyone else have issues with T.38 where the call drops after T.38 is
> attempted to be negotiated, with a message like the below?
> 
>  WARNING[31046]: chan_sip.c:4978 process_sdp: Unable to lookup host in
> c= line, 'IN IP4 100101'

The problem is that 100101 is neither a valid IPv4 address nor a fully-qualified 
domain name.