Hello, We're trying to receive faxes on the Asterisk server, but for the time being T.38 negotiation fails.
The SDP that the Asterisk reINVITE sends contains these lines: ---------------------- m=image 4968 udptl t38 a=T38FaxVersion:0 a=T38MaxBitRate:9600 a=T38FaxFillBitRemoval a=T38FaxTranscodingMMR a=T38FaxTranscodingJBIG a=T38FaxRateManagement:transferredTCF a=T38FaxMaxDatagram:1400 a=T38FaxUdpEC:t38UDPRedundancy ---------------------- The MaxDatagram and MaxBitRate are definitely not what they should be, and maybe other parameters are also wrong. I would like to have 400 and 14400 respectively. That's the udptl.conf: ---------------------- ; ; UDPTL Configuration (UDPTL is one of the transports for T.38) ; [general] ; ; UDPTL start and UDPTL end configure start and end addresses ; udptlstart=4000 udptlend=4999 ; ; Whether to enable or disable UDP checksums on UDPTL traffic ; ;udptlchecksums=no ; ; The number of error correction entries in a UDPTL packet ; udptlfecentries = 3 ; ; The error correction type to be sent ; ;T38FaxUdpEC = t38UDPFEC T38FaxUdpEC = t38UDPRedundancy ; ; The maximum length of a UDPTL packet ; ;T38FaxMaxBuffer = 200 T38FaxMaxDatagram = 400 VoipFaxMaxRate = 5 ; The span over which parity is calculated for FEC in a UDPTL packet ; udptlfecspan = 3 ; ; Some VoIP providers will only accept an offer with an even-numbered ; UDPTL port. Set this option so that Asterisk will only attempt to use ; even-numbered ports when negotiating T.38. Default is no. use_even_ports = yes ---------------------- Can anyone help us identify the problem? Thanks, Andreas _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users