[asterisk-users] iaxmodem errors.

[Larry Moore]

Is your network/firewall configuration permitting the ports for UDPTL, 
runn the command:  udptl show config

    UDPTL Global options
    --------------------
    udptlstart:      4000
    udptlend:        4999
    udptlfecentries: 3
    udptlfecspan:    3
    use_even_ports:  No
    udptlchecksums: Yes

In your sip configuration for your 'mytrunk' peer have you set 
applicable options e.g.:

    t38pt_udptl=yes,redundancy,maxdatagram=400

In your extensions.conf you could and probably should set the following 
option prior to dialing the IAX channel, this is to enable the T.38 
gateway feature of Asterisk 11:

    Set(FAXOPT(gateway)=yes)

I have it working in my installation however I have incoming voice calls 
too hence I use 'faxdetect' to direct the call to the 'fax' extension.

Cheers,

Larry.

On 12/11/2016 5:24 AM, tux john wrote:
> hi. i am using asterisk 11.24.1 in my raspberry. i do have a sip trunk 
> with a provider with g711a. I am trying to setup a fax server by 
> following the guide in http://the-asterisk-book.com/1.6/faxserver.html.
> i do live in Greece and the number is 00302112152130
> the problem is that i am getting the following error and i am stuck:
>   == Using SIP RTP TOS bits 184
>   == Using SIP RTP CoS mark 5
>     -- Executing [00302112152130 at fax-in:1] 
> Dial("SIP/mytrunk-00000001", "IAX2/iaxmodem") in new stack
>     -- Called IAX2/iaxmodem
>     -- Hungup 'IAX2/iaxmodem-3818'
>   == Everyone is busy/congested at this time (1:0/0/1)
>     -- Auto fallthrough, channel 'SIP/mytrunk-00000001' status is 
> 'CHANUNAVAIL'
> RasPBX*CLI>
> the extensions.conf has
> [fax-in]
> exten => 00302112152130,1,Dial(IAX2/iaxmodem)
> any ideas, please?
>
>

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