[asterisk-dev] IAX Hardphone (again)

Bill Shaw b.shaw at comcast.net
Wed Nov 30 17:47:24 CST 2011

Thanks for the response Kevin.  The capture was done on my development 
system ( Win/XP ),  but all the devices are on the same Ethernet segment 
so it should (in theory) be the same.  Nothing shows on the Asterisk 
console for this 'new' command,  it's just ignored.

The unknown IE is a call token.  Wireshark doesn't know about call 
tokens. Wireshark apparently doesn't display 0 length IEs properly,  but 
it does pick up parsing IEs ok after so it's just a display issue.

I have calls working in the other direction(outgoing) so I really do 
think I'm close to the end on this project.  Once I get through the 
incoming call setup I should be there.



On 11/30/2011 6:09 PM, Kevin P. Fleming wrote:
> On 11/30/2011 04:54 PM, Bill Shaw wrote:
>> Hi All,
>> I'm having trouble with an IAX command and was wondering if someone
>> would take a look and maybe point me in the right direction.
>> I am running Asterisk on CentOS 5.6. When I try to set up an
>> incoming call (my hardphone calling to Asterisk) I issue a 'new' packet
>> that is ignored by Asterisk. There's got to be something wrong with my
>> 'new' packet but I can't see it. I've uploaded a short Wireshark capture
>> file to:
>> http://b.shaw.home.comcast.net/new.pcap
> Did you make this capture *on* the system running Asterisk? Does 
> anything show up on the Asterisk console if you have 'iax2 set debug 
> on' in place?
>> The players here are:
>> - my development system running Zoiper
>> - the Asterisk PBX
>> - my IAX hardphone
>> You can see my 'new' command at packet #28 in the capture. I *think* I
>> got all the required information elements but the command is just
>> ignored by Asterisk so my hardphone just keeps retransmitting it.
> In my version of Wireshark (1.6.2), there is an Unknown IE with a 
> weird value in it (second from the last). What is that?
>> I'm in the final stages of development hoping to be able to ship product
>> soon but I am stuck at this point. If someone could take a look and
>> offer some words of wisdom I'd forever be in your debt.
> If you can't get calls started, it seems like you might be not quite 
> in the 'final stages' of development yet :-)

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