[Cybertoy]

Hi,

I use asterisk and thus my ipkall number points directly to my server. I seem to have a problem with touch tones coming through though. My asterisk picks up the phone and based on the user's input connects to my cellphone, work extension, or home landline. It seems like the touchtones are coming through twice so when the user punches 1 it receives 11.

Here's my asterisk sip.conf configuration for the ipkall calls:

[ipkall]
type=peer
dtmfmode=rfc2833
context=default
insecure=very
host=voiper.ipkall.com
nat=yes

has anyone seen this problem and knows how to fix it?

ciao,

Cybertoy

[anest]

i has fix this problem on my asterisk few weeks ago.
i just set up codec ulaw (for now sound very good and very clear after setup QoS) and global set dtmfmode=auto (you can try also =inband)

hope its will help you

[olden]

Hi Cybertoy,

I do have exactly the same problem, digits sometimes come 2 or 3x (ie dialing 456 could translates in Asterisk decoding 445666).
As far as I can tell, this problem is specific to IPKall, ie DTMF works perfect with my 2 others VoIP providers.
I'm using the Asterisk 1.0.11.1 (most recent 1.0x); tried switching codecs, playing with jitterbuffer etc, didn't find a workaround (besides using another carrier).

I suspect that IPKall explicitely turned off RFC2833 and SIP INFO and (for a reason that eludes me) transmits DTMF tones in-band only, making them very vulnerable to jitter etc.

Anyone having more info/suggestions/solutions?
Better yet, anyone from IPKall?..

Thanks all

[mberlant]

Olden,

How are you calling to IPKall when placing these test calls? If you are using a VoIP service you are introducing unknowns into the test calls that may be adversely affecting the results. This could be true especially if you are located outside the USA or are using a VoIP or Calling Card service provider who is located outside the USA to originate these test calls.

[olden]

Hi mberlant,

All test calls were originating from California; tried 2 landlines and my cellphone with identical results.
No calling card, VoIP to reach IPKall etc.

It seems like IPKall uses Asterisk. Could it be that their SIP 'dtmfmode' setting is 'inband'? If yes, maybe a little bit of "choppiness" could cause my own PBX at the other end to sometimes detect multiple tones..?

Thanks for your interest, have a great week-end!

[tehcall]

Yes I have been expirencing this as well. It just started not that long ago.
Its always have been fine until recenly.
Mine are coming from the 360226, 360227.
I'm glad to hear that Im not the only person that had this. My IPKALL numbers seem to be working properly now though.