[Freeswitch-users] SIP Overlap support?

Tue Oct 13 13:22:00 PDT 2009

As evidenced by various DTMF interop issues (with RFC2833, inband, etc) over the years, I would avoid it if at all possible.  

What does it particularly do that can not accomplished by using RFC 2833 or (less ideal) inband DTMF?  Or are you attempting to use it as a band-aid to address some sort of interop issue with the carrier involved that is wrecking havoc with your particular application?

-metik
  ----- Original Message ----- 
  From: Tihomir Culjaga 
  To: freeswitch-users at lists.freeswitch.org 
  Sent: Tuesday, October 13, 2009 3:24 PM
  Subject: Re: [Freeswitch-users] SIP Overlap support?

  i never found it working properly... i always had some interoperability issues and i finished having a "dialplan" on my phones being delivered through a config file via tftp or http .. depending of the phone capability.

  BTW: using overlap can lead to a greater system load... be careful when setting the minimum number of digits you will send in 1st message. I wish you luck...

  T.

  On Tue, Oct 13, 2009 at 9:03 PM, Metik <freeswitch-users-list at metik.com> wrote:

    Both support it.  In the Grandstream, I believe it is called Early Dial (vs. SNOM's Overlap Dialing).  It can be problematic if you have a device somewhere in the middle that doesn't support 484s.

    -metik
      ----- Original Message ----- 
      From: Anthony Minessale 
      To: freeswitch-users at lists.freeswitch.org 
      Sent: Tuesday, October 13, 2009 2:01 PM
      Subject: Re: [Freeswitch-users] SIP Overlap support?

      i do think some softphone can do it but i forgot which one it was either snom or grandstream

      On Tue, Oct 13, 2009 at 12:12 PM, Tihomir Culjaga <tculjaga at gmail.com> wrote:

        you need a softswitch.... i'm afraid a SIP phone is not designed for overlap...

        T. 

        On Tue, Oct 13, 2009 at 5:26 PM, Dennis <odermann at googlemail.com> wrote:

          how could we try? we played arround with a snom phone (snom seems to
          support something in this direction, but are not shure, how we can
          test it and how we can see if it is supported or not.

          any hint?

          2009/10/13 Anthony Minessale <anthony.minessale at gmail.com>:

          > have you tried it?
          > I *think* either we did support it or we would with a small patch to sofia
          > lib that I cannot recall if we ever got committed.
          >
          >
          > On Tue, Oct 13, 2009 at 8:51 AM, Dennis <odermann at googlemail.com> wrote:
          >>
          >> hi there,
          >>
          >> i would like to ask, if fs has support for something like "SIP Overlap"?
          >>
          >> instead of receiving the phonenumber from our carrier in a block, we
          >> want to receive the phonenumber digit-by-digit and we want to tell fs
          >> when the number is complete. our carrier could send us the phonenumber
          >> digit-by-digit, but what about the fs-side?
          >>
          >>
          >> thanks and kind regards
          >> dennis
          >>
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          >
          > --
          > Anthony Minessale II
          >
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      -- 
      Anthony Minessale II

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