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: [email protected] 
  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 <[email protected]> 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 <[email protected]> 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 <[email protected]>:

      > 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 <[email protected]> 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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      >
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  -- 
  Anthony Minessale II

  FreeSWITCH http://www.freeswitch.org/
  ClueCon http://www.cluecon.com/
  Twitter: http://twitter.com/FreeSWITCH_wire

  AIM: anthm
  MSN:[email protected]
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  pstn:213-799-1400



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