[Asterisk-Users] Re: Grandstream Early Dial

[Josh Roberson]

I've never had early dial working, however, I resolved my multiple digit
issue by simply putting both the GS phones and asterisk in INFO mode.
This worked on both 10.0.3.81 firmware on the budgetone and the ATA286,
as well as 10.0.4.30 firmware.  I'm not saying I don't believe you, but
doubelcheck your lines in asterisk to be dtmfmode=info and the gs
devices are on SIP INFO method, and your DTMF Payload type is 101.

Just my $.02

--------------------------
Josh Roberson
Indigent Networks
1.877.677.9647 x1
twisted at indigent.sytes.net

> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com [mailto:asterisk-users-
> admin at lists.digium.com] On Behalf Of Stephen R. Besch
> Sent: Wednesday, December 31, 2003 12:59 PM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Re: Grandstream Early Dial
> 
> 
> > I've just checked my voicemail with 1.0.4.30 and get the same
multiple
> > digits problem. sip.conf and GS config are both at info, for me this
is
> > a new problem voicemail has always worked perfectly with the GS.
> >
> This has come up many times in this list, with no consensus for a
> solution.  According to Grandstream, the "multiple digit" problem
arises
> from a difference in the interpretation of the SIP standard. I'm not
> sure I really understand this, so no flames please, but, paraphrasing
a
> conversation I had with GS, apparently they retransmit the digit as
long
> as the key is pressed and expect asterisk to know that it is a
> re-transmission by examining other data in the packet. Asterisk does
not
> handle the SIP packet in the way GS expects, resulting in multiple
digit
> transmission. This flaw (?) is avoided by setting DTMF to INBAND.  Why
> this behaviour is not repeatable on everyones installations escapes
me.
> However, I have noticed one thing that may be a clue. I have one phone
> that is older hardware (redial button instead of send and an unused
> battery compartment on the bottom). This phone behaves differently
than
> all the other, later, models.  For example, it is the only phone on
> which the flash button actually works to answer the alternate line (eg
> when an incoming call waiting call arrives). All phones are using 3.81
> firmware.
> 
>  > Early dial has never worked for me, and I just upgraded to the
>  > 1.0.4.30 load yesterday. Now, I am having DTMF recognition issues,
>  > making it impossible to check my voice mail.
> 
> This is an acknowleged bug on the GS.  They have connected to my *
> server and acknowleged the problem. A fix has been promised but not
yet
> delivered.  Until then, the only solution is to turn early dial off
and
> let the phone send the entire dial string in one packet.  Since this
> does not affect later single digit transmission for IVR's, etc, the
only
> consequence is the irritating delay between the last entered digit and
> the actual placing of the call. But, you can always hit the send key.
> 
> Stephen R. Besch
> 
> 
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