Thanks Moises, noted!

With regards,

Sirish

From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Moises Silva
Sent: Tuesday, 11 December 2012 4:22 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] FreeSWITCH+Sangoma with dialup modems

On Mon, Dec 10, 2012 at 9:24 PM, Sirish Masur Mohan <Sirish.MasurMohan@oa.com.au> wrote:

Hi Moises,

Thanks for the reply. I have been able to resolve this issue – looks like I had to explicitly choose the modem carrier (1200) using the +MS command.
However, curious to know a bit more on the echo canceller that you are referring to – we are using the Sangoma card with echo canceller, and I haven’t explicitly turned it off!

Echo cancellation is not a good idea in data calls. Mind you, depending on the type of data call there is variable tolerance. Also, some data calls (ie fax) start by sending a well-known tone that Sangoma echo canceller recognizes and then disables itself (see CED tone here: http://telecom.tbi.net/fax-call.htm).

If it's working for you, good :) ... if you start having issues with some calls succeeding some not, now you know another thing to try (turn off the ec).

Moises Silva
Manager, Software Engineering

msilva@sangoma.com

Sangoma Technologies

100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada

t. +1 800 388 2475 (N. America)

t. +1 905 474 1990 x128

f. +1 905 474 9223