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!

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 7:00 AM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] FreeSWITCH+Sangoma with dialup modems

On Mon, Dec 10, 2012 at 2:40 AM, Sirish Masur Mohan <Sirish.MasurMohan@oa.com.au> wrote:

My setup is as follows:
Serial port based device(Caller)->Dlink dialup modem(DFM562E)->PBX->Sangoma A102 E1 Link(and FreeSWITCH)->PBX->Dlink dialup modem(DFM562E)->Server(Receiver)

Problem:
When the caller makes the call (using the modem with a lower baud rate 1200), Receiver modem receives the RING and answers the call (using the ATA command). But for some reason, both the ends timeout waiting for modem CONNECT.

Are you sure there is no echo cancellers in the middle (make sure you have an A102 without echo canceller or that you disable it in wanpipe). You can always make sure you disable the ec in the dialplan too (<action application="disable_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