[asterisk-users] Data calls through TDM2400E

[Troy Ayers]

Stephen Kratzer wrote:
> Hello. Has anyone been able to successfully make data (dialup modem) calls 
> through a TDM2400E? We're able to make fax and credit card calls fine, but 
> cannot successfully make modem calls using a 56K modem connected to a patch 
> panel connected to an FXS port which then gets bridged to an FXO port 
> connected directly to a phone line. We have 'echocancelwhenbridged=no' set 
> in /etc/asterisk/zapata.conf.  We're dialing into a Lucent TNT which drops 
> the call with a cause code of 11 (DCD-Detected-Then-Inactive. The modem 
> detected DCD, but became inactive). The modem call works fine when connected 
> directly to a phone line. Is there anything else that I can do to get this 
> working? Thanks.
I dunno about TDM2400E, but perhaps you might get a connection if you 
could slow the modem down by using the appropriate "extra settings" for 
the modem (IE +ms=v34 or -v90=0 etc) to force a non 56K/v90 connection?

-Troy