asterisk users - Sep 2004 - TDM40B hangup on fax or data modem carrier

Hi !

I have a TDM40B and i try to use it connected to modem for incoming call 
data transfert.

I have no problem to use it with a phone and a talk communication work fine.

But when we try to use with modem, with most modem, we got data carrier for 
few seconds and channel hungup.

< [ TYPE: Null Frame (4) SUBCLASS: N/A (3) ] [Zap/4-1]
     -- Zap/4-1 is ringing
<< [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [Zap/4-1]
<< [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [Zap/4-1]
<< [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [Zap/4-1]
<< [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [Zap/4-1]
<< [ TYPE: Null Frame (4) SUBCLASS: N/A (4) ] [Zap/4-1]
     -- Zap/4-1 answered SIP/213.161.193.64-08142788
<< [ HANGUP (NULL) ] [Zap/4-1]
     -- Hungup 'Zap/4-1'

I try to configure channel in different mode, without echo cancellation and 
seems same problem.

This configuration is working perfectly with HandyTone from GrandStream.

Our zapatel.conf look like this (but i have also test with light 
configuration) :

signalling=fxo_ls       ; try also ks ...
group=1
relaxdtmf=yes           ; make no difference
context=sip
echocancel=no
faxdetect=no            ; make no difference
channel => 1-4

All call are incoming call (from PSTN or SIP G711 - ASTERISK - TDM40B - MODEM)

Modem said "no carrier" when answering with ATA.
With a fax machine, i think we will get same problem haven't yet test)

Any idea ?

Thanks for help !


-- 
Arnaud Pignard (apignard@frontier.fr)
Frontier Online - Op?rateur Internet