Hi All, I have the problem with TDM2414E card (16FXO & 4 FXS with echo cancellation). I have already connected to the asterisk server and loaded wctdm24xxp module. When I connect the phone to FXS port, It gets the dial tone but I cannot dial to any number (I can press the phone button but nothing happens even the busy tone). There is no activity in the asterisk CLI. It just prints asterisk*CLI> set verbose 10 Verbosity was 5 and is now 10 -- Starting simple switch on 'Zap/52-1' -- Hungup 'Zap/52-1' And also the FXO port, It is connected with NEC line. I(Asterisk) can dial to the party(NEC), they can hear all my voice but I cannot hear anythings from them. How can I fix these problem? Are there any specific configuration for TDM2400P card? Thanks for your help. Thawat This is my configuration: Zaptel.conf loadzone = us defaultzone = us #Digium Wildcard TE110P T1/E1 Card span=1,1,0,ccs,hdb3,crc4,yellow bchan=1-15,17-31 dchan=16 #Wildcard TDM2400P Prototype Board fxsks=32-47 fxoks=52-55 Zapata.conf [channels] language=en context=from-pstn switchtype=euroisdn pridialplan=unknown signalling=pri_cpe usecallerid=yes hidecallerid=no callwaiting=no callwaitingcallerid=no threewaycalling=yes transfer=yes echocancel=yes rxgain=0.0 txgain=0.0 group=1 callgroup=1 pickupgroup=1 immediate=no callprogress=no callerid=asreceived ; TE110P T1/E1 Card group=1 signalling=pri_cpe context=from-pstn channel => 1-15,17-31; TDM2400 Card group=2 signalling=fxs_ks context=from-nec callerid=asreceived channel => 32-47 ; TDM2400 Card group=3 relaxdtmf=yes signalling=fxo_ks context=from-fxs callerid=asreceived channel => 52-55 Extension.conf . . . [from-fxs] exten => _[12]X.,1,Dial(${TRUNK_NEC}/${EXTEN},30,r) exten => _[12]X.,2,Hangup . . .