After pressing any key (sending DTMF) i hear "busy" signal

Good day!!!
asterisk 1.8.16.0
2* openvox A1610E (pci-express 16 FXS channels)
when i dialling from any phone connected to FXS after pick up i hear “ready” signal (dial tone)
after pressing any key (sending DTMF) i hear “busy” signal. In /var/log/asterisk/messages "

[2012-09-26 17:25:04.603] DTMF[1653] channel.c: DTMF begin '3' received on DAHDI/4-1 [2012-09-26 17:25:04.603] DTMF[1653] channel.c: DTMF begin ignored '3' on DAHDI/4-1 [2012-09-26 17:25:04.683] DTMF[1653] channel.c: DTMF end '3' received on DAHDI/4-1, duration 38 ms [2012-09-26 17:25:04.683] DTMF[1653] channel.c: DTMF end passthrough '3' on DAHDI/4-1 [2012-09-26 17:25:14.274] DTMF[1654] channel.c: DTMF begin '8' received on DAHDI/4-1 [2012-09-26 17:25:14.274] DTMF[1654] channel.c: DTMF begin ignored '8' on DAHDI/4-1 [2012-09-26 17:25:14.354] DTMF[1654] channel.c: DTMF end '8' received on DAHDI/4-1, duration 38 ms [2012-09-26 17:25:14.354] DTMF[1654] channel.c: DTMF end passthrough '8' on DAHDI/4-1 "
/etc/asterisk/extensions.conf:

    [globals]



    [general]
    autofallthrough=yes


    [default]
    ;exten => s,1,Verbose(1;Unrouted call handler)
    exten => s,1,Answer()
    exten => s,n,Wait(1)
    exten => s,n,Playback(tt-weasels)
    exten => s,n,Hangup()


    [incoming_calls]
    exten => _X.,1.NoOp()
    exten => _X.,n,Dial(SIP/1000)

    [outgoing_calls]
    exten => _X.,1,NoOp()
    exten => _X.,n,Dial(SIP/tookinza_101/${EXTEN})

    [internal]
    ;exten => 1000,1,Verbose(1/Extension 1000)
    ;exten => 1000,1,Dial(SIP/1000,30)
    ;exten => 1000,n,Hangup()

    ;exten => 500,1,Verbose(1;Echo test application)
    ;exten => 500,1,Echo()
    ;exten => 500,n,Hangup()

    [from_internal]
    ;exten => 200,1,Dial(sip/tookinza_101/3178683)
    ;exten => 200,2,Hangup()
    exten =>2101,1,Dial(dahdi/1)
    exten => 2101,n,Hangup()
    exten => 2102,1,Dial(dahdi/2)
    exten => 2102,n,Hangup()
    exten => 2103,1,Dial(dahdi/3)
    exten => 2103,n,Hangup()
    exten => 2104,1,Dial(dahdi/4)
    exten => 2104,n,Hangup()
    exten => 2105,1,Dial(dahdi/5)
    exten => 2105,n,Hangup()
    exten => 2106,1,Dial(dahdi/6)
    exten => 2106,n,Hangup()
    exten => 2107,1,Dial(dahdi/7)
    exten => 2107,n,Hangup()
    exten => 2108,1,Dial(dahdi/8)
    exten => 2108,n,Hangup()
    exten => 2109,1,Dial(dahdi/9)
    exten => 2109,n,Hangup()
    exten => 2110,1,Dial(dahdi/10)
    exten => 2110,n,Hangup()
    exten => 2111,1,Dial(dahdi/11)
    exten => 2111,n,Hangup()
    exten => 2112,1,Dial(dahdi/12)
    exten => 2112,n,Hangup()
    exten => 2113,1,Dial(dahdi/13)
    exten => 2113,n,Hangup()
    exten => 2114,1,Dial(dahdi/14)
    exten => 2114,n,Hangup()
    exten => 2115,1,Dial(dahdi/15)
    exten => 2115,n,Hangup()
    exten => 2116,1,Dial(dahdi/16)
    exten => 2116,n,Hangup()
    exten => 2117,1,Dial(dahdi/17)
    exten => 2117,n,Hangup()
    exten => 2118,1,Dial(dahdi/18)
    exten => 2118,n,Hangup()
    exten => 2119,1,Dial(dahdi/19)
    exten => 2119,n,Hangup()
    exten => 2120,1,Dial(dahdi/20)
    exten => 2120,n,Hangup()
    exten => 2121,1,Dial(dahdi/21)
    exten => 2121,n,Hangup()
    exten => 2122,1,Dial(dahdi/22)
    exten => 2122,n,Hangup()
    exten => 2123,1,Dial(dahdi/23)
    exten => 2123,n,Hangup()

    [phones]
    include => internal
    include => outgoing_calls

    [tookinza_in]
    ;exten => s,1,Verbose(1;Unrouted call handler)
    exten => s,1,Answer()
    exten => s,n,Wait(1)
    exten => s,n,Playback(hello)
    exten => s,n,Wait(15)
    exten => s,n,Playback(orwait)
    exten => s,n,Dial(Dahdi/1)
    exten => s,n,Hangup()
    exten => tookinza_101,1,Goto(tookinza_in,s,1)
    exten => tookinza_102,1,Goto(tookinza_in,s,1)
    exten => tookinza_103,1,Goto(tookinza_in,s,1)
    exten => tookinza_104,1,Goto(tookinza_in,s,1)
    exten => tookinza_105,1,Goto(tookinza_in,s,1)
    exten => sub3528805_101,1,Goto(3528805,s,1)
    include => from_internal

    [3528805]
    exten => sub3528805_101,1,Goto(3528805,s,1)
    ;exten => s,1,Verbose(1;Unrouted call handler)
    exten => s,1,Answer()
    exten => s,n,Wait(1)
    exten => s,n,Playback(redial)
    exten => s,n,Hangup()[/code]
/etc/asterisk/chan_dahdi.conf
[code][channels]
usercallerid=yes
hidecallerid=no
callwaiting=no
treewaycalling=yes
transfer=yes
echocancel=yes
echotraining=yes
immediate=no
busydetect=yes
busycount=3
;channels configuration
;##############################################################################
context=phones
signalling=fxo_ks
channel =>1;
context=phones
signalling=fxo_ks
channel =>2;
context=phones
signalling=fxo_ks
channel =>3;
context=phones
signalling=fxo_ks
channel =>4;
context=phones
signalling=fxo_ks
channel =>5;
context=phones
signalling=fxo_ks
channel =>6;
context=phones
signalling=fxo_ks
channel =>7;
context=phones
signalling=fxo_ks
channel =>8;
context=phones
signalling=fxo_ks
channel =>9;
context=phones
signalling=fxo_ks
channel =>10;
context=phones
signalling=fxo_ks
channel =>11;
context=phones
signalling=fxo_ks
channel =>12;
context=phones
signalling=fxo_ks
channel =>13;
context=phones
signalling=fxo_ks
channel =>14;
context=phones
signalling=fxo_ks
channel =>15;
context=phones
signalling=fxo_ks
channel =>16;
context=phones
signalling=fxo_ks
channel =>17;
context=phones
signalling=fxo_ks
channel =>18;
context=phones
signalling=fxo_ks
channel =>19;
context=phones
signalling=fxo_ks
channel =>20;
context=phones
signalling=fxo_ks
channel =>21;
context=phones
signalling=fxo_ks
channel =>22;
context=phones
signalling=fxo_ks
channel =>23;
context=phones
signalling=fxo_ks
channel =>24;
context=phones
signalling=fxo_ks
channel =>25;
context=phones
signalling=fxo_ks
channel =>26;
context=phones
signalling=fxo_ks
channel =>27;
context=phones
signalling=fxo_ks
channel =>28;
context=phones
signalling=fxo_ks
channel =>29;
context=phones
signalling=fxo_ks
channel =>30;
context=phones
signalling=fxo_ks
channel =>31;
context=phones
signalling=fxo_ks
channel =>32;
include dahdi-channels.conf[/code]
/etc/asterisk/dahdi-channels.conf
[code]signalling=fxo_ks
callerid="Channel 1" <4001>
mailbox=4001
group=5
context=from-internal
channel => 1
callerid=
mailbox=
group=
context=default

;;; line="2 OPVXA24XX/24/1"
signalling=fxo_ks
callerid="Channel 2" <4002>
mailbox=4002
group=5
context=from-internal
channel => 2
callerid=
mailbox=
group=
context=default

;;; line="3 OPVXA24XX/24/2"
signalling=fxo_ks
callerid="Channel 3" <4003>
mailbox=4003
group=5
context=from-internal
channel => 3
callerid=
mailbox=
group=
context=default

;;; line="4 OPVXA24XX/24/3"
signalling=fxo_ks
callerid="Channel 4" <4004>
mailbox=4004
group=5
context=from-internal
channel => 4
callerid=
mailbox=
group=
context=default

;;; line="5 OPVXA24XX/24/4"
signalling=fxo_ks
callerid="Channel 5" <4005>
mailbox=4005
group=5
context=from-internal
channel => 5
callerid=
mailbox=
group=
context=default

;;; line="6 OPVXA24XX/24/5"
signalling=fxo_ks
callerid="Channel 6" <4006>
mailbox=4006
group=5
context=from-internal
channel => 6
callerid=
mailbox=
group=
context=default

;;; line="7 OPVXA24XX/24/6"
signalling=fxo_ks
callerid="Channel 7" <4007>
mailbox=4007
group=5
context=from-internal
channel => 7
callerid=
mailbox=
group=
context=default

;;; line="8 OPVXA24XX/24/7"
signalling=fxo_ks
callerid="Channel 8" <4008>
mailbox=4008
group=5
context=from-internal
channel => 8
callerid=
mailbox=
group=
context=default

;;; line="9 OPVXA24XX/24/8"
signalling=fxo_ks
callerid="Channel 9" <4009>
mailbox=4009
group=5
context=from-internal
channel => 9
callerid=
mailbox=
group=
context=default

;;; line="10 OPVXA24XX/24/9"
signalling=fxo_ks
callerid="Channel 10" <4010>
mailbox=4010
group=5
context=from-internal
channel => 10
callerid=
mailbox=
group=
context=default

;;; line="11 OPVXA24XX/24/10"
signalling=fxo_ks
callerid="Channel 11" <4011>
mailbox=4011
group=5
context=from-internal
channel => 11
callerid=
mailbox=
group=
context=default

;;; line="12 OPVXA24XX/24/11"
signalling=fxo_ks
callerid="Channel 12" <4012>
mailbox=4012
group=5
context=from-internal
channel => 12
callerid=
mailbox=
group=
context=default

;;; line="13 OPVXA24XX/24/12"
signalling=fxo_ks
callerid="Channel 13" <4013>
mailbox=4013
group=5
context=from-internal
channel => 13
callerid=
mailbox=
group=
context=default

;;; line="14 OPVXA24XX/24/13"
signalling=fxo_ks
callerid="Channel 14" <4014>
mailbox=4014
group=5
context=from-internal
channel => 14
callerid=
mailbox=
group=
context=default

;;; line="15 OPVXA24XX/24/14"
signalling=fxo_ks
callerid="Channel 15" <4015>
mailbox=4015
group=5
context=from-internal
channel => 15
callerid=
mailbox=
group=
context=default

;;; line="16 OPVXA24XX/24/15"
signalling=fxo_ks
callerid="Channel 16" <4016>
mailbox=4016
group=5
context=from-internal
channel => 16
callerid=
mailbox=
group=
context=default


; Span 2: OPVXA24XX/24 "OpenVox A1610 Board 25" (MASTER)
;;; line="17 OPVXA24XX/24/0"
signalling=fxo_ks
callerid="Channel 17" <4017>
mailbox=4017
group=5
context=from-internal
channel => 17
callerid=
mailbox=
group=
context=default

;;; line="18 OPVXA24XX/24/1"
signalling=fxo_ks
callerid="Channel 18" <4018>
mailbox=4018
group=5
context=from-internal
channel => 18
callerid=
mailbox=
group=
context=default

;;; line="19 OPVXA24XX/24/2"
signalling=fxo_ks
callerid="Channel 19" <4019>
mailbox=4019
group=5
context=from-internal
channel => 19
callerid=
mailbox=
group=
context=default

;;; line="20 OPVXA24XX/24/3"
signalling=fxo_ks
callerid="Channel 20" <4020>
mailbox=4020
group=5
context=from-internal
channel => 20
callerid=
mailbox=
group=
context=default

;;; line="21 OPVXA24XX/24/4"
signalling=fxo_ks
callerid="Channel 21" <4021>
mailbox=4021
group=5
context=from-internal
channel => 21
callerid=
mailbox=
group=
context=default

;;; line="22 OPVXA24XX/24/5"
signalling=fxo_ks
callerid="Channel 22" <4022>
mailbox=4022
group=5
context=from-internal
channel => 22
callerid=
mailbox=
group=
context=default

;;; line="23 OPVXA24XX/24/6"
signalling=fxo_ks
callerid="Channel 23" <4023>
mailbox=4023
group=5
context=from-internal
channel => 23
callerid=
mailbox=
group=
context=default

;;; line="24 OPVXA24XX/24/7"
signalling=fxo_ks
callerid="Channel 24" <4024>
mailbox=4024
group=5
context=from-internal
channel => 24
callerid=
mailbox=
group=
context=default

;;; line="25 OPVXA24XX/24/8"
signalling=fxo_ks
callerid="Channel 25" <4025>
mailbox=4025
group=5
context=from-internal
channel => 25
callerid=
mailbox=
group=
context=default

;;; line="26 OPVXA24XX/24/9"
signalling=fxo_ks
callerid="Channel 26" <4026>
mailbox=4026
group=5
context=from-internal
channel => 26
callerid=
mailbox=
group=
context=default

;;; line="27 OPVXA24XX/24/10"
signalling=fxo_ks
callerid="Channel 27" <4027>
mailbox=4027
group=5
context=from-internal
channel => 27
callerid=
mailbox=
group=
context=default

;;; line="28 OPVXA24XX/24/11"
signalling=fxo_ks
callerid="Channel 28" <4028>
mailbox=4028
group=5
context=from-internal
channel => 28
callerid=
mailbox=
group=
context=default

;;; line="29 OPVXA24XX/24/12"
signalling=fxo_ks
callerid="Channel 29" <4029>
mailbox=4029
group=5
context=from-internal
channel => 29
callerid=
mailbox=
group=
context=default

;;; line="30 OPVXA24XX/24/13"
signalling=fxo_ks
callerid="Channel 30" <4030>
mailbox=4030
group=5
context=from-internal
channel => 30
callerid=
mailbox=
group=
context=default

;;; line="31 OPVXA24XX/24/14"
signalling=fxo_ks
callerid="Channel 31" <4031>
mailbox=4031
group=5
context=from-internal
channel => 31
callerid=
mailbox=
group=
context=default

;;; line="32 OPVXA24XX/24/15"
signalling=fxo_ks
callerid="Channel 32" <4032>
mailbox=4032
group=5
context=from-internal
channel => 32
callerid=
mailbox=
group=
context=default

Please help and advice. Zero in Asterisk full. gathered all on a manual. IVR, trunks and set up all works.
Outcome remains configured FXS lines.

p.s.: i search in forum but not fount any solutions…
p.p.s: please help me, and sorry for my bad english.

Closed, it is my mistake.