digium b410 не ходят звонки

Добрый день. Есть карточка Digium B410P ISDN. Перестали ходить звонки. Подскажите, что не так. В консоли при входящих:

 -- Span 4: Channel 0/1 got hangup, cause 27
    -- DAHDI/i4/0763393745-1 is circuit-busy


cat /etc/dahdi/system.conf
# Autogenerated by /usr/sbin/dahdi_genconf on Tue Sep 17 16:29:48 2013
# If you edit this file and execute /usr/sbin/dahdi_genconf again,
# your manual changes will be LOST.
# Dahdi Configuration File
#
# This file is parsed by the Dahdi Configurator, dahdi_cfg
#
# Span 1: B4/0/1 "B4XXP (PCI) Card 0 Span 1" (MASTER) RED 
span=1,1,0,ccs,ami
# termtype: te
bchan=1-2
hardhdlc=3
echocanceller=mg2,1-2

# Span 2: B4/0/2 "B4XXP (PCI) Card 0 Span 2" RED 
span=2,2,0,ccs,ami
# termtype: te
bchan=4-5
hardhdlc=6
echocanceller=mg2,4-5

# Span 3: B4/0/3 "B4XXP (PCI) Card 0 Span 3" RED 
span=3,3,0,ccs,ami
# termtype: te
bchan=7-8
hardhdlc=9
echocanceller=mg2,7-8

# Span 4: B4/0/4 "B4XXP (PCI) Card 0 Span 4" RED 
span=4,4,0,ccs,ami
# termtype: te
bchan=10-11
hardhdlc=12
echocanceller=mg2,10-11

.................

pri intense debug span 4
Enabled debugging on span 4


  =
    -- Executing [00763393745@ct_richardsbay:15] Macro("SIP/6000-00000001", "queuelog,1383675389,1383675389.2,q-600,SIP/6000,CALLOUTBOUND,-,0763393745") in new stack
    -- Executing [s@macro-queuelog:1] QueueLog("SIP/6000-00000001", "q-600,1383675389.2,SIP/6000,CALLOUTBOUND,-|number|") in new stack
    -- Executing [number@host:16] Dial("SIP/6000-00000001", "DAHDI/g1/0763393745,500,gM(qm_callvar^1383675389.2^QDV-SIP/6000^q-600^SIP/6000^1383675389^number)") in new stack
PRI Span: 4 -- Mak0
    -- Requested transfer capability: 0x00 - SPEECH
PRI Span: 4 
PRI Span: 4 > DL-DATA request
PRI Span: 4 > Protocol Discriminator: Q.931 (8)  len=34
PRI Span: 4 > TEI=-93 Call Ref: len= 1 (reference 2/0x2) (Sent from originator)
PRI Span: 4 > Message Type: SETUP (5)
PRI Span: 4 Changing from state 1(TEI unassigned) to 3(Establish awaiting TEI)
PRI Span: 4 Sending TEI management message 1(TEI Identity Request), TEI=127
PRI Span: 4 
PRI Span: 4 > TEI: -93 State 3(Establish awaiting TEI)
PRI Span: 4 > V(A)=0, V(S)=0, V(R)=0
PRI Span: 4 > K=1, RC=0, l3_initiated=1, reject_except=0, ack_pend=0
PRI Span: 4 > T200_id=0, N200=3, T203_id=0
PRI Span: 4 > [ fc ff 03 0f 4e 26 01 ff ]
PRI Span: 4 > Unnumbered frame:
PRI Span: 4 > SAPI: 63  C/R: 0 EA: 0
PRI Span: 4 >  TEI: 127        EA: 1
PRI Span: 4 >   M3: 0   P/F: 0 M2: 0 11: 3  [ UI (unnumbered information) ]
PRI Span: 4 > 5 bytes of data
PRI Span: 4 > MDL Message: 1(TEI Identity Request)
PRI Span: 4 > Ri: 20006
PRI Span: 4 > Ai: 127 E:1
PRI Span: 4 TEI=-93 Just queued I-frame since in state 3(Establish awaiting TEI)
PRI Span: 4 q931.c:6334 q931_setup: Call 32770 enters state 1 (Call Initiated).  Hold state: Idle
    -- Called DAHDI/g1/0763393745
PRI Span: 4 T303 timed out.  cref:32770
PRI Span: 4 
PRI Span: 4 > DL-DATA request
PRI Span: 4 > Protocol Discriminator: Q.931 (8)  len=34
PRI Span: 4 > TEI=-93 Call Ref: len= 1 (reference 2/0x2) (Sent from originator)
PRI Span: 4 > Message Type: SETUP (5)
PRI Span: 4 TEI=-93 Just queued I-frame since in state 3(Establish awaiting TEI)
PRI Span: 4 T303 timed out.  cref:32770
PRI Span: 4 q931.c:6223 t303_expiry: Call 32770 enters state 0 (Null).  Hold state: Idle
PRI Span: 4 Fake clearing.  cref:32770
PRI Span: 4 q931.c:9606 pri_internal_clear: alive 1, hangupack 1
Span 4: Processing event PRI_EVENT_HANGUP
    -- Span 4: Channel 0/1 got hangup, cause 18
PRI Span: 4 q931.c:7135 q931_hangup: Hangup other cref:32770
PRI Span: 4 q931.c:6892 __q931_hangup: ourstate Null, peerstate Null, hold-state Idle
PRI Span: 4 Destroying call 0x7fcf280071f0, ourstate Null, peerstate Null, hold-state Idle
    -- Hungup 'DAHDI/i4/0763393745-2'
  == Everyone is busy/congested at this time (1:0/0/1)

      PRI Span: 4 Sending TEI management message 1(TEI Identity Request), TEI=127
PRI Span: 4 
PRI Span: 4 > TEI: -93 State 3(Establish awaiting TEI)
PRI Span: 4 > V(A)=0, V(S)=0, V(R)=0
PRI Span: 4 > K=1, RC=0, l3_initiated=1, reject_except=0, ack_pend=0
PRI Span: 4 > T200_id=0, N200=3, T203_id=0
PRI Span: 4 > [ fc ff 03 0f 40 ea 01 ff ]
PRI Span: 4 > Unnumbered frame:
PRI Span: 4 > SAPI: 63  C/R: 0 EA: 0
PRI Span: 4 >  TEI: 127        EA: 1
PRI Span: 4 >   M3: 0   P/F: 0 M2: 0 11: 3  [ UI (unnumbered information) ]
PRI Span: 4 > 5 bytes of data
PRI Span: 4 > MDL Message: 1(TEI Identity Request)
PRI Span: 4 > Ri: 16618
PRI Span: 4 > Ai: 127 E:1
PRI Span: 4 Sending TEI management message 1(TEI Identity Request), TEI=127
PRI Span: 4 
PRI Span: 4 > TEI: -93 State 3(Establish awaiting TEI)
PRI Span: 4 > V(A)=0, V(S)=0, V(R)=0
PRI Span: 4 > K=1, RC=0, l3_initiated=1, reject_except=0, ack_pend=0
PRI Span: 4 > T200_id=0, N200=3, T203_id=0
PRI Span: 4 > [ fc ff 03 0f 48 da 01 ff ]
PRI Span: 4 > Unnumbered frame:
PRI Span: 4 > SAPI: 63  C/R: 0 EA: 0
PRI Span: 4 >  TEI: 127        EA: 1
PRI Span: 4 >   M3: 0   P/F: 0 M2: 0 11: 3  [ UI (unnumbered information) ]
PRI Span: 4 > 5 bytes of data
PRI Span: 4 > MDL Message: 1(TEI Identity Request)
PRI Span: 4 > Ri: 18650
PRI Span: 4 > Ai: 127 E:1
[Nov  5 20:17:00] ERROR[1559]: chan_dahdi.c:14190 dahdi_pri_error: PRI Span: 4 Unable to receive TEI from network in state 3(Establish awaiting TEI)!

....................

pri show spans
PRI span 1/0: In Alarm, Down, Active
PRI span 2/0: In Alarm, Down, Active
PRI span 3/0: In Alarm, Down, Active
PRI span 4/0: Up, Active

.............................

dahdi_cfg -vv
DAHDI Tools Version - 2.6.2

DAHDI Version: 2.6.2
Echo Canceller(s): HWEC
Configuration
======================

SPAN 1: CCS/ AMI Build-out: 0 db (CSU)/0-133 feet (DSX-1)
SPAN 2: CCS/ AMI Build-out: 0 db (CSU)/0-133 feet (DSX-1)
SPAN 3: CCS/ AMI Build-out: 0 db (CSU)/0-133 feet (DSX-1)
SPAN 4: CCS/ AMI Build-out: 0 db (CSU)/0-133 feet (DSX-1)

Channel map:

Channel 01: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 01)
Channel 02: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 02)
Channel 03: Hardware assisted D-channel (Default) (Echo Canceler: none) (Slaves: 03)
Channel 04: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 04)
Channel 05: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 05)
Channel 06: Hardware assisted D-channel (Default) (Echo Canceler: none) (Slaves: 06)
Channel 07: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 07)
Channel 08: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 08)
Channel 09: Hardware assisted D-channel (Default) (Echo Canceler: none) (Slaves: 09)
Channel 10: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 10)
Channel 11: Clear channel (Default) (Echo Canceler: mg2) (Slaves: 11)
Channel 12: Hardware assisted D-channel (Default) (Echo Canceler: none) (Slaves: 12)

12 channels to configure.

......................................... c

at chan_dahdi.conf
[trunk-groups]

[channels]

;Digium Wildcard B410P quad-BRI card

group=1
signalling=bri_cpe_ptmp
switchtype=euroisdn
context=from-pstn
echocancel=yes
usecallerid=yes
hidecallerid=no
channel => 1,2,4,5,7,8,10,11