[AsteriskBrasil] DAHDi MFC/R2 Embratel

[bsd2013@]

Bom dia amigos gostaria de uma ajuda de todos, estou configurando um link R2 da embratel porem o mesmo quando recebi chamadas esta gerando este erro no dahdi e derrubando a ligação , alguma ideia ? 

Obrigado 

New MFC/R2 call detected on chan 1.
Chan 2 - Handling persistent pattern 0x00
New MFC/R2 call detected on chan 2.
MFC/R2 call offered on chan 1. ANI = , DNIS = 1, Category = *Unknown*
MFC/R2 call has been accepted on backward channel 1
    -- Executing [1 em from-trunk:1] Set("DAHDI/1-1", "__FROM_DID=1") in new stack
    -- Executing [1 em from-trunk:2] NoOp("DAHDI/1-1", "Received an unknown call with DID set to 1") in new stack
    -- Executing [1 em from-trunk:3] Goto("DAHDI/1-1", "s,a2") in new stack
    -- Goto (from-trunk,s,2)
    -- Executing [s em from-trunk:2] Answer("DAHDI/1-1", "") in new stack
    -- Executing [s em from-trunk:3] Wait("DAHDI/1-1", "2") in new stack
Chan 2 - Handling persistent pattern 0x08
Chan 2 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 2
MFC/R2 call end on channel 2
Chan 1 - Handling persistent pattern 0x08
Chan 1 - Far end disconnected. Reason: Normal Clearing
MFC/R2 call disconnected on channel 1
  == Spawn extension (from-trunk, s, 3) exited non-zero on 'DAHDI/1-1'
    -- Executing [h em from-trunk:1] Macro("DAHDI/1-1", "hangupcall,") in new stack
    -- Executing [s em macro-hangupcall:1] GotoIf("DAHDI/1-1", "1?theend") in new stack
    -- Goto (macro-hangupcall,s,3)
    -- Executing [s em macro-hangupcall:3] ExecIf("DAHDI/1-1", "0?Set(CDR(recordingfile)=)") in new stack
    -- Executing [s em macro-hangupcall:4] Hangup("DAHDI/1-1", "") in new stack
  == Spawn extension (macro-hangupcall, s, 4) exited non-zero on 'DAHDI/1-1' in macro 'hangupcall'
  == Spawn extension (from-trunk, h, 1) exited non-zero on 'DAHDI/1-1'
MFC/R2 call end on channel 1
    -- Hungup 'DAHDI/1-1'




MFC/R2 call offered on chan 2. ANI = , DNIS = 1, Category = *Unknown*
[2013-03-26 10:43:50] WARNING[5264]: chan_dahdi.c:4127 dahdi_r2_write_log: Chan 1 - MF back cycle timed out!
[2013-03-26 10:43:50] ERROR[5264]: chan_dahdi.c:4130 dahdi_r2_write_log: Chan 1 - Protocol error. Reason = Multi Frequency Cycle Timeout, R2 State = Seize ACK Transmitted, MF state = Accepted Call Transmitted, MF Group = Backward Group B, CAS = 0x00
DNIS = 1, ANI = , MF = 0x31
[2013-03-26 10:43:50] ERROR[5264]: chan_dahdi.c:3915 dahdi_r2_on_protocol_error: MFC/R2 protocol error on chan 1: Multi Frequency Cycle Timeout
Chan 1 - Handling persistent pattern 0x08
[2013-03-26 10:43:51] NOTICE[5264]: chan_dahdi.c:4161 dahdi_r2_on_line_idle: Far end unblocked on chan 1
[2013-03-26 10:43:52] WARNING[5264]: chan_dahdi.c:4127 dahdi_r2_write_log: Chan 2 - MF back cycle timed out!
[2013-03-26 10:43:52] ERROR[5264]: chan_dahdi.c:4130 dahdi_r2_write_log: Chan 2 - Protocol error. Reason = Multi Frequency Cycle Timeout, R2 State = Seize ACK Transmitted, MF state = Accepted Call Transmitted, MF Group = Backward Group B, CAS = 0x00
DNIS = 1, ANI = , MF = 0x31
[2013-03-26 10:43:52] ERROR[5264]: chan_dahdi.c:3915 dahdi_r2_on_protocol_error: MFC/R2 protocol error on chan 2: Multi Frequency Cycle Timeout
Chan 2 - Handling persistent pattern 0x08
[2013-03-26 10:43:52] NOTICE[5264]: chan_dahdi.c:4161 dahdi_r2_on_line_idle: Far end unblocked on chan 2