[asterisk-users] Unicall + MFC/R2 line dropped immediately after connect

[Peter Gubis]

Hi,

I am trying to set up an E1 line with CAS signaling using available
unicall patches with libmfcr2 implementation. Inbound calls works well,
I am able to get DNIS and ANI from incoming call, but I am still not
able to make an outbound call with our local carrier.

After tweaking of protocolvariant parameter in unicall.conf I was able
to find proper values for inbound and outbound calls, but when outbound
connection is created, it is immediately dropped by opposite side
immediately after connection is made. I think, that we're receiving
billing pulses on the line and they're interpreted as a cleaning request.
I found similar problem in the list before:
http://lists.digium.com/pipermail/asterisk-users/2006-June/156732.html.
Steve suggested to use some kind of timeout to workaround this problem.
I've tried to change many timeouts in libmfcr2 library, without any
success. Can somebody help me to go around this line drop-down problem?

Relevant part of debug log file:

Jun  9 15:19:27 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21      <- 6 off [2/      40/Group I       /DNIS]
Jun  9 15:19:27 WARNING[19398]: chan_unicall.c:2644 handle_uc_event: Unicall/21 event Alerting
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21      <- 0101  [1/     200/Await answer  /DNIS]
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:2644 handle_uc_event: Unicall/21 event Connected
  -- UniCall/21-1 answered UniCall/55-1
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:1411 unicall_answer: Answer Call
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Call control(5)
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Answer call
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 0101  ->      [1/      20/Group B       /Accepted Paid]
    -- Attempting native bridge of UniCall/55-1 and UniCall/21-1
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:1620 unicall_bridge: unicall_bridge called
Jun  9 15:19:41 WARNING[19398]: chan_unicall.c:2644 handle_uc_event: Unicall/55 event Answered
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21      <- 0001  [1/     400/Answered      /DNIS]
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 R2 prot. err. [1/     400/Answered      /DNIS] cause 32773 - Unexpected CAS bit pattern
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 1001  ->      [1/       1/Idle          /Idle]
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:2644 handle_uc_event: Unicall/21 event Protocol failure
 -- Unicall/21 protocol error. Cause 32773
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 Channel gains
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 Channel switching
 -- Hungup 'UniCall/21-1'
  == Spawn extension (from_merlin, 87, 1) exited non-zero on 'UniCall/55-1'
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Channel gains
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Channel switching
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Call control(6)
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 Drop call(cause=Normal Clearing [16])
Jun  9 15:19:42 WARNING[19398]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/55 1101  ->      [1/     400/Answer        /Accepted Paid]
    -- Hungup 'UniCall/55-1'
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21      <- 0101  [1/       1/Idle          /Idle]
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 R2 prot. err. [1/       1/Idle          /Idle] cause 32773 - Unexpected CAS bit pattern
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 1001  ->      [1/       1/Idle          /Idle]
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:2644 handle_uc_event: Unicall/21 event Protocol failure
    -- Unicall/21 protocol error. Cause 32773
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21      <- 1001  [1/       1/Idle          /Idle]
Jun  9 15:19:42 WARNING[19390]: chan_unicall.c:627 unicall_report: MFC/R2 UniCall/21 1001  ->      [1/       1/Idle          /Idle]



Many thanks and best regards,
Peter.