[asterisk-users] Dahdi, b410p and looping from 1 port to another

[Olivier]

Setup is:

/etc/dahdi/system.conf:
span=1,0,0,ccs,ami
bchan=1,2
hardhdlc=3
span=2,1,0,ccs,ami
bchan=4,5
hardhdlc=6

/etc/asterisk/chan_dahdi.conf
[trunkgroups]
[channels]
context=isdntrunk
switchtype=euroisdn
group=1
immediate=no
signalling=bri_cpe
channel=>1-2
group=2
signalling=bri_net
channel=>4-5

/etc/asterisk/extensions.ael:
context isdntrunk {
        _X. => {
                NoOp(Call from ${CALLERID(num)});
                Dial(SIP/7530);
                Hangup();
        };
};

context mylocal {
        _10. => {
                ChanIsAvail(DAHDI/g1);
                NoOp(${AVAILCHAN});
                NoOp(${AVAILSTATUS});
                ChanIsAvail(DAHDI/g2);
                NoOp(${AVAILCHAN});
                NoOp(${AVAILSTATUS});
                Dial(DAHDI/g2/${EXTEN:1});
                Hangup();
        };
        _753[0356] => {
                Dial(SIP/${EXTEN});
                Hangup();
        };
};


When dialing from 7533 to 10123456789 :

    -- Executing [10123456 at mylocal:1] ChanIsAvail("SIP/7533-0a0c7968",
"DAHDI/g1") in new stack
    -- Executing [10123456 at mylocal:2] NoOp("SIP/7533-0a0c7968", "") in new
stack
    -- Executing [10123456 at mylocal:3] NoOp("SIP/7533-0a0c7968", "34") in new
stack
    -- Executing [10123456 at mylocal:4] ChanIsAvail("SIP/7533-0a0c7968",
"DAHDI/g2") in new stack
    -- Hungup 'DAHDI/4-1'
    -- Executing [10123456 at mylocal:5] NoOp("SIP/7533-0a0c7968", "DAHDI/4-1")
in new stack
    -- Executing [10123456 at mylocal:6] NoOp("SIP/7533-0a0c7968", "0") in new
stack
    -- Executing [10123456 at mylocal:7] Dial("SIP/7533-0a0c7968",
"DAHDI/g2/0123456") in new stack
    -- Requested transfer capability: 0x00 - SPEECH
    -- Called g2/0123456
[Dec  1 21:56:16] NOTICE[3948]: chan_dahdi.c:10781 pri_dchannel: PRI got
event: HDLC Abort (6) on Primary D-channel of span 1
[Dec  1 21:56:16] NOTICE[3948]: chan_dahdi.c:10781 pri_dchannel: PRI got
event: HDLC Abort (6) on Primary D-channel of span 1
[Dec  1 21:56:16] NOTICE[3949]: chan_dahdi.c:10781 pri_dchannel: PRI got
event: HDLC Abort (6) on Primary D-channel of span 2
  == Primary D-Channel on span 2 down
[Dec  1 21:56:17] WARNING[3949]: chan_dahdi.c:3156 pri_find_dchan: No
D-channels available!  Using Primary channel 6 as D-channel anyway!
[Dec  1 21:56:17] WARNING[3955]: app_dial.c:1067 wait_for_answer: Unable to
forward voice or dtmf
    -- Hungup 'DAHDI/4-1'

and with pri set debug on span 2, my console if rapidly fulling with tens of
lines like:

-- Got SABME from cpe peer.
Sending Unnumbered Acknowledgement
q921.c:782 q921_reset: q921_state now is Q921_LINK_CONNECTION_RELEASED
q921.c:733 q921_dchannel_up: q921_state now is
Q921_LINK_CONNECTION_ESTABLISHED
-- Got SABME from cpe peer.
Sending Unnumbered Acknowledgement
q921.c:782 q921_reset: q921_state now is Q921_LINK_CONNECTION_RELEASED


 dahdi show status
Description                              Alarms  IRQ    bpviol CRC4   Fra
Codi Options  LBO
B4XXP (PCI) Card 0 Span 1                OK      0      0      0      CCS
AMI  YEL      0 db (CSU)/0-133 feet (DSX-1)
B4XXP (PCI) Card 0 Span 2                OK      0      0      0      CCS
AMI  YEL      0 db (CSU)/0-133 feet (DSX-1)
B4XXP (PCI) Card 0 Span 3                RED     0      0      0      CAS
Unk  YEL      0 db (CSU)/0-133 feet (DSX-1)
B4XXP (PCI) Card 0 Span 4                RED     0      0      0      CAS
Unk  YEL      0 db (CSU)/0-133 feet (DSX-1)

dahdi show version
DAHDI Version: 2.1.0-rc5 Echo Canceller:


# lsmod
Module                  Size  Used by
dahdi_dummy             3236  0
xpp_usb                13676  0
xpp                   131296  1 xpp_usb
wcb4xxp                77828  6
wctdm                  32876  0
wcfxo                   9888  0
wctdm24xxp            108320  0
wcte11xp               20992  0
wct1xxp                11520  0
wcte12xp               58560  0
wct4xxp               291680  0
dahdi                 182792  22
dahdi_dummy,xpp,wcb4xxp,wctdm,wcfxo,wctdm24xxp,wcte11xp,wct1xxp,wcte12xp,wct4xxp
firmware_class          6816  3 wctdm24xxp,wcte12xp,wct4xxp
crc_ccitt               2080  1 dahdi




Observations:
span1 channels (ie NT port) are always busy (cause 34) while span2 channels
(ie IE port) are available,
before hanging up, I can hear a weird noise in my phone handset.

Question:
1. Why in the first place, should spans 1 and 2 get different availability
as both are connected to each other ?
2. Is bri_net the protocol name for TE ports and bri_cpe for
NT-point-to-point ?
3. Is it normal that dahdi_dummy is not used ?
4. Any idea ?

Regards
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