[asterisk-users] Connecting Asterisk and BT Versatility PBX via NT BRI port

Fri Aug 1 13:26:33 CDT 2014

On Fri, 1 Aug 2014 12:39:18 -0500, Richard Mudgett wrote:
> On Fri, Aug 1, 2014 at 12:03 PM, Roberto Fichera  wrote:
>
>> Hi All,
>>
>> Ive a BT Versatility PBX that I want to connect to my asterisk
>> 11.9.0 box via BRI port in NT
>> mode but actually I wasnt able to get it working. Ive another
>> standalone PBX, its a
>> Panasonic model, which works fine connected to the same port. The
>> BT connected to a UK
>> BT BRI line works quite fine after roughly a minute once connected.
>> The PBX can be
>> seen at
>>
> 
> http://www.telephone-engineer.com/downloads/versatility/versatility-installation.pdf
>> [1]
>>
>> Putting the pri span in debug mode I can see the following log
>> continuously scrolling
>> and the PBX never synchronize with the openvox B400P card:
>>
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 TEI=0 MDL-ERROR (G): T200 expired N200 times sending
>> SABME in state 5(Awaiting establishment)
>> PRI Span: 1 Changing from state 5(Awaiting establishment) to 4(TEI
>> assigned)
>> PRI Span: 1 TEI=0 DL event: Q931_DL_EVENT_DL_RELEASE_IND(3)
>> PRI Span: 1 SAPI/TEI=0/0 Kick starting link
>> PRI Span: 1 TEI=0 Sending SABME
>> PRI Span: 1 Changing from state 4(TEI assigned) to 5(Awaiting
>> establishment)
>> PRI Span: 1 TEI=0 Sending SABME
>>
>> Below you can find the /etc/dahdi/system.conf
>> # Span 1: B4/0/1 "B4XXP (PCI) Card 0 Span 1" (MASTER) AMI/CCS RED
>> span=1,0,0,ccs,ami
>> # termtype: nt
>> bchan=1-2
>> hardhdlc=3
>> echocanceller=mg2,1-2
>>
>> # Span 2: B4/0/2 "B4XXP (PCI) Card 0 Span 2" AMI/CCS RED
>> span=2,0,0,ccs,ami
>> # termtype: nt
>> bchan=4-5
>> hardhdlc=6
>> echocanceller=mg2,4-5
>>
>> # Span 3: B4/0/3 "B4XXP (PCI) Card 0 Span 3" AMI/CCS RED
>> span=3,1,0,ccs,ami
>> # termtype: te
>> bchan=7-8
>> hardhdlc=9
>> echocanceller=mg2,7-8
>>
>> # Span 4: B4/0/4 "B4XXP (PCI) Card 0 Span 4" AMI/CCS RED
>> span=4,2,0,ccs,ami
>> # termtype: te
>> bchan=10-11
>> hardhdlc=12
>> echocanceller=mg2,10-11
>>
>> # Global data
>>
>> loadzone    = uk
>> defaultzone    = uk
>>
>> the /etc/asterisk/dahdi-channels.conf
>> group=0
>> context=from-PBX
>> overlapdial=yes
>> switchtype = euroisdn
>> signalling = bri_net
>> channel => 1-2
>> context=from-PBX
>>
>> ; Span 2: B4/0/2 "B4XXP (PCI) Card 0 Span 2" AMI/CCS RED
>> group=0
>> context=from-PBX
>> overlapdial=yes
>> switchtype = euroisdn
>> signalling = bri_net
>> channel => 4-5
>> context=from-PBX
>>
>> ; Span 3: B4/0/3 "B4XXP (PCI) Card 0 Span 3" AMI/CCS RED
>> group=1
>> context=from-NT1
>> overlapdial=yes
>> callerid=asreceived
>> switchtype = euroisdn
>> signalling = bri_cpe
>> channel => 7-8
>> context=from-NT1
>>
>> ; Span 4: B4/0/4 "B4XXP (PCI) Card 0 Span 4" AMI/CCS RED
>> group=1
>> context=from-NT1
>> overlapdial=yes
>> callerid=asreceived
>> switchtype = euroisdn
>> signalling = bri_cpe
>> channel => 10-11
>> context=from-NT1
>>
>> the /etc/asterisk/chan_dahdi.conf
>>
>> has the default settings and include the dahdi-channels.conf at the
>> end.
>>
>> Does anyone know how can I solve this problem?
>
> You might want to try bri_net_ptmp since bri_net is for 
> point-to-point
> operation
> and you are not getting any response from the BT.  The BT may be
> expecting
>  to operate in point-to-multi-point mode.  Otherwise, you may have a
> cabling
>
> problem.

Actually I've also tried to set it in PTMP mode without success. The BT 
landline
seems configured in PTP BTW. Regarding the cable, it seems to work 
because I've
used it to connect the Panasonic PBX which indeed work.

Cheers,
Roberto Fichera.

>
> Richard
>
>
>
> Links:
> ------
> [1]
> 
> http://www.telephone-engineer.com/downloads/versatility/versatility-installation.pdf
> [2] mailto:kernel at tekno-soft.it