[asterisk-users] PRI dropping

[Brandon B.]

Is your PRI dropping calls, or are the unused B channels resetting? What is
your resetinterval in the /etc/asterisk/zapata.conf?



On Tue, Mar 24, 2009 at 3:21 PM, Harry Vangberg <harry at vangberg.name> wrote:

> Hello,
>
> I have an ISDN-30 connection and a Digium TE-121 with VPMADT032 echo
> cancellation. Every 30-60 minutes I experience PRI dropping.
>
> @@@ /etc/zaptel.conf:
> loadzone=dk
> defaultzone=dk
>
> span=2,1,0,ccs,hdb3,crc4
> bchan=32-46
> dchan=47
> bchan=48-62
> @@@
>
> @@@ /etc/asterisk/zapata.conf
> [channels]
> switchtype=euroisdn
> usecallerid=yes
>
> group=2
> signalling=pri_cpe
> context=incoming
> channel => 32-46
> channel => 48-62
> @@@
>
> With PRI debug turned out I get this output:
>
> @@@
> q931.c:2755 q931_restart: call 32768 on channel 1 enters state 62 (Restart)
> > Protocol Discriminator: Q.931 (8)  len=13
> > Call Ref: len= 2 (reference 0/0x0) (Originator)
> > Message type: RESTART (70)
> > [18 03 a9 83 81]
> > Channel ID (len= 5) [ Ext: 1  IntID: Implicit  PRI  Spare: 0  Exclusive
>  Dchan: 0
> >                        ChanSel: Reserved
> >                       Ext: 1  Coding: 0  Number Specified  Channel Type:
> 3
> >                       Ext: 1  Channel: 1 ]
> > [79 01 80]
> > Restart Indentifier (len= 3) [ Ext: 1  Spare: 0  Resetting Indicated
> Channel (0) ]
> < Protocol Discriminator: Q.931 (8)  len=13
> < Call Ref: len= 2 (reference 0/0x0) (Terminator)
> < Message type: RESTART ACKNOWLEDGE (78)
> < [18 03 a1 83 81]
> < Channel ID (len= 5) [ Ext: 1  IntID: Implicit  PRI  Spare: 0
> Preferred  Dchan: 0
> <                        ChanSel: Reserved
> <                       Ext: 1  Coding: 0  Number Specified  Channel Type:
> 3
> <                       Ext: 1  Channel: 1 ]
> < [79 01 80]
> < Restart Indentifier (len= 3) [ Ext: 1  Spare: 0  Resetting Indicated
> Channel (0) ]
> -- Processing IE 24 (cs0, Channel Identification)
> -- Processing IE 121 (cs0, Restart Indicator)
> q931.c:3581 q931_receive: call 32768 on channel 1 enters state 0 (Null)
>    -- B-channel 0/1 successfully restarted on span 2
> @@@
>
> For each and every channel (see full output at http://sprunge.us/fUEd )
>
> I have had two technicians from my telco out here and measuring.
> Everything is fine with the connection.
>
> Best regards,
>
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