[asterisk-users] PRI dropping

[Harry Vangberg]

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,