Timed out looking for connect acknowledge

Asterisk Asterisk Support
1

Hi:

From days ago randomly the incoming calls from isdn lines (4 isdn lines) hung up after few secons. It can be on differents channels on diferents spans. Not always in the same channel. In debug mode I can see this:

3 Timed out looking for connect acknowledge
3 > Protocol Discriminator: Q.931 (8) len=8
3 > Call Ref: len= 1 (reference 217/0xD9) (Terminator)
3 > Message type: DISCONNECT (69)
3 > [08 02 81 90]
3 > Cause (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0 Location: Private network serving the local user (1)
3 > Ext: 1 Cause: Normal Clearing (16), class = Normal Event (1) ]
3 < Protocol Discriminator: Q.931 (8) len=4
3 < Call Ref: len= 1 (reference 89/0x59) (Originator)
3 < Message type: CONNECT ACKNOWLEDGE (15)
3 > Protocol Discriminator: Q.931 (8) len=11
3 > Call Ref: len= 1 (reference 217/0xD9) (Terminator)
3 > Message type: STATUS (125)
3 > [08 02 80 e2]
3 > Cause (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0 Location: User (0)
3 > Ext: 1 Cause: Wrong message (98), class = Protocol Error (6) ] (aquí hay un error de protocolo)
3 > [14 01 0b]
3 > Call State (len= 3) [ Ext: 0 Coding: CCITT (ITU) standard (0) Call state: Disconnect Request (11)
3 < Protocol Discriminator: Q.931 (8) len=4
3 < Call Ref: len= 1 (reference 89/0x59) (Originator)
3 < Message type: RELEASE (77)
– Channel 0/1, span 3 got hangup, cause 98
== Spawn extension (app-announcement-1, s, 5) exited non-zero on 'Zap/16-1’
3 NEW_HANGUP DEBUG: Calling q931_hangup, ourstate Null, peerstate Release Request
3 > Protocol Discriminator: Q.931 (8) len=8
3 > Call Ref: len= 1 (reference 217/0xD9) (Terminator)
3 > Message type: RELEASE COMPLETE (90)
3 > [08 02 80 90]
3 > Cause (len= 4) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0 Location: User (0)
3 > Ext: 1 Cause: Normal Clearing (16), class = Normal Event (1) ]
3 NEW_HANGUP DEBUG: Calling q931_hangup, ourstate Null, peerstate Null
3 NEW_HANGUP DEBUG: Destroying the call, ourstate Null, peerstate Null
– Hungup ‘Zap/16-1’

Is an operator (telefonica spain) problem? Or a pbx problem? I thought that was a line problem but the problem is on diferents lines.

Cheers