[Asterisk-Users] Low Layer Compatibility (LLC) not forwarded?

[Klaus Darilion]

Hi Lars!

I had similar problems when I tried to forward an UMTS video call 
(H.324M). You can read the problems and mabye where to fix it on
http://bugs.digium.com/view.php?id=3891

klaus

Lars Poschitzki wrote:
> Hello *-users,
> 
> this is my first mail and here I have my first big problem for you...
> 
> I use Asterisk with the Bristuff-Patches and a Digium TE405P plus a quadBRI-card (european ISDN).
> Everything I tried (calls with speech via BRI, SIP and POTS) was succesful except the current task. I try to establish a data call (V.110) originating in a BRI terminal going to an E1-ISDN-Router.
> The E1-station checks whether an LLC-information is contained in the SETUP-Message and then accepts the call.
> 
> Now I can see while I debug the channel (Asterisk CLI -> pri debug span #) that the LLC is received by the PBX but not sent to the PRI... Sad
> The result is that the PRI-station rejects the call with Cause: Incompatible destination.
> 
> 
> Here's a trace of the incoming (BRI) line:
> 
> 
> asterisk1*CLI> bri debug span 2
> asterisk1*CLI> Enabled debugging on span 2
> 
> asterisk1*CLI>
> Protocol Discriminator: Q.931 (8)  len=31
> Call Ref: len= 1 (reference 125/0x7D) (Originator)
> Message type: SETUP (5)
> [04 02 88 90]
> Bearer Capability (len= 4) [ Ext: 1  Q.931 Std: 0  Info transfer capability: Unrestricted digital information (8)
>                              Ext: 1  Trans mode/rate: 64kbps, circuit-mode (16)
>                              Ext: 0  User information layer 1: Unknown (24)
> [18 01 83]
> Channel ID (len= 3) [ Ext: 1  IntID: Implicit, Other Spare: 0, Preferred Dchan: 0
>                        ChanSel: Any channel selectedNo channel selected
>                        ]
> [70 0a 80 35 31 32 38 30 30 35 30 32]
> Called Number (len=12) [ Ext: 1  TON: Unknown Number Type (0)  NPI: Unknown Number Plan (0) '512800502' ]
> [7c 06 88 90 21 45 20 bb]
> IE: Low-layer Compatibility (len = 8)
> -- Making new call for cr 125
> -- Processing Q.931 Call Setup
> -- Processing IE 4 (cs0, Bearer Capability)
> -- Processing IE 24 (cs0, Channel Identification)
> -- Processing IE 112 (cs0, Called Party Number)
> -- Processing IE 124 (cs0, Low-layer Compatibility)
> Protocol Discriminator: Q.931 (8)  len=7
> Call Ref: len= 1 (reference 253/0xFD) (Terminator)
> Message type: CALL PROCEEDING (2)
> [18 01 8a]
> Channel ID (len= 3) [ Ext: 1  IntID: Implicit, Other Spare: 0, Exclusive Dchan: 0
>                        ChanSel: B2 channel
>                        ]
> Protocol Discriminator: Q.931 (8)  len=8
> Call Ref: len= 1 (reference 253/0xFD) (Terminator)
> Message type: ALERTING (1)
> 
> 
> 
> 
> 
> 
> The outgoing (PRI) line shows:
> 
> 
> asterisk1*CLI> pri debug span 5
> asterisk1*CLI> Enabled debugging on span 5
> ...
> ...
> ...
> asterisk1*CLI>
>     -- Accepting data call from '' to '512800502' on channel 0/2, span 2
> ...
> ...
> ...
>     -- Making new call for cr 32770
>     -- Requested transfer capability: 0x08 - DIGITAL
> asterisk1*CLI>
> 
> Protocol Discriminator: Q.931 (8)  len=27
> Call Ref: len= 2 (reference 2/0x2) (Originator)
> Message type: SETUP (5)
> [04 02 88 90]
> Bearer Capability (len= 4) [ Ext: 1  Q.931 Std: 0  Info transfer capability: Unrestricted digital information (8)
>                              Ext: 1  Trans mode/rate: 64kbps, circuit-mode (16)
>                              Ext: 0  User information layer 1: Unknown (24)
> [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 ]
> [6c 02 00 c3]
> Calling Number (len= 4) [ Ext: 0  TON: Unknown Number Type (0)  NPI: Unknown Number Plan (0)
>                           Presentation: Number not available (67) '' ]
> [70 06 c1 31 33 2d 32 37]
> Called Number (len= 8) [ Ext: 1  TON: Subscriber Number (4)  NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1) '13-27' ]
> [a1]
> Sending Complete (len= 1)
>   -- Called 13-27
> asterisk1*CLI>
> 
> Protocol Discriminator: Q.931 (8)  len=9
> Call Ref: len= 2 (reference 32770/0x8002) (Terminator)
> Message type: RELEASE COMPLETE (90)
> [08 02 80 d8]
> Cause (len= 4) [ Ext: 1  Coding: CCITT (ITU) standard (0) 0: 0   Location: User (0)
>                  Ext: 1  Cause: Incompatible destination (88), class = Invalid message (5) ]
>  Processing IE 8 (cs0, Cause)
>   -- Channel 0/1, span 5 got hangup
> 
> 
> Do you have any ideas if Asterisk supports LLC at all or what the solution could be?
> 
> Thanks in advance,
> Lars
>