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

[Lars Poschitzki]

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

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