Re: [hylafax-users] Atx command and Eicon Diva Server 4BRI

[Bodo Meissner <bodo@xxxxxxxxx>]

Am 2005.10.20 09:18 schrieb(en) Carlo Farinella:

Mat Allgood wrote:
> >
> > Sounds like it is one of the ISDN cause codes:
> >
> > http://www.telos-systems.com/?/techtalk/cause.htm

> Seems to be this one
>
> Cause No. 81 – Invalid call reference value

Hello Carlo,

I don't think this 81 you found in the table is really what you are  
looking for.

The table on the referenced page seems to have decimal numbers while  
this 81 is hex. (There are no numbers with a..f in the table and the  
highest number is 127. Looks like 7-bit values.)

Some data have special encoding in the ISDN protocol messages:

> [C:1] 6:0107:619 - SIG-X(029) 08 01 01 05 04 03 90 90 A3 18 01 83 1E  
> 02 80 83
> 6C 05 01 80 37 31 32 70 04 81 37 31 30
         ^  ^  7  1  2        ^  7  1  0
        01 80                81
These are the calling and called number as shown below.

>                     Q.931  CR01 SETUP
>                            Bearer Capability 90 90 a3
>                            Channel Id 83
>                            Progress Indicator 80 83
>                            Calling Party Number 01 80 '712'
>                            Called Party Number 81 '710'
[...]
> [C:1] 6:0107:736 - D-R(012) 02 83 02 02 08 01 81 45 08 02 81 BB
                                                             ^  ^
> [C:1] 6:0107:736 - D-X(004) 02 83 01 04
> [C:1] 6:0107:737 - SIG-R(008) 08 01 81 45 08 02 81 BB
                                                   ^  ^
>                     Q.931  CR81 DISC
>                            Cause 81 bb '59'
> [C:1] 6:0107:738 - EVENT: Call failed in State 'Outgoing call
> proceeding'
>                     Q.931  CR81 DISC
>                            Cause 81 bb '59'

I can find 81 and bb in the hex data. and I assume '59' is a  
specifically encoded value because it is written in single quotes like  
the calling and called number above.
bb is 80 + 3b (or 3b with highest bit set). 3b hex is 59 decimal.

Maybe the cause number is 59 which is not in the table but seems to be  
in section "CLASS 1.3 (service or option not available)"


I found some information on
http://www.eicon.com/support/helpweb/dc9xen/TRACEANA.HTM

Your trace looks similar to Eicon's DiTrace Utility and that's supposed  
to write English explanations of the cause codes like this:

> 17:30:58.589 - SIG-R(008) 08 01 81 45 08 02 81 D8
> Q.931 CR8001 DISC
> Cause 81 d8 'Incompatible destination'

I think now it's sure the table of cause codes is decimal:
d8 = 80 + 58 ; 58 hex = 88 decimal
The table says "Cause No. 88 - Incompatible destination"

> 17:30:58.589 - SIG-R(026) 08 01 81 45 08 02 80 91 28 10 2A 41 41 2A  
> 4E 55 4D 42 45 52 20 42 55 53 59 23
> Q.931 CR0001 DISC
> Cause 80 91 'Number Busy'
> Display 2a 41 41 2a ….. 23 "*AA* NUMBER BUSY#"

91 = 80 + 11 ; 11 hex = 17 decimal
Cause No. 17 - Busy, try again later (User busy)

'59' seems to be a value which even Eicon's software doesn't know.
Maybe you should check the docs of your PBX or ask the manufacturer.


There are more hints on this page:
http://www.eicon.com/support/helpweb/dc9xen/ditrqg.htm

> STEP 6. If the cause of a "DISCON" is not obvious, then check the  
> SETUP message

> Make sure that the ISDN numbers are correct, and also that the Bearer  
> Capabilities look right.

In your trace the Setup message contains "Bearer Capability 90 90 a3"  
which means Fax Group 3.

This may be a difference to your ISDN phone. The phone probably sends
80 90 A3 Voice call (A-Law voice encoding)  or
80 90 A2 Voice call (mu-Law voice encoding - applicable to North  
America)


I sometimes had problems with wrong PBX configurations. When fax  
machine A is connected to an extension defined as "phone" and fax  
machine B connected to a "fax" extension, calls from A to B or vice  
versa may get an "incompatible destination" message with a busy tone.


Maybe you can configure the fax extension as "multifunction device" (=  
fax+phone combination) or configure your ISDN card not to mark it's  
calls as ISDN fax service.


Bodo

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