[asterisk-ss7] libss7 and Motorola MSC

[Florian Smeets]

On 22.01.2009 12:11 Uhr, Krzysztof Drewicz wrote:
> 2009/1/22 Florian Smeets<flo at kasimir.com>:
>> Hi
>>
>> i'm trying to connect a Motorola MSC to asterisk-1.6.1-beta4 + libss7 trunk.
>
> see:
>
> [0] --- SS7 Up ---
>
>
> Len = 14 [ 80 82 0b 85 e8 43 c2 81 01 00 17 01 01 17 ]
> FSN: 2 FIB 1
> BSN: 0 BIB 1
>> [0] MSU
> [ 80 82 0b ]
> 	Network Indicator: 2 Priority: 0 User Part: ISUP (5)
> 	[ 85 ]
> 	OPC 1801 DPC 1000 SLS 8
> 	[ e8 43 c2 81 ]
> 		CIC: 1
> 		[ 01 00 ]
> 		Message Type: GRS
> 		[ 17 ]
>
> So,
> you are sending the GRS, and wait for GRA from your party (the
> Motorola MSC) so, as if there is a link configured and set up on the
> other side, i think that is the most proable reason.
>

Hi Krzysztof,

thank you four your answer. I think that's only the reason why it does 
not stay up with ss7linktest. I had a look at the source and it seems 
the GRS is only sent if you use ss7linktest.

In asterisk i enabled the debug for this linkset and it looks different:

Len = 15 [ 80 81 0c 81 09 07 fa 00 11 50 aa bb cc dd ee ]
FSN: 1 FIB 1
BSN: 0 BIB 1
<[0] MSU
[ 80 81 0c ]
         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
         [ 81 ]
         OPC 1000 DPC 1801 SLS 0
         [ 09 07 fa 00 ]
         H0: 1 H1: 1
         [ 11 ]

Len = 15 [ 81 82 0c 81 e8 43 c2 01 21 50 aa bb cc dd ee ]
FSN: 2 FIB 1
BSN: 1 BIB 1
 >[0] MSU
[ 81 82 0c ]
         Network Indicator: 2 Priority: 0 User Part: STD_TEST (1)
         [ 81 ]
         OPC 1801 DPC 1000 SLS 0
         [ e8 43 c2 01 ]
         H0: 1 H1: 2
         [ 21 ]

Len = 4 [ 81 81 01 03 ]
FSN: 1 FIB 1
BSN: 1 BIB 1
<[0] LSSU SIOS

Link state change: INSERVICE -> IDLE
Link state change: IDLE -> NOTALIGNED
[Jan 22 13:51:06] WARNING[66493]: chan_dahdi.c:9634 ss7_linkset: MTP2 
link down (SLC 0)

The complete debug is available here:
http://85.214.131.9/~flo/ss7debug.txt

Sometimes is see this message: T4 expired!

Any suggestions are highly appreciated.

Cheers,
Florian