[asterisk-ss7] Okeford SS7 Integration

[astgroups at comcast.net]

Hello, 

We are trying to connect Asterisk to an Okeford SS7 switch and are running into some challenges trying to get the circuit to become unblocked. 
The ss7 links are UP but when the Okeford sends the UB message to Asterisk to unblock the individual voice circuits the UBA response from Asterisk does not jibe with what the Okeford expects. Could this be a configuration issue or incompatability beween the two switches stacks? We tested the Asterisk SS7 link back to back on the Asterisk TDM gear and it clears the links and passes calls no problem. Any insight is appreciated. Thanks- Mark 

System detail are; 
Asterisk SVN-trunk-r168629 
libss7 version: SVN-trunk-r210 
DAHDI Version: 2.0.0 Echo Canceller 

Here is debug info from both switches when sending the Unblock request from the Okeford side; 

Asterisk 


Len = 11 [ e0 de 08 05 02 c0 56 16 01 00 14 ] 

FSN: 94 FIB 1 

BSN: 96 BIB 1 

<[0] MSU*CLI> 

[ e0 de 08 ]> 

switch-2Network Indicator: 0 Priority: 0 User Part: ISUP (5) 

switch-2[ 05 ] 

switch-2OPC 6491 DPC 2 SLS 1 

switch-2[ 02 c0 56 16 ] 

switch-2*CLI> CIC: 1 

switch-2*CLI> [ 01 00 ] 

switch-2*CLI> Message Type: UBL 

[ 14 ] 



Len = 11 [ de e1 08 05 5b 99 00 c0 01 00 16 ] 

FSN: 97 FIB 1 

BSN: 94 BIB 1 

>[0] MSU 

[ de e1 08 ] 

Network Indicator: 0 Priority: 0 User Part: ISUP (5) 

[ 05 ] 

OPC 2 DPC 6491 SLS 12 

[ 5b 99 00 c0 ] 

CIC: 1 

switch-2*CLI> [ 01 00 ] 

Message Type: UBA 

[ 16 ] 

--------------------------------------------------------------- 


Okeford 

20:58:53.941 Rx TCP Packet from etsi_isup_0: 

20:58:53.942 faddr=255, len=23 

20:58:53.942 3e 00 00 03 00 00 f4 01 00 02 00 0b 09 00 08 05 

20:58:53.942 02 c0 56 16 01 00 14 

20:58:53.942 MTP: Receive Encapsulated Message : 

20:58:53.942 Cell : 

20:58:53.942 3e 00 00 03 00 00 f4 01 00 02 00 0b 

20:58:53.942 Aib (length 9) : 

20:58:53.942 08 05 02 c0 56 16 01 00 14 

20:58:53.942 load_share_over_linkset: linkset 1, available channels 1 

20:58:53.942 1 links available, sls [1] channel 1 

20:58:53.943 MTP: Send Encapsulated Message (connection index 1) : 

20:58:53.943 Cell : 

20:58:53.943 10 02 01 02 00 01 00 00 00 00 01 0e 

20:58:53.943 Aib (length 13) : 

20:58:53.943 aa 08 00 01 08 05 02 c0 56 16 01 00 14 

20:58:53.943 Tx TCP Packet to MPAC Server: 

20:58:53.943 01 ff 00 1b 00 10 02 01 02 00 01 00 00 00 00 01 

20:58:53.943 0e 0d 00 aa 08 00 01 08 05 02 c0 56 16 01 00 14 

20:58:53.943 [01] Tsd_Write rtn TSD_SUCCESS 

20:58:54.062 Rx TCP Packet from MPAC Server: 

20:58:54.062 faddr=255, len=26 

20:58:54.062 91 06 06 00 00 01 00 00 00 00 00 00 0c 00 aa 08 

20:58:54.062 00 08 05 5b 99 00 c0 01 00 16 

20:58:54.063 MTP: Receive Encapsulated Message : 

20:58:54.063 Cell : 

20:58:54.063 91 06 06 00 00 01 00 00 00 00 00 00 

20:58:54.063 Aib (length 12) : 

20:58:54.063 aa 08 00 08 05 5b 99 00 c0 01 00 16 

20:58:54.064 Routing Error : unknown dest task for sio 5 




chan_dahdi.cfg 

[trunkgroups] 

[channels] 
context=default 
switchtype=euroisdn 
usecallerid=yes 
callreturn=yes 
echocancel=no 
echocancelwhenbridged=no 

signalling = ss7 
ss7type = itu 

ss7_called_nai=dynamic 
ss7_calling_nai=dynamic 

networkindicator=international 

; E1 port 1 
linkset = 1 

group = 1 
signalling=ss7 
ss7type = itu 

pointcode = 2 
adjpointcode = 6491 
defaultdpc = 6491 

networkindicator = international 

cicbeginswith = 1 
channel => 1-15 
cicbeginswith = 17 
channel => 17-31 
sigchan = 16 

; E1 Port 2 

linkset = 2 
group = 2 
signalling = ss7 
ss7type = itu 
pointcode = 2 
adjpointcode = 6491 
defaultdpc = 6491 
networkindicator = international 
cicbeginswith = 1 
channel = 31-46 
cicbeginswith = 17 
channel = 48-62 
sigchan = 47 


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