[asterisk-ss7] No ringback tone on incoming calls with chanss7

[vallimamod abdullah]

Hello list,

I am using chanss7-1.3 with asterisk-1.6.0.6 and everything works fine  
except that asterisk does not generate ringtone on ss7 incoming calls.  
I have forced option 'r' in the Dial command in my dialplan: exten =>  
_X.,1,Dial(SIP/proxy1/${EXTEN},,r) and have set progressinband=yes in  
sip.conf.

Here is what I get in the logs for incoming call:

[2010-03-04 20:53:06.594] VERBOSE[4581] logger.c: [2010-03-04  
20:53:06.594]     -- Recv IAM CIC=1    ANI=***** DNI=17777xxxx RNI=  
redirect=no/0 complete=1
[2010-03-04 20:53:06.594] DEBUG[4581] l4isup.c: IAM cic=1,  
owner=0x00000000
[2010-03-04 20:53:06.594] DEBUG[4581] l4isup.c: Setting iam.dni.complete
[2010-03-04 20:53:06.594] VERBOSE[4896] logger.c: [2010-03-04  
20:53:06.594]     -- Executing [17777xxxx at ss7:2] Dial("SS7/ls1/1",  
"SIP/proxy1/17777xxxx,,r") in new stack
[2010-03-04 20:53:06.595] VERBOSE[4896] logger.c: [2010-03-04  
20:53:06.594]   == Using SIP RTP CoS mark 5
[2010-03-04 20:53:06.595] VERBOSE[4896] logger.c: [2010-03-04  
20:53:06.595]     -- Called proxy1/17777xxxx
[2010-03-04 20:53:06.595] DEBUG[4896] l4isup.c: SS7 indicate CIC=1.
[2010-03-04 20:53:06.595] DEBUG[4896] l4isup.c: Sending ALERTING call  
progress for CIC=1 in-band ind=0.
[2010-03-04 20:53:06.595] DEBUG[4896] l4isup.c: Queue packet CIC=1,  
len=17, linkset='ls1', link='l1', slinkset='ls1', slink='l1'
[2010-03-04 20:53:06.595] DEBUG[4581] mtp.c: Queue MSU, lsi=0,  
last_send_ix=0, linkset=ls1, m->link=l1
[2010-03-04 20:53:06.597] DEBUG[4581] mtp.c: Sending buffer to dahdi  
len=21, on link 'l1' bsn=72, fsn=117.
[2010-03-04 20:53:06.838] VERBOSE[4896] logger.c: [2010-03-04  
20:53:06.838]     -- SIP/proxy1-b770d688 is ringing

On the ss7 dump with wireshark, I have for the CPG frame:

Optional backward call indicators: 0x0
	0 = In-band information indicator: no indication
	0 = Call diversion may occur indicator: no indication
	0 = Simple segmentation indicator: no additional information will be  
sent
	0 = MLPP user indicator: no indication

Is there a way to force asterisk to generate the progress tone ?

Thank you !

Regards,
- vma
.