[cisco-voip] Convert Progress to Disconnect ISDN Q931 Message

[Ryan Ratliff]

Interoperability issues aside what should happen when you get that  
Progress message is that audio gets cut through to the gateway so the  
PBX can play the user busy tone in-band.  Because your calling party  
is an H.323 gateway you will need to make sure it is configured to  
cut through audio before connect.  The 'voice rtp send-recv' command  
is required for this to work.  I believe http://www.cisco.com/en/US/ 
tech/tk1077/technologies_tech_note09186a0080094c33.shtml is also a  
good read.

Regarding the service parameter as it notes it will only apply when  
the PRI protocol type is PRI EURO and the Protocol Side is User.   I  
would not be surprised if it did not affect a Qsig PRI.

-Ryan

On Jun 17, 2009, at 1:36 AM, Tim Smith wrote:

Have you checked the interoperability portal yet?
http://www.cisco.com/en/US/solutions/ns340/ns414/ns728/ 
networking_solutions_products_genericcontent0900aecd805b561d.html

You didnt mention anything about versions or even the Siemens platform.

These docs contain a good guideline to what features actually work,  
and if anything needs to be tweaked, or if there are any limitations.

They include the key config for both sides as well.

Cheers,

Tim

On Wed, Jun 17, 2009 at 8:44 AM, Kalle Tetto <tettokalle at hotmail.com>  
wrote:
Hi,

currently I have a problem with my QSIG ECMA CUCM <-> SIEMENS  
connection.

PSTN E1 PRI<->H323<->CUCM<->MGCP QSIG ECMA E1 PRI<->SIEMENS

the siemens is not delievering a disconnect code, instead it delivers  
a progress message with the following q931 debug:

Jun 16 15:38:46.460: ISDN Se0/1/1:15 Q931: RX <- PROGRESS pd = 8  
callref = 0xBC34
        Cause i = 0x8091 - User busy

disc-pi-off is for sure not the problem, because I tried all possible  
configurations. The CUCM service parameter does now state the following:

Convert Progress to Disconnect for User Side PRI EURO:   This  
parameter determines whether to convert a Progress request that  
contains a Call Clearing cause value to a Disconnect message. Valid  
values specify True (convert the Progress request to a Disconnect  
message) or False (do not convert the Progress request). This  
parameter is only applicable to the USER side of a PRI EURO interface  
during the call establishment phase.

But this seems not to work, is this because I have a QISG. Has anyone  
a clue, what else could help? The problem is, that the caller hers  
ringback all the time. Would it be possible to play busy back instead  
of ringback in that case?

Currently I’m also not sure if the Siemens could be reconfigured so  
that it sends a disconnect.

any idea is very much appreciated

Cheers

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