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CCM & Siemens PBX via Qsig

Hi,

I have the following setup:

A Siemens PBX connecting to a CallManager via Qsig (mgcp controlled)

and

the CCM connecting to PSTN via PRI (mgcp controlled)

Calls to and from CCM works fine (inbound from PSTN and outbound to PSTN)

Calls to and from PBX works fine (inbound from PSTN and outbound to PSTN)

Calls from CCM to PBX works fine

Calls from PBX to CCM does not work

Currently the PBX sends me only 4 digits when trying to dial an ext on CCM and CCM extensions are 5 digits.

My D-channel towards the PBX looks like this:

!

interface Serial1/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-qsig

isdn overlap-receiving T302 2000

isdn incoming-voice voice

isdn bind-l3 ccm-manager

isdn sending-complete

no cdp enable

end

!

and debug isdn q931 gives the following:

01260: Mar 25 11:13:42.699 SAST: ISDN Se1/0:15 Q931: RX <- SETUP pd = 8 callref = 0x0001

Sending Complete

Bearer Capability i = 0x9090A3

Standard = CCITT

Transfer Capability = 3.1kHz Audio

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98381

Exclusive, Channel 1

Facility i = 0x91AA068001008201008B0100A10D02017D06042B0C092903020780

Facility i = 0x91AA068001008201008B0102A11302017E02013B300B30090A01050A01040A0103

Facility i = 0x91AA068001008201008B0100A11402017F06042B0C09008009524543455054494F4E

Progress Ind i = 0x8183 - Origination address is non-ISDN

Calling Party Number i = 0x0183, '0008'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x89, '70051'

Plan:Private, Type:Unknown

Locking Shift to Codeset 5

Codeset 5 IE 0x32 i = 0x81

001261: Mar 25 11:13:42.727 SAST: ISDN Se1/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x8001

Channel ID i = 0xA98381

Exclusive, Channel 1

001262: Mar 25 11:13:42.727 SAST: ISDN Se1/0:15 Q931: TX -> FACILITY pd = 8 callref = 0x8001

Facility i = 0x9FAA06800100820100A40602017E800100

001263: Mar 25 11:13:42.727 SAST: ISDN Se1/0:15 Q931: TX -> ALERTING pd = 8 callref = 0x8001

Facility i = 0x9FAA06800100820100A112020101020101800A4D6172636F204465656E

Progress Ind i = 0x8088 - In-band info or appropriate now available

001264: Mar 25 11:13:42.759 SAST: ISDN Se1/0:15 Q931: RX <- STATUS pd = 8 callref = 0x0001

Cause i = 0x81E41C - Invalid information element contents

Call State i = 0x03

001265: Mar 25 11:13:42.771 SAST: ISDN Se1/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x8001

Cause i = 0x80E2 - Message not compatible with call state or not implemented

001266: Mar 25 11:13:43.075 SAST: ISDN Se1/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x0001

001267: Mar 25 11:13:43.099 SAST: ISDN Se1/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8001

11 REPLIES
Bronze

Re: CCM & Siemens PBX via Qsig

hi,

which version of qsig (ecmav1,v2, iso) do you have on the ccm ?

do you have the right network and user side configuration on the pbx and ccm? can you check, why the pbx is sending the berarer cap = 3.1 khz audio ?

regards

mehmet

New Member

Re: CCM & Siemens PBX via Qsig

Hi,

From what I can see it is using qsig verion ISO. Network and user side is setup correctly as the PBX needs to get to the CCM in order to get out to PSTN. I have no idea why the PBX is sending me bearer cap = 3.1 khz audio. Will ask when I meet the PBX tech onsite.

New Member

Re: CCM & Siemens PBX via Qsig

Hi,

So CCM uses Qsig iso v2 by default it seems. Got the PBX guys to change their side and all is working now.

Thnx

Charl

Bronze

Re: CCM & Siemens PBX via Qsig

Charl,

I am seeing the PBX send 5-digits not 4 as you stated...Called Party Number i = 0x89, '70051'

I also noticed the following message in the debug which is causing the disconnect:

Cause i = 0x80E2 - Message not compatible with call state or not implemented

Take a look at this link it can possibly guide you to the cause:

http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008012e95f.shtml

New Member

Re: CCM & Siemens PBX via Qsig

Hi,

I was referring to the Calling party being 4 digits.

Thnx

Charl

Hall of Fame Super Gold

Re: CCM & Siemens PBX via Qsig

I think you have to look at CM traces for this case, as this is MGCP. Perhaps the CCM doesn't like the facilites in the setup, on the other hand being this QSIG, supposedly any kind of facility must be dealt with.

Re: CCM & Siemens PBX via Qsig

How old is this PBX? You may have to use the DTRAN table and adjust the digits from there.

New Member

Re: CCM & Siemens PBX via Qsig

It looks to me like the PBX is sending 5 digits 70051

Progress Ind i = 0x8183 - Origination address is non-ISDN

Calling Party Number i = 0x0183, '0008'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x89, '70051'

Plan:Private, Type:Unknown

if you find this

Cause i = 0x81E41C - Invalid information element contents

you'll probably find your problem....is this like setup as E1 or T1

New Member

Re: CCM & Siemens PBX via Qsig

Charl,

It i do had the similar probelm faced while integration with alcatel PBX.Let me ask you , whether the firmware running is old version on the PBX, if yes you need to set the advance sysstem paramater ( PRI & MGCP)on CCM

for QSIG variant ECMA.By default its is set to ISO which is higher version.

Let me know after the changes....

vishwesh

New Member

Re: CCM & Siemens PBX via Qsig

Hi,

I have no idea what firmware is running on the PBX. The PBX tech changed his end to Qsig ISO version 2 and that seems to have fixed my problem. I did see those settings under the advance system settings - however you can only change it between ECMA and ISO. You can not change the version of ISO.

Thnx

New Member

Re: CCM & Siemens PBX via Qsig

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