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New Member

Outbound issue with BRI

Hi,

We're having an issue with a new setup. The router is a 2811 and has 4 BRI interfaces. The telco is Swisscom from Switzerland. The four lines are configured as a group on the telco side.

Inbound calls are working, but when trying to call out, the call is dropped.

Doing a debug isdn q931 shows :

000574: Jun 24 11:58:32.521 PCTime: ISDN BR0/2/0 Q931: Applying typeplan for sw-type 0x1 is 0x0 0x0, Calling num 022365xxxx

000575: Jun 24 11:58:32.525 PCTime: ISDN BR0/2/0 Q931: Applying typeplan for sw-type 0x1 is 0x0 0x0, Called num 003247595xxxx

000576: Jun 24 11:58:32.525 PCTime: ISDN BR0/2/0 Q931: TX -> SETUP pd = 8 callref = 0x0D

Bearer Capability i = 0x8090A2

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x89

Exclusive, B1

Calling Party Number i = 0x0081, '022365xxxx'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '003247595xxxx'

Plan:Unknown, Type:Unknown

000577: Jun 24 11:58:32.609 PCTime: ISDN BR0/2/0 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x8D

Cause i = 0x82E404 - Invalid information element contents

When I compare this with an inbound call

000582: Jun 24 11:59:28.925 PCTime: ISDN BR0/3/0 Q931: RX <- SETUP pd = 8 callref = 0x01

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x89

Exclusive, B1

Calling Party Number i = 0x0183, '003247595xxxx'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x81, '71'

Plan:ISDN, Type:Unknown

High Layer Compat i = 0x9181

000583: Jun 24 11:59:28.945 PCTime: ISDN BR0/3/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x81

Channel ID i = 0x89

Exclusive, B1

000584: Jun 24 11:59:29.169 PCTime: ISDN BR0/3/0 Q931: TX -> ALERTING pd = 8 callref = 0x81

000585: Jun 24 11:59:32.093 PCTime: ISDN BR0/3/0 Q931: TX -> CONNECT pd = 8 callref = 0x81

Channel ID i = 0x89

Exclusive, B1

000586: Jun 24 11:59:32.213 PCTime: ISDN BR0/3/0 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x01

000587: Jun 24 11:59:32.217 PCTime: %ISDN-6-CONNECT: Interface BRI0/3/0:1 is now connected to 003247595xxxx N/A

000588: Jun 24 11:59:38.217 PCTime: %ISDN-6-CONNECT: Interface BRI0/3/0:1 is now connected to 003247595xxxx N/A

000589: Jun 24 11:59:48.929 PCTime: ISDN BR0/3/0 Q931: RX <- DISCONNECT pd = 8 callref = 0x01

Cause i = 0x8090 - Normal call clearing

Progress Ind i = 0x8288 - In-band info or appropriate now available

000590: Jun 24 11:59:48.929 PCTime: %ISDN-6-DISCONNECT: Interface BRI0/3/0:1 disconnected from 003247595xxxx , call lasted 16 seconds

000591: Jun 24 11:59:48.949 PCTime: ISDN BR0/3/0 Q931: TX -> RELEASE pd = 8 callref = 0x81

000592: Jun 24 11:59:49.013 PCTime: ISDN BR0/3/0 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x01

The only difference I can see is the bearer cap, for inbound it is 0x8090A3 which means Voice/Speech call (A-law) and for outbound it is 0x8090A2 which means Voice/Speech call (u-law))

How and where can I specify I want to use G711 Alaw for outbound calls?

Thanks,

Jeroen

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

Re: Outbound issue with BRI

Under voice-port, compand-type a-law.

Hope this helps, please rate post if it does!

6 REPLIES
Hall of Fame Super Gold

Re: Outbound issue with BRI

Under voice-port, compand-type a-law.

Hope this helps, please rate post if it does!

New Member

Re: Outbound issue with BRI

Hi,

Thanks for your reply. This solved my problem!

Rgds,

Jeroen

Hall of Fame Super Gold

Re: Outbound issue with BRI

Thanks for the appreciation and good luck!

New Member

Re: Outbound issue with BRI

Paolo,

Could you please tell me the exact function of this command & how it helped resolve this issue?

Regards,

Ashok.

Hall of Fame Super Gold

Re: Outbound issue with BRI

North America uses a PCM companding algorithm called U law tat is the default. Rest of the world uses A law and must be configured accordingly.

New Member

Re: Outbound issue with BRI

Thanks a lot Paolo, have a nice day.

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