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New Member

SRST with PBX

Hi,

When I am in SRST mode. I can make outside call but when I try to make inside call between a PBX phone and a IP phone I receive a fast busy. I oin a debug isdn q931

02:48:59: ISDN Se1/1:23 Q931: RX <- SETUP pd = 8 callref = 0x11

Bearer Capability i = 0x8090A2

Standard = CCITT

Transer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xE9808311

Exclusive, Interface 0, Channel 17

Display i = 0xB1, 'SALLE TECHNIQUE'

Calling Party Number i = 0x0980, '3400'

Plan:Private, Type:Unknown

Called Party Number i = 0x89, '4101'

Plan:Private, Type:Unknown

02:49:00: %CALL_CONTROL-6-APP_NOT_FOUND: Application mgcpapp in dial-peer 21 not

found. Handing callid 251 to the alternate app default.

02:49:00: ISDN Se1/1:23 Q931: TX -> CALL_PROC pd = 8 callref = 0x8011

Channel ID i = 0xA98391

Exclusive, Channel 17

02:49:00: ISDN Se1/1:23 Q931: TX -> ALERTING pd = 8 callref = 0x8011

02:49:00: ISDN Se1/1:23 Q931: RX <- RELEASE pd = 8 callref = 0x11

Cause i = 0x81E4 - Invalid information element contents

02:49:00: ISDN Se1/1:23 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8011

02:49:00: ISDN Se1/1:23 Q931: RX <- RELEASE pd = 8 callref = 0x11

Cause i = 0x81E0 - Mandatory information element missing

02:49:00: ISDN Se1/1:23 Q931: L3_Go: L3_GetUser_NLCB returned NULL cid 0x0 cr 0x

8011 ev 0x4D ces 1 -- Message ignored

02:49:00: ISDN Se1/1:23 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x8011

Cause i = 0x80D1 - Invalid call reference value

My router is a 3745. When the callmanager is up I don't have that problem. Did somebody have a idea ?

1 REPLY
New Member

Re: SRST with PBX

It looks like an ISDN switch type mismatch. When the CCM is up you are using MGCP and the MGCP configuration specifies the switch type in the CCM configuration. However, in SRST, you are using H.323 which takes the switch type info from the IOS configuration. Check the ISDN switch type on the CCM gateway configuration and make sure that the ISDN switch type command under the T-1 controller in IOS matches.

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