Busy Tone H.323

[lobocisco]

Hi IPT Team

If I place a outbound call. I cannot receive the busy tone from ISDN network. The H323 router disconnect the call after 20 seconds. I below attach the debug

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA9839E

Exclusive, Channel 30

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

Calling Party Number i = 0x0081, '937496300'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '667631052'

Plan:Unknown, Type:Unknown

*Nov 28 08:36:53.581: ISDN Se0/0/0:15 Q931: RX <-CALL_PROC pd = 8  callref = 0x8D7E

Channel ID i = 0xA9839E

Exclusive, Channel 30

*Nov 28 08:36:54.997: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8  callref = 0x8D7E

Cause i = 0x8091 -User busy

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

*Nov 28 08:36:55.001: ISDN Se0/0/0:15 Q931: call_disc: PI received in disconnect

; Postpone sending RELEASE for callid 0x8CFF


thanks in advanced for your help