Hi
When I call from PSTN to a Cisco IP Phone and the IP Phone has an active call, no busy tone is played, instead there is a normal alerting. The busy trigger in CUCM is set to 1.
Here is a debug isdn q931 output of the h323 gateway:
Voice_GW_LABOR_BE(config-dial-peer)#
*Apr 15 14:31:28.531: ISDN BR0/1/0 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, '0123456789'
Plan:ISDN, Type:Unknown
Calling Party Number i = 0x0183, '0123456789'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x81, '9942152'
Plan:ISDN, Type:Unknown
*Apr 15 14:31:28.551: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x81
Channel ID i = 0x89
Exclusive, B1
*Apr 15 14:31:29.551: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x81
Channel ID i = 0x89
Exclusive, B1
*Apr 15 14:31:29.567: ISDN BR0/1/0 Q931: TX -> DISCONNECT pd = 8 callref = 0x81
Cause i = 0x8091 - User busy
*Apr 15 14:31:29.671: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
*Apr 15 14:31:29.675: ISDN BR0/1/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x81
Voice_GW_LABOR_BE(config-dial-peer)#
Voice_GW_LABOR_BE(config-dial-peer)#
Voice_GW_LABOR_BE(config-dial-peer)#
Voice_GW_LABOR_BE(config-dial-peer)#
Voice_GW_LABOR_BE(config-dial-peer)#
*Apr 15 14:31:42.211: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
Cause i = 0x8090 - Normal call clearing
*Apr 15 14:31:42.219: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
Cause i = 0x8090 - Normal call clearing
Interesting is, that the gateway is sending a disconnect to the ISDN Switch.
Here is the relevant config:
network-clock-participate wic 0
!
isdn switch-type basic-net3
isdn voice-call-failure 0
!
voice call convert-discpi-to-prog
no voice call carrier capacity active
voice rtp send-recv
!
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
!
voice class h323 1
h225 timeout tcp establish 3
call preserve
!
voice-card 0
dsp services dspfarm
!
interface FastEthernet0/0
ip address 10.145.220.6 255.255.255.0
duplex auto
speed auto
h323-gateway voip interface
h323-gateway voip bind srcaddr 10.145.220.6
!
interface BRI0/1/0
no ip address
isdn switch-type basic-net3
isdn point-to-point-setup
isdn incoming-voice voice
isdn sending-complete
no isdn outgoing display-ie
no isdn outgoing ie caller-number
isdn static-tei 0
!
voice-port 0/1/0
compand-type a-law
cptone CH
bearer-cap Speech
!
dial-peer voice 1 voip
destination-pattern 994215.
voice-class codec 1
voice-class h323 1
session target ipv4:10.145.220.40
dtmf-relay h245-alphanumeric
fax rate disable
no vad
!
dial-peer voice 20 pots
preference 1
max-conn 1
destination-pattern 0T
progress_ind alert enable 8
progress_ind progress enable 8
incoming called-number .T
supplementary-service pass-through
direct-inward-dial
port 0/1/0
!
Cheers
Peter
