Hey everyone,
I searched the forum, and asked google, but I didn't find a solution yet, so here is my setup:
Cisco 2811 router as H323 Gatway (ISDN BRI) used by a Communications Manager 6.1.
ISDN port configuration:
interface BRI0/2/0
no ip address
no ip mroute-cache
isdn switch-type basic-net3
isdn overlap-receiving T302 4000
isdn point-to-point-setup
isdn incoming-voice voice
isdn send-alerting
isdn sending-complete
isdn outgoing-voice info-transfer-capability 3.1kHz-audio
isdn static-tei 0
Following tests:
Call from the IP phone to my cell. Phone rings, call established. Then I disconnect the call on the IP phone - call is disconnected immidiately:
159518: Oct 22 14:28:05 MESZ: %ISDN-6-DISCONNECT: Interface BRI0/2/0:1 disconnected from unknown , call lasted 7 seconds
159519: Oct 22 14:28:05 MESZ: ISDN BR0/2/0 Q931: TX -> DISCONNECT pd = 8 callref = 0x0B
Cause i = 0x8090 - Normal call clearing
159520: Oct 22 14:28:05 MESZ: ISDN BR0/2/0 Q931: RX <- RELEASE pd = 8 callref = 0x8B
159521: Oct 22 14:28:05 MESZ: ISDN BR0/2/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x0B
Now I make exactly the same but this time I disconnect the call on my cell phone. Now I hear the buzzing sound on the IP phone for exactly 30 seconds. Debug on the router looks like this:
159389: Oct 22 13:55:07 MESZ: %ISDN-6-CONNECT: Interface BRI0/2/0:1 is now connected to N/A N/A
159390: Oct 22 13:55:08 MESZ: ISDN BR0/2/0 Q931: RX <- DISCONNECT pd = 8 callref = 0x85
Cause i = 0x8090 - Normal call clearing
Progress Ind i = 0x8288 - In-band info or appropriate now available
159391: Oct 22 13:55:08 MESZ: %ISDN-6-DISCONNECT: Interface BRI0/2/0:1 disconnected from unknown , call lasted 6 seconds
159392: Oct 22 13:55:38 MESZ: ISDN BR0/2/0 Q931: RX <- RELEASE pd = 8 callref = 0x85
Cause i = 0x8090 - Normal call clearing
159393: Oct 22 13:55:38 MESZ: ISDN BR0/2/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x05
Takes 30 seconds from disconnect to release.
Why is this? Which timer is responsible? How can I fix this, so that the call gets instant disconnected (released)?
Thanks in advance!
Kind regards, Dave
