HI,
I'm using an old 1751V with a VIC2B-NT/TE as ISDN gateway for a IP pbx
My problem is:
When a remote caller calls my phone number through ISDN network , the call is answered by pbx extension . If the remote caller hangs up , the whole call chain (ISDN line--bri port---voip trunk---extension) is disconnected properly.
When a pbx extension places a call to a remote party via ISDN (also to the same phone number that was the caller in previous example) and the voice connection is established, if the remote called party hangs up, the line is not disconnected like before , instead the disconnect tone from ISDN telephon exchange is heard while the whole chain is still up (the call ends for timeout 30 seconds later).
Is this a 1751V configuration problem or a ISDN network one ??
This is my actual (poor) config on 1751V :
no voice call carrier capacity active
interface BRI0/0
no ip address
isdn switch-type basic-net3
isdn incoming-voice voice
isdn answer1 <myphonenumber>
voice-port 0/0
compand-type a-law
cptone IT
dial-peer voice 1 voip
destination-pattern <myphonenumber>
session protocol sipv2
session target ipv4:<mypbxIP>
session transport udp
dtmf-relay rtp-nte
codec g711alaw
no vad
!
dial-peer voice 11 pots
destination-pattern 3T
no digit-strip
port 0/0
!
dial-peer voice 10 pots
destination-pattern 0T
no digit-strip
port 0/0
!
dial-peer voice 20 pots
incoming called-number <myphonenumber>
direct-inward-dial
!
Thank you for any hint !!
