Hi Guys
I have a question for ISDN imcoming call then transfer to another voice gateway
our customer has two voice gateway as srst gateway and with three isdn bind lines , below are imcoming call flow
isdn-----vg2(callcenter phone srstGW)-----cm
isdn-----vg1(office user phone srstGW)-----cm
vg1------------sipv2------------vg2
To callcenter incoming call flow
outside user -----vg2-----cm----callcenter agent
outside user -----vg1-----vg2---cm----callcenter agent
To office incoming call flow
outside user------vg1---cm---office phone user
outside user------vg2----vg1----cm------office phone user
I have below testing
when an outside user dial toll-free number from vg1 to callcenter then the call need to forward to vg2 firstly then transfer to cm directly .
I have enabled the debug isdn q931 on vg1 and output the below inforamtion . after 10 seconds the outside user heard du du du sound and disconnect the call.
Cause i = 0x80B9 - Bearer capability not presently authorized
when i have testing to toll-free number again from vg1 to callcenter after 10 seconds i can heard the welcome voice and can be transfer to phone.
but have a strange problem , the pstn call connected by vg2 but the incoming call from vg1 so anyone can explain this appearance ?
but delete the sip trunk and set a dial-peer to cm directly in vg1 and tested is fine and so fast. what's the cause for this issue ?
