delayed audio stream after call transfer to another extension in OXE

[joeray]

Hi,
we have a problem with calls from skype for business via SBC to Alcatel OXE R11 in case of blind transfer.
following scenario:
we make a call from a skype for business extension to an alcatel 4028 via SBC. the 4028 picks up this call and makes a blind transfer to another 4028 in the same OXE. the connection is fine, but there is no audio stream in one direction (skype for Business to Alcatel 4028). after 30 seconds the OXE sends a reinvite and then the audio stream works in both directions. without blind transfer it works fine!
any idea?

[cavagnaro]

Logs
Logs
Logs
Logs


Enviado de meu C6603 usando Tapatalk

[joeray]

see attached motortrace.

call from +xxxxxxxx47513 to 50000, blindtransfer to 50001

[haroun]

Compression have changed from :
v=0

o=OXE 1444225742 1444225742 IN IP4 10.141.2.117

s=abs

c=IN IP4 10.141.2.120

t=0 0

m=audio 32514 RTP/AVP 8 101

a=sendrecv

to
o=OXE 1444225742 1444225742 IN IP4 10.141.2.117
s=abs

o=OXE 1444225742 1444225743 IN IP4 10.141.2.117

s=abs

c=IN IP4 10.141.2.118

t=0 0

m=audio 32632 RTP/AVP 8 101

a=sendonly/

and the skype authorise only the receive path

and again after refer
o=OXE 1444225742 1444225744 IN IP4 10.141.2.117

s=abs

c=IN IP4 10.141.2.119

t=0 0

m=audio 32514 RTP/AVP 8 4 101

a=sendrecv
oxe mediagateway(compressor) are not used but iptouh one i thing

[haroun]

try to use only trunk group comperession in the XTGW Parameter

[joeray]

sorry, this problem was solved by sbc-manufacturer.
many thanks

[haroun]

thanks for info sharing