Siemens Unify x5 and Alcatel lucent OmniPCX SIP Interconnection 2

[BleuBell]

Hello Evryone

I want to interconnect an Alcatel lucent OmniPCX as a main System and a Siemens Unify x5 via SIP
After seting up both parties ,When I make a call from Alcatel lucent OmniPCX to Unify x5 i got no issues at all ,both callers hear eatch other but the other way when i pick the call that 's coming from unify X5 the other party i hear nothing and the Unify x5 station keeps ringing like the other party didn't pick the call at all.
Any Ideas

https://ibb.co/8jHTHWD

https://ibb.co/ZHkgCr4

https://ibb.co/qpTxrXJ

https://ibb.co/qWD14X6

https://ibb.co/nPMbLcN

https://ibb.co/dj7vFxn

https://ibb.co/kS0JC9g

 

[akineo]

what network switches and routers between Alcatel and Unify?

 

[masviss]

Try changing this port to 5060

 

[BleuBell]

We are using D-Link DES 1024D switches without any routers