VOIP Problem: YEALINK and CISCO

Hi Guys,

we have two connections, one for internet and a leased line for system (head office) and voip.

i configured in nat:

when users wants to access the system in HO mikrotik uses the out-interface: Leased Line same with VOIP. Same with the internet but it uses different out-interface.
I tried first not to disable the SIP and h323 helper and it works, but in cisco model IP Phone, we experience 1-way audio. But the other day both IP Phone Model won’t work.
Then I tried to disable the helper and got same problem.

maybe the problem is in NAT with SIP and RTP.

Anyone who config like this or can help me. pretty please..


Thank You.