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Voice call not working with media proxy

hey everyone I using Openfire 4.2.3 on centos7 everything right but in my network I need voice call but because of VLAN on our switches client cannot see each other
so voice call between users connected but disconnect with “ICE FAILED” error
after googling i found that need use media proxy that means use this server to connect client to each other when client accessible through each other.
but by after enabling media proxy still, haven’t voice call

after some search, I think need jingle node plugin
after successful installation pf plugin cannot find jingle node tab

how can I get voice call and why cannot see jingle node plugin