Panasonic NCP500 VPN testing one way audio sip

Panasonic NCP500 VPN testing work in progress

Having issues on one way audio using a pptp VPN to Panasonic NCP500

Using a Mikrotik router with pptp server.

Cannot get audio from the network to the end user from any of the extensions.

Using two adsl lines bonded by sharedband with all ports transparently sent to the router from sharedband.

Same VPN works on freepbx server on network with no issues.

Tried installing DD-WRT router with pptp server calls are succesful and no one way audio issue.

Then on DD-WRT turn of force encryption back to one way audio again.

Next to try on Mikrotik is enforce encryption to see if this is the issue
Have try disabling service ports on the firewall which made no difference, i am thinking more likely the encryption, because the DD-WRT works out of the box so to speak.

Will test some more with encryption settings.

Update

Seems to be a problem with mikotik on sharedband service
there are two cards on the ncp500 one for sip traffic and ip phones
thesecond card handles the rtp traffic

This i believe is where the problem is, testing on asterisk there is only one ip address for all protocols
with the panasonic there is 2
the rtp traffic is unable to work over the mikrotik vpn

testing a site to site vpn still have problem with one way audio from remote phone over external calls.

Have programmed a staic route from Mikrotik back to router B on site to site but not getting accross the lan.

The Voip DSP card is the problem

Though now testing sip accross site to site it seems very unstable, so will have to avoid site to site on this particular connection as think sharedband is not handling the vpn very well