Strange behavior for a Edge 95 MXP Endpoint

[zlxuso2010]

Hi Experts,

I have a Codec on the client side (Germany), it's a Edge 95 MXP with software version F9.3.1 PAL. Each time when I call from my 150 MXP to it, the Video call is disconnected by that Code after 58 seconds. When I dial the call from that Codec to my 150 MXP, it's fine. Has anybody experienced this kind of situation before?

Thanks,

Jerry

[Wayne DeNardi]

These types of issues are usually firewall problems - with either one end or the other not having the right ports open, or not keeping them open while the call is in progress.

[zlxuso2010]

Hi Wayne,

I don't think so --- since I can call this endpoint via SIP protocol, only via H.323 call (inbound) has the strange issue; if make an outgoing call from this endpoint, it's OK. From the log of the endpoint, it shows "Normal Call clearing".

Thanks Wayne!

[Wayne DeNardi · Accepted solution]

The difference between outbound and inbound is usually a firewall - a stateful firewall will allow the return traffic for any outbound connection, but an inbound connection will need specific rules created to allow the traffic inwards.