Cisco and Polycom: Remote trouble-shooting

[stressisasstressdoes]

To skip the long story, jump to the last paragraph:

So I've got a Cisco 2821 router connected to the world and doing NAT for us. On our private network we have a Polycom VSX 7000e. My predecessor had things setup so that the Polycom unit could communicate with similar units across our private network (it's a geographically large network). Unsurprisingly, I'd like to allow the units to be accessible by, and able to access, the world.

To achieve this goal, I've mapped TCP port 3230-3231 and UDP ports 3230-3235 from the external IP to the Polycom unit. This seems to work. (By mapping TCP port 3230 to port 23, I was able to telnet to the unit.) I've also configured the Polycom unit to use the fixed port range and made it aware of the outside IP address. Have I missed anything?

I've done a ping from the web interface to one of Polycom's test suites and it works!

So my question is what other tests can I do remotely? (I'm a two hour drive away.) The people on site are pretty clueless and busy with other things anyway. Or should I just assume it is going to work for the big event we have on Friday?

 

[stressisasstressdoes]

I noticed that the Polycom unit wants to use UDP ports 3230-3253 (not 3235). Guess I've got a bit more work to do on the router.

 

[stressisasstressdoes]

In playing with things a bit more, I realized that one can place calls via the web interface. Logging into the Polycom unit via telnet and recording the output while trying to place calls is pretty enlightening.

Now I'm getting: "Your call could not be completed because the call was routed through an intermediate network that does not service the far site. Contact your network administrator for assistance.