How do I set up a Tandberg C20 without a managed service?

[steveroskilly]

1. We've had a managed service previously and came to the end of the contract. At the same time, we moved the C20 to a new location. Having now installed it again with a new public IP address in the settings, I need to know how this is registered if not part of another management contract. We never made use of bridging, ISDN conversion etc, so feel we don't need that expense.

2. End points calling us can see and hear us, but we can only receive audio. No video on our screen. Sounds like a setting is wrong still.

[Wayne DeNardi]

It's highly likely if you're getting one way audio or video that the appopriate ports on the firewall are not configured correctly (see https://supportforums.cisco.com/docs/DOC-18565 for a quick guide), or you haven't configured the NAT settings correctly on device.

There are plenty of similar requests on getting C20/SX20/EX90 codecs to work as standalone (not integrated in to a full setup with VCSes) in the TelePresence section of these forums.

Wayne
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[steveroskilly]

Hi Wayne,

Many thanks for your reply . We've set up ports on our firewall now as per the info as suggested.

Before we get to test the ports again however, I'm still not confident that the C20 codec settings are correct for the unit to work properly in the first place. The unit address is 10.24.34.150 and the public ip is 46.33.132.242. Could it be that I still have remnants of the earlier setup when we derived our connection from our previous managed service? I notice some strange ip addresses lower in the settings table. I've attached a word doc of screen shots to help you.

I'm happy to make settings changes but not clear why I would be making them. "VC for Dummies" springs to mind.

[Wayne DeNardi · Accepted solution]

To make sure you don't have any "remnants", you might be best off doing a factory reset.

Then start the configuration afresh.

The most basic things you'll need to configure to get H.323 working are:

Configuration > H.323 > Profile 1 > CallSetup Mode = Direct
Configuration > H.323 > Profile 1 > PortAllocation = Static
Configuration > H.323 > NAT > Address = your public IP
Configuration > H.323 > NAT > Mode = ON

You then need to make sure the ports are open on your firewall to allow the call (as described in my earlier post).

Again, if you have a look in the TelePresence section of the forums, this has been discussed on a number of other occasions.  Try a search for "SX20 standalone".

Wayne
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[steveroskilly]

Hi Wayne,

I did a reset by pressing the reset button for 15 secs, then when red started up again, 2 pushes with green light each time, then it rebooted. However, all settings were retained. So not sure what happened. Odd?

I made the changes you suggested, see the attachment. I then placed a call to one of the bridges we use and got through happily. So looks like I have lift off at last. Many thanks for your help and advice.

[Wayne DeNardi]

Great to hear that it's working. 

The factory reset should have cleared everything - there are two different procedures for the factory reset depending on what version of the software you're running.

For TC5.0 and earlier:

• Press and hold the on/off byrron for 10 seconds - after 10 seconds the led starts blinking (1 second ON, 0.5 seconds OFF)
• Within the next 2 seconds, press the on/off button twice
• The LED lights up continuously while the factory reset is being performed (~3 seconds)
• System reboots

For TC5.1 (and later)

• Turn the unit off
• Press and hold the power button until the power led goes dark and then lights up again (approximately 10 seconds)
• Release power button and then press it twice within 2 seconds
• The system boots up and displays a confirmation message on the screen if the process was successful

Failing that, you can do it via the command line interface (via telnet or ssh) with:

xcommand systemunit factoryreset confirm: yes

Cheers

Wayne
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