H323 & Encryption

We run Video Conferencing using IP (& H323) over an internal 
network. Occasionally we need to conference with another site over 
the internet. The question of H323 security over the internet has 
been raised. One option we need to explore is the encryption of the 
H323 traffic. Other options under review include VPN / private 
circuit. If there are other alternatives, interested in hearing.

Internet "problems" (latency / QoS) do not appear to be an issue.

Is anyone doing H323 encryption or tested and decided not to? 
Interested in thoughts of it and any downsides. Latency (due to the 
encryption / decryption process) is one we are aware of (just not 
the impact). Are there any others?

Thanks in advance
Mike




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