We have a Cisco 2811 ISR running CME 7.0. We do not use it as a router, only for voice.
Is there any *safe* way to allow remote teleworkers over the WAN? e.g. SIP clients securely authenticating to CME.
I know a possible solution is using VPN, but that creates a lot of overhead and is especially problematic on mobile platforms, so I'm wondering if it's possible to open some ports to CME and have clients connect directly (similar to public SIP providers).
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