Between these 2 options:
1. Plug an analog phone into an analog port and just use it
2. Kludge together a VoIP/Analog adapter as a 3rd party endpoint (paying for each adapter and also a license for each device), then convert VoIP back to TDM, and when all that A/D/A conversion causes quality issues where do we start looking...
Sorry, 8-port analog and call it done for me. Yes, a call from analog to VoIP phone uses VCM, but I find conference phones more used for external calls. VoIP to external will use VCM, but analog to external will not. Savings all around.