Which modems are supported by Asterisk for full-duplex (as a VoIP-PSTN gateway) operations? I've tried Asmax Mustang (based on TI RK 56000 chipset) but it's 4-bit only, also tried Zoltrix on Rockwell 56k chipset, hacked a lil' bit chan_modem_aopen (so it chooses 7200Hz instead of 8000), sound was 'understandable' but only one-way :/ .Does anybody has experience in using full-duplex voice modem with Asterisk? Are there any cheap alternatives? WK
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