they receive a busy/dead line signal? By default callers will be routed to your voicemail when the vonage servers cannot contact your Cisco ATA-186 box. Alternatively, you can set up an secondary number to use when your connection is down (eg: a POTS number). You set this up using a web interface to your Vonage account. Can I send/receive FAXes with it? Yes. However ... most people report having limited success
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