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 with faxing. If faxing is an essential service to you, consider an online fax service
