Know what? I just switched to Anveo last month from CallCentric as Anveo has support for sending/receiving SMS, but that's 4.4 cents to send/receive in the US and I did not look at the rates before I port my phone number, which costs me non-refundable $30 to do so. Better luck next time, but then Google Voice is not a VoIP provider, right? I have my phone number registered in e164.org (ENUM) and it dials my SIP URI, which connects to my Asterisk server and it dials my VoIP phone. ENUM is nice, considering that if someone's VoIP provider supports ENUM look-up (e164.org) and their VoIP phone supports HD Voice (G722) as mine does (Yealink SIP-T22P through Asterisk), the plain old telephone network can be bypassed.
For those who are wondering on what's so great about HD Voice (or G722, for that matter), find a hardware phone that supports HD Voice (or similar naming) or use Ekiga for Windows/Linux which supports G722 and dial this:
sip:wbdemo@conf.zipdx.com
Press the # key to switch to wideband.
Bear in mind that I doubt the plain old standard telephone supports high definition sound with a frequency response of 50Hz to 7kHz.
Oh, if you have just plain Asterisk, put this in your extensions.conf in /etc/asterisk/. That goes in your internal context:
47223366,1,dial(SIP/wbdemo@conf.zipdx.com)
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