currently I use the following,

來源: 於 2012-10-05 09:47:48 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

currently I use the following,

ooma, main office, best quality.

obi110, remote office, good quality sound, free, no 911.

magicjack, home, quality depends lot on computer.

grooveIP on smartphone, ok quality over wifi, below avg quality over 3g.