How do I set up SIP voice calling in Empathy?

I would like to use Empathy for Internet voice chat, but I do not see an option under the Empathy Accounts menu to create a SIP account.

How do I set up Internet voice calling in Empathy?

In 13.04 (and presumably 12.10), telepathy relies on rakia instead of sofiasip, and you need the Ubuntu account SIP module. In other words :

sudo apt-get install telepathy-rakia account-plugin-sip

According to https://live.gnome.org/Empathy/FAQ#How_can_I_connect_to_my_SIP_account.3F you need to install the telepathy-sofiasip from the Ubuntu Software Center.

Then, you will be able to add SIP accounts to Empathy from the list of protocols in the Empathy Accounts dialog.