How do I configure Orator VoIP with a Gafachi account?

Gafachi is a provider of VoIP with good rates for toll-free lines.  The configuration settings for Orator would be as following:

SipServer1=sip.gafachi.com
SipAccountName1=(your authentication ID)
SipPassword1=(your secret/password)
SipRealm1=sip.gafachi.com

You may also need an optional setting to refresh the SIP registration every 60 seconds (entered on the Advanced settings tab):

SipRegInterval=60