Cisco UC320W Configuration Manual page 33

and which is authenticated by Cbeyond before any calls are processed. This "main
number" is called out in the initial setup documentation from Cbeyond.
SIP Domain Name: Provided in Cbeyond's initial setup documentation, this is
typically something like sipconnect.atl0.cbeyond.net and depends on the customer's
market, like Atlanta, Dallas, or Denver.
Authentication ID: Provided in Cbeyond's initial setup documentation, this is
typically the "main number" of the customer.
Password: Provide in Cbeyond's initial setup documentation, this is the password
required to authenticate the customer's UC320W to Cbeyond's SIP proxy server.
SRV Record Lookup: Should be checked.
SRV Auto Prefix: Should be left unchecked.