We refer to voipcheap online document to configure miniSIPServer to work with its VoIP servers.
In MSS main window, please click menu "Data - External lines" to add an external line with following key values.
|External line type
|Connect to peer SIP/VoIP server
|External line (account)
|your voipcheap username
|your voipcheap password
|Server address / Domain
Below figure describes these details.