If you need to change configuration information, you need to know the password for an administrator profile that has change access to Pack Configuration. If you only need browse permission, you need to know the password for an administrator profile that has browse access to Pack Configuration.
You need to know the international dialing code for your country or region. For example, for the U.S. or Canada, the code is 1; for the United Kingdom, the code is 44.
You need to know how many channel licenses you have purchased and intend to use on this system: you need one license for each channel on a trunk (30 on an E1 trunk, 24 on a T1 trunk).