To configure the switching parameters of a voice/fax channel, you must first create a library of voice/fax switching profiles. Each profile includes a set of voice/fax switching characteristics specified by the administrator of your system. Once this library has been created, you may assign a profile to one or more of the voice/fax channels within your unit, as specified by the systems administrator. Assigning a switching profile to a voice/fax channel is discussed later in this section.