Controls how the server negotiates glare with the far-end switch. The servers at either end of the DS1 link must have complementary settings in this field. Otherwise, the D-channel cannot function. For example, if the Avaya S8XXX server at one end of the link is administered as network, the other end must be administered as user. Available only when this DS1 link is providing an ISDN-PRI connection in a private network.