Configuring line access 407Programming Operations GuideRules about assigning prime linesRead the following before you assign Prime lines to a telephone.• You must assign an external line to the telephone in Line assignment before you can assign theline as the prime line to the telephone. Refer to “Determining line assignments” on page 409.• You must assign a line pool to the telephone in Line pool access before you can assign a linepool as the prime line to the telephone. Refer to “Assigning line pool access” on page 414.• A target line cannot be a prime line for a telephone because a target line is incoming-only.Note: Do not assign a T1 DID line as the prime line for a telephone. If assigned, the systemtreats it as if there is no prime line. The telephone displays the message Select a line when youlift the receiver.• PRI lines are set to Auto Answer. You cannot change a PRI line to Manual Answer.• VoIP line pools could be used for prime lines, but the lack of dial tone can cause user confusion.Intercom (I/C)keys0 to 8 Assign the number of intercom buttons to a telephone.Intercom buttons provide a telephone with access to internal and externallines, and line pools. Refer to “Assigning intercom (I/C) buttons (keys)” onpage 408.Doorphone: Before you install the doorphone hardware, assign oneintercom key to the DN record you are assigning to the doorphone.*Private OLInumberDefine the originating line identification number (OLI) which appears onthe telephone being called from this telephone over a private network.Note: On systems running DID, this field is automatically populated withthe DN. Refer to “Private OLI notes” on page 408.On PBX systems, this field is only automatically populated if the DNlength and the Received # length are the same.If the DN length or the Received # length are changed so they aredifferent from each other, this field is cleared.*Public OLInumber Define the originating line identification number (OLI) which appears onthe telephone being called from this telephone over the public network.North America: 10-digit (National)European: digits equal to the public received number lengthNote: If line pools are not properly configured, an extension may use aline with a network range that does not include the OLI of the telephone,causing the network to present an incorrect CLID to the called party.*If your system allows outgoing name and number blocking, the telephone must have a valid OLI.Table 77 Telephone line access fields (Continued)Attribute Values Description
