7.5 P-4 Electronic keys 7 PROGRAMMING OF ENTRY PHONEapartments, then the display of the external panel will show the number of suchuniphone for a couple of seconds. In order to start searching for next uniphones,a key with a KEY symbol should be pushed or one must wait a couple of seconds.After that searching will be started automatically.P-3-4 LOC/OFF Blocking the possibility of using an entry phone. In this modeit is not possible to get connection with any apartment, however, entering anynumber from a keyboard of an entry phone will result in unblocking the entrance.This function can be used during the activation of an entry phone and enables theoccupants to enter the staircase with a door equipped with self closing device.P-3-5 L-F Calculator converting uniphone logical number to its physical num-ber. Calculator functions on condition that range shift parameter has been set orthe exchange has been set to hotel numbering mode. In order to calculate the phys-ical number of a uniphone, its logical number should be entered from a keyboardand then it should be confirmed by a key with a symbol of key.P-3-6 F-L Calculator converting the physical number to logical number. Theprinciple of operation is similar to procedure P-3-5. In order to calculate the logicalnumber of a uniphone, its physical number should be entered from a keyboard andthen it should be confirmed by a key with a symbol of key.P-3-7 SYSt Restoring the default parameters of the exchange operation (definedby procedures P-1 and P-2).P-3-8 CodL Restoring the default parameters of the values of the coded lock.Restoring the codes of a combination lock results in restoring the default code ofan installing specialist.P-3-9 OPoL Restoring the default values of individual settings in electronic cas-sette.7.5 P-4 Electronic keysEntry phone CD-3100 can be equipped with electronic key reader. There arethree kinds of keys in entry phone. Service keys enable change of entry phone con-figuration, special keys are used by postmen, administration etc. and keys for theoccupants.Keys should be registered at both the main and subordinate entrance. At the mainentrance keys attributed to apartment cannot be registered.Entry phone users can register their own electronic keys (see page. 45). This pos-sibility can be switched off globally in procedure P-2 by setting parameter [ibAd] tovalue ”0” or individually in procedure P-5.Electronic keys can be used after their earlier registration in entry phone memory.Registration includes the activation of procedure (P-4-1 or P-4-2) and applying thekey to the reader.34