NISTA DEVICES GmbH 2013 © All Rights Reserved167 User’s OperationsNote:1. The Single Button door phones provides limited functionality. The limitations depend on the Doorphone’s keypad usage.2. Pressing the ‘Ring’ button a second time performs the “Call Cancellation” function.7.1 Access by using the ‘Door Access Code’For the door opening: Dial the known ‘Door Access Code’ on the keypad Door shall be open and accompanied by ‘Confirmation’ tone ( Product signaling tones described inChapter 8.1 )Note:1. The default door access code is ‘4321’. Read Chapter 8.4 in order to configure the ‘Door AccessCode’2. Door phone supports up to 9 digits Door Access Code3. This specific operation is available in Keypad units only Door will be opened during the ‘Door Opening Time’ interval.Note:1. The ‘Door Opening Time’ interval can be configured by using the Door Phone programming codes( See also Chapter 8.4)2. The default Door opening time is 3 seconds7.2 Door opening by using the Bypass Switch buttonThe Door phone supports a bypass switch installation. This allows the door opening with a hardwired switchbutton. A bypass switch button should be connected to the SW and /SW terminals. (See Figure 6-4)The door will be opened, regardless of the Door Phone telephony connection status.7.3 Call to the Day / Night OperatorDoor phone can operate in ‘Day’ and ‘Night’ modes. The Operator destination number can be configured for eachmode separately. The number will be dialed when pressing button.