3.3 Function Description

From External User's View (Visitor)

Like normal doorbells, intercom buttons are provided with labels. The visitor finds the appropriate button (e.g. Mr. Smith) and presses it. This activates the intercom, which then dials the number pre-programmed for that button, The visitor can then hear the ringing tone from the loudspeaker and the required (Mr. Smith's in this case) telephone is ringing. If the intercom is connected to a telephone system, you can tag the port the intercom is connected to in order to see on the ringing phone that it is the intercom that is calling. When the called party answers the call, the visitor and the called person can speak to each other and, if an electric lock is connected to the intercom, the called person can open the door by entering the correct password on the telephone keypad to activate the door or barrier. When the caller hangs up, the intercom detects the PBX or analogue line tone and hangs up too. The intercom also hangs up when it "hears" the busy tone or if the call takes more time than as pre-programmed to connect. You can pre-program the amount of time that you have to speak into the microphone, but when you reach the programmed time, the unit will send a warning tone 10 seconds before hanging up so that the called party can extend the call if required.

Notes

If the visitor presses another button during the call, the intercom hangs up for a few seconds before dialling the new number.
If a button is pressed that has no number stored within it, the intercom picks up the line, sends a refusal tone (refer to the Signals Overview) and hangs up.
If the visitor presses the same button during the call, the intercom may hang up (can be programmed to stop this feature if required).
The above mentioned rules are only applied if the Automatic Multiple Number Dialling mode is OFF. For this special mode refer to the Automatic Multiple Number Dialling section.

From Internal User's View (Survey of Functions)

Calling to 2N^® Analog Uni

You call the appropriate extension and the intercom makes the call and gives a confirmation tone after two rings (or as pre-programmed). Now you can speak and control the switch, program the intercom (see later), and listen to what is going on outside and speak to the calling party if desired.

Door opening

The intercom contains a switch to which an electric lock can be connected (not included in this pack). This switch can be telephone keypad controlled using a (digital) password in two ways as shown in the default password 00 example below:

or

The switch activation time can be programmed once the switch is enabled this will also automatically terminate the call in the next 30 seconds.

Note

If the Automatic Multiple Number Dialling with Confirmation or the Silent Automatic Multiple Number Dialling with Confirmation mode is selected and the password starts with digits 1 to 5, an asterisk must always be used.
You Must enter every digit in the password within five seconds (or as pre-programmed) to avoid the intercom hanging up.

Switch activation signalling

After the correct password is entered, the switch is activated and you can hear the confirmation signal on your telephone. You can now speak (e.g. say: "The door is open") or listen (to the door-opening sound, etc.) until the switch is deactivated. Upon deactivation, you can hear the storing signal (see the Signals Overview).

Call extension

The intercom beeps 10 seconds before the call end. To extend the call by 30 seconds press on your telephone (DTMF). You can use this function repeatedly. The visitor, however, cannot use this function!

Programming

The access to this mode is password-protected. For details refer to the Programming section. The voice menu helps you considerably with programming the intercom. Having entered the programming mode, you can also alter any parameter and memory settings.

Caution

The above mentioned functions (except for calls to the intercom) require a tone-dialling telephone set.

Signals Overview

Signal	Name	Meaning
	Confirmation	Sent immediately after line seizure for incoming calls (can be heard by the calling party). Signals switch activation (by DTMF) – can be heard by the person "at the other end" who activated the switch.
	Refusal	Signals that a non-programmed button has been pressed. Can be heard from the loudspeaker after line connection (first connection signalling). Signals an incoming call if intercom has not been programmed
	Storing	Signals switch deactivation (if activated by DTMF).
	Hang-up	Sent to notify that the call is terminated (in all cases).
Long continuous tone		Signals that the unit is going through full initialisation or dialling memory or password clearing.
"Attention, your call is being terminated"		Signals that the preset maximum call time will elapse within 10 seconds.
"Wait, please"		Optional message during call establishing.
"Communicator number ... is calling"		Optional message for intercom identification
Voice menu		In the programming mode

Call Termination Options – Summary

The busy or continuous tone *) after the call end.
The ringing tone *) after a predefined count of rings.
The subscriber 'at the other end' pressed .
The preset maximum call duration has elapsed.
30 seconds after the switch use has elapsed.
An intercom button was pressed during the call.

*) The intercom is able to detect a permanent tone, busy tone and ringing tone even if the tone has two frequency components as in the UK, the U.S.A. (the so-called BTT tone) and in Canada. This new function does not require setting of any parameter. One of the tone components must be of 440 Hz.

2N^® Analog Uni Statuses and Available Operations

Operation	Hang-up	Outgoing call	Incoming call	Programming
Button pressing – new call	Y	×	—	—
Call extension – DTMF	—	Y	Y	—
Call termination – DTMF	—	Y	Y	Y
Hang-up upon continuous, busy or ringing tone	—	Y	Y	Y
Switch activation – DTMF password	—	×	×	—
Programming start	—	—	Y	—

Explanatory notes:

Y… Yes, always
× … Yes if this function is programmed