1 main line, 6 substations with 1 intercom adapter and, as an option, plus 1 separate intercom adapter, as well as optional caller ID display (IP).

Analog telephone switchboard:
For both office and home use.
1 main line/6 extensions, 2 voice channels, analog mini-switchboard, which includes an intercom extension with door opening function as a basic function.

After entering the service code from extension 1, the control panel can be programmed with DTMF codes:
- Night/day mode.
- Ring an incoming call.
- Call restriction.
- Flash time programming.
- Assignment of doorphone push buttons to extensions.
- Gate opening time.
- Extensions included in a circular call.
- Hot wire.

Functions available from attachments:
Extension-to-extension call, extension-to-main line call, call transfer, call pick-up, round call, intercom reception, dedicated intercom call, door opening.

The caller ID (IP) card can be purchased as an option, and if used, a phone number display device can be placed on the extensions, which shows the phone numbers and times of incoming calls.

Specifications:
Number of main lines: 1.
Number of extensions: 6 + 2 intercoms.
Connections: Extensions and the main line: RJ11, the intercom and door opener: terminal block.
Doorphone outdoor: PRODUTEL SESÁM 1-4 Push-button.
Dialing mode: TONE.
Programming: on extension 1, with DTMF codes.
Program storage: EEPROM.
Power supply: 220/240V, 50/60Hz.
Consumption: 4 - 6W.
Main line impedance: 600 Ohm.
Auxiliary line impedance: 600 Ohm.
Telephone cable resistance: max 1450 Ohm.
Telephone resistance on the side: max 400 Ohm.
Internal dial tone frequency: 400 Hz +-10%.
Dial tone period: continuous.
Busy tone: 320 msec signal - 320 msec pause.
Indication of entry into service mode: 5 short beeps and slow flashing of the yellow LED.
Program code acceptance sound: 5 short beeps, then a dial tone to continue.
Faulty program code indication: 6 long beeps, followed by a dial tone to continue.
Ringing voltage: 60 V+-10%/ 50 Hz.
Ringing period for extension-extension calls: 800 msec signal / 200 msec pause / 400 msec signal / 2600 msec pause, continuously repeated.
Ringing period for an incoming main line call: first ring 300 msec signal / 3 sec pause, then 1 sec signal / 3 sec pause continuously repeated.
Ringing period for doorphone 1 signal: 800 msec signal / 800 msec pause repeated 10 times.
Ringing period for doorphone 2 signal: 800 msec signal / 200 msec pause, 400 msec signal / 2.6 sec pause repeated 10 times.