ST56 C9908878b8838f49b7b53f3405cabaf7

ST56 is the perfect solution for MRL installations and can be installed on the elevator controllers or in the machine room.

The autodialler ST56, complete with DIN rail, is available in the GSM LINE version for connection to the dedicated GSM200-C module, and in the PSTN LINE version for connection over the PSTN line or over GSM line with universal gateways. Both the versions can be expanded with the 2-relay board.


PSTN 5HE-191
GSM 5HE-192
Max Handsfree4


  • Emergency alarm call management and periodical test in compliance with EN81-28
  • Up to 12 programmable telephone numbers 
  • Supports up to 4 add-on handsfree terminals
  • Digital volume adjustment
  • Advanced self-diagnosis system
  • Local and remote programming by analog telephone, SMS, PC, Flashkey
  • Porgrammng, supervision, alarm management, test calls from PC
  • Compatible with VoIPnet with analog output or with ATA adapter
  • Alarm sending modes: voice, SMS, CLI, esse-ti protocol, ADEMCO, P100
  • Multi-function programmable relay
  • Multi-Sharing function (with GSM200): simultaneous notification of the same alarm to different receivers
  • Multi-Link function: connect up to 9 autodiallers with only a single telephone line
  • Multilanguage menu with 8 options
  • Alarms ending with or without entry codes
  • Activation of communication with the cabin without entry codes
Hardware and Software design and development carried out at the Esse-ti Research Center. 100% made in Italy.

Compliant: EN 81-80, EN 81-28, EN 81-70


Power supply features
Power supply required: 16 W
Mains voltage: 230 Vac +5% -10%
Connectable back up battery: 12V 2A/h
Estimated operation time with a new 2A/h battery in idle state: 35 h
Voltages: +3,3 V; +5 V; +13,8 V
Self-restorable fuse on battery polarity
Overvoltage protections
Absorption in idle state: over PSTN line ≤55 mA; with GSM200 ≤85 mA
Absorption in alarm conversation mode: over PSTN line ≤120 mA; with GSM200 ≤200 mA
Data transmission and signalling system
Modem v.23 (PSTN line): 300-1200 bps FSK
Modem GSM (with GSM200): 9600 bps
Pulse or DTMF dialing over external line
Tones generator: 659 Hz, 740 Hz
DTMF generator
External line tone recognition: 425 Hz
HANDSHAKE tone detector: 1400 Hz, 2300 Hz
Tele-programming protocol: proprietary
Elevator control protocol: proprietary
Service center protocol: esse-ti, P100, Ademco Contact ID, CPC upon request and others
TTL protected serial output for connection to elevator CPU
Telephone terminations
Connection to public telephone line
Connection to GSM line: by proprietary GSM200 gateway (plug RJ-45) or GSM500 gateways
Local telephone connection (plug RJ-11 / terminal block)
External/internal line sharing
3 active handsfree terminals connection
Internal line - External telephone line
Internal line - Handsfree
External telephone line - Handsfree
Reset key
Alarm inputs: 3
Filter input
Gong input
Gong input
Outputs: alarm given indicator light and alarm received indicator light
Led indicator for operation status
Led indicator for GSM200 signal strength
2 Door-opener relays outputs (24V 1A)
Safety systems
EEPROM for data storage under power failure
Built-in NiCd battery for clock data storage
Double watchdog system
Firmware upgrade and settings download by Flashkey
Additional data
Dimensions: 180 x 165 x 65 (h) mm
Weight: 900 g



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