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GTCOM2

Installation & Programming Manual

GSM Communicator

PSTN Contact ID to GSM SMS Text Converter

Reporting security panel messages to the SIA-09 CMS (Central Monitoring Station) receiver

This manual includes steps to install, set up and use your system

GTCOM2 User manual v.2024-01-04 2 | EN

DESCRIPTION

A cost-effective solution that provides GSM/GPRS connectivity for

any non-GSM PSTN security alarm panel DSC, Paradox, UTC Interlogix

(CADDX), Innerrange, Texecom, Honeywell, Crow and Pyronix.

GTCOM2 GSM Communicator is special for converting the PSTN

Ademco Contact ID codes to readable SMS notifications and SIA-09 IP

over GPRS network to central monitoring station (CMS).

The GSM communicator converts the Contact ID codes of the alarm

panel’s PSTN communicator into:

•Readable SMS text and CALL

•Mobile App Push Notifications

•SIA-09 CMS Central monitoring station receiver

Also you will get extra features in the same module:

•ARM/DISARM security panel remotely using APP, Call, SMS

•Access Control: Gates, Doors, etc …

•Control Thermostat. Can be connected up to 32 temperature

sensors.

FEATURES

•Connects to the Panel’s Landline Dialer.

•Reporting to:

o8 cellular numbers through SMS

o8 cellular numbers Alarm calls

oAndroid / iOS SERANOVA app push notifications.

oReporting system events to a central monitoring station

receiver using Internet Protocol Event Reporting with event

type Contact ID. IP communication data is sent using the

SIA IP DC-09 standard protocol, which supports Ping

supervision, AES128 Encoding, TCP/IP or UDP/IP via GSM

GPRS. The supported versions of SIA DC-09 standards:

▪ANSI/SIA DC-09-2007

▪ANSI/SIA DC-09-2012

▪ANSI/SIA DC-09-2013.

•Works with Android/iOS SERANOVA app and Web Apps:

•Provides SMS and push notifications about events.

•Allows remote system Arm/Disarm.

•Enables remote control of connected devices (lights, gates,

ventilation systems, heating, sprinklers, etc.).

•Features remote temperature monitoring.

•Multiple methods for remote control and monitoring:

oAndroid / iOS / WEB-based SERANOVA APP allowing

control system from any OS device from anywhere

oSMS-based communication for system control

oControl of the device by call

oFor your convenience, a web app compatible with standard

web browsers for better accessibility.

•Built-in access control features. Access control for gates, doors,

barriers, and more.

•Thermostat and automation support for up to 32 digital sensors,

ideal for various temperature-sensitive environments.

•Remote configuration and control via GPRS connection, USB with

SERA2 software, or the free SERANOVA app

•Firmware update via USB or remotely via GPRS with the SERA2

software.

•Built-in access control features.

•Events log buffer. 3072 events.

•Built-in real-time clock

APPLICATIONS

•GTCOM2 communicator is cost-effective upgrade for existing

security panel:

oFunctions as a gateway with third-party PSTN/non-2G/3G/4G

LTE alarm panels, using 2G/3G/4G LTE and IP networks for

transmitting data to central monitoring stations (CMS) or

users via SMS and app notifications.

oCapable of simulating PSTN line, interpreting DTMF Contact

ID messages, and sending SMS via GSM network. Compatible

with DTMF dialing and Ademco Contact ID (SIA DC-05

standard).

oSupports SMS notifications for up to 8 users about system

events based on alarm panel settings.

•Allows control of the primary alarm panel from GTCOM2, with

status visible in the app.

•Enables GTCOM2control from the alarm panel with statusdisplay

on the keyboard.

•Home automation

•Gate access control

*Alarm panel must support DTMF (tone) dialing and Ademco Contact ID data format according to SIA

SIA DC-05 standard.

GTCOM2 User manual v.2024-01-04 3 | EN

Download SERANOVA APP

by Scanning the QR Code

The meaning of icons in the manual:

Automation part

Security system’s part

Very important

Important

About the manual

GTCOM2 User manual v.2024-01-04 4 | EN 
Contents 
1GENERAL INFORMATION...............................................................................................................................................................5 
1 Specifications..................................................................................................................................................................................................6 
2 Used definitions and terms..............................................................................................................................................................................7 
3 Package content.............................................................................................................................................................................................8 
4 General view of the module.............................................................................................................................................................................9 
5 Meaning of LEDs and contacts........................................................................................................................................................................9 
2QUICK START................................................................................................................................................................................10 
1 Requirements of the Security Control Panel..................................................................................................................................................10 
2 Requirements for SIM card ...........................................................................................................................................................................10 
3 Preparation...................................................................................................................................................................................................11 
4 Fastening......................................................................................................................................................................................................11 
5 Configuration methods..................................................................................................................................................................................12 
6 SERA2 software............................................................................................................................................................................................12 
7 SERA Cloud Service: Remote Connection to the Module via Internet Using the SERA2/SERANOVA...........................................................12 
8 SERANOVA (Android/iOS/Web) app.............................................................................................................................................................14 
3WIRING & INSTALLATION ............................................................................................................................................................16 
1 Communicator wiring methods......................................................................................................................................................................16 
2 Programming the Primary PSTN Alarm Panel...............................................................................................................................................17 
3 Remote ARM/DISARM of Primary Alarm Panel Using GTCOM2 with SERANOVA App................................................................................17 
3.1 GTCOM2 and primary alarm panel synchronization [by Panel’s EVENTS] ...............................................................................................18 
3.2 GTCOM2 and primary alarm panel synchronization [by Panel’s PGM] .....................................................................................................19 
4 How to Test Synchronization between GTCOM2 and the Primary Alarm Panel.............................................................................................20 
5 GTCOM2 Communicator - Converter for Ademco Contact ID codes into SMS text .......................................................................................21 
4SYSTEM ACCESS: CODES, PASSWORDS, AND PERMISSIONS..............................................................................................23 
1 Default Codes/Passwords and Explanations.................................................................................................................................................23 
2 User codes for access control via keypad and SERANOVA app ...................................................................................................................24 
3 Access control. Arming/Disarming methods ..................................................................................................................................................25 
4 Users & Access Control programming details................................................................................................................................................26 
5 Wiring of Wiegand Keypad, RFID Card Reader, and iButton Probe...............................................................................................................28 
6 Programming iButton, RFID, Phone numbers to the memory of the module..................................................................................................28 
5OUTPUTS .......................................................................................................................................................................................30 
1 Schematic and Wiring of Outputs..................................................................................................................................................................30 
2 Output Programming.....................................................................................................................................................................................30 
6INPUTS ...........................................................................................................................................................................................31 
7SENSORS & AUTOMATION ..........................................................................................................................................................32 
1 Humidity sensors AM2302/DHT22/AM2305/AM2306/AM2320/AM2321........................................................................................................32 
2 Analog Inputs 0-10V Setup ...........................................................................................................................................................................33 
3 Temperature sensors Dallas 1-wire DS18b20 installation & recommendations..............................................................................................33 
4 How to change temperature scale from Celsius to Fahrenheit.......................................................................................................................34 
5 Example of Thermostat Control for Heating and Cooling...............................................................................................................................35 
6 How to test the sensors.................................................................................................................................................................................35 
8Programming with SERA2 configuration software.....................................................................................................................37 
1 General system options programming...........................................................................................................................................................38 
2 Real-time clock Time Zone and Synchronization...........................................................................................................................................39 
3 GSM Communicator Programming................................................................................................................................................................40 
3.1 Event Notifications via SMS & DIAL .........................................................................................................................................................40 
3.1 Custom SMS Text....................................................................................................................................................................................41 
3.2 Network/SIM Card/GPRS/LTE programming............................................................................................................................................41 
3.3 Central Monitoring Station details programming. Reporting to the Central Monitoring Station (CMS)........................................................42 
4 Inputs/Zones programming ...........................................................................................................................................................................43 
1 Outputs PGM programming...........................................................................................................................................................................44 
2 Sensors Programming & Automation/Sensors/Analog Inputs Programming..................................................................................................45 
1 Event List (Events)........................................................................................................................................................................................46 
2 Events Log....................................................................................................................................................................................................46 
3 Real-Time Testing & Monitoring of Hardware................................................................................................................................................47 
3.1 RT Testing & Monitoring Security Alarm Panel/ Access............................................................................................................................48 
3.2 Real-time Testing & Monitoring > Event Monitoring..................................................................................................................................48 
4 SERA2 Remote Configuration, Firmware Updates, Monitoring, and Logging.................................................................................................49 
9SMS Commands for remote control and configuration .............................................................................................................51 
1 The table of installers SMS commands .........................................................................................................................................................52 
2 The table of users SMS commands...............................................................................................................................................................56 
System Info of device and Firmware Updates ............................................................................................................................57 
Warranty Terms and Conditions ..................................................................................................................................................58 
 

GTCOM2 User manual v.2024-01-04 5 | EN

1 GENERAL INFORMATION

Figure 1 Structural schematic with usage

•The GTCOM2 module sends GSM-based SMS alerts about security system events to users.

•Converts Contact ID DTMF data from any security panel's PSTN communicator into SMS; transmits to central monitoring stations (CMS) using

the SIA DC-09 IP protocol, ensuring compatibility with SIA DC-09 receivers.

•Displays the security panel status on the SERANOVA mobile app.

•Synchronizes statuses between the GTCOM2 and the primary alarm panel for control and monitoring, which are accessible through both the

app and keyboard.

•In the event of an alarm or other occurrence, it sends sequential SMS messages (SMS1, SMS2... SMSn) and calls (DIAL1, DIAL2... DIALn) to

each of the 8 users.

SERANOVA

GTCOM2 User manual v.2024-01-04 6 | EN

1.1 Specifications

Parameters of built-in GSM module:

Quad-band (850/900/1800/1900 MHz)

Optional 3G ,4G LTE bands

Sending of SMS messages

Receiving of calls and dialing

Data download/upload via GPRS network

IN1, IN2 inputs:

•Burglary alarm zones. Input type

NC/NO/EOL/EOL+TAMPER 2.2K + 2.2K;

•10K pull up resistor;

•Analog input 0-10V;

•Response time;

•Time of repeatable Alarm/Restore;

•Commutation of selected output;

Inputs/outputs I/O1, I/O2:

Programmable output;

•Open Drain 24V/1A ,

•Short Circuit Protection

•Overvoltage Protection (Active Clamp)

•Overcurrent Protection

Programmable Input:

•NC, NO or EOL=5.6kΩ (settable)

Digital 1-Wire interface 1W:

800 iButton users - DS1990A,

up to 32 temperature sensors DS18b20

Aosong 1-Wire bus Humidity Sensor AM2302

DHT22 AM2305 AM2306 AM2320 AM2321;

Protocol to Central monitoring station (CMS):

ARC –Alarm receiving center

SIA IP DC-09 protocol:

•Standards supported:

oDC-09-2007,

oDC-09-2012,

oDC-09-2013,

oDC-09-2021

•Backup channel: Yes

•UDP/TCP: Yes

•AES128 bit encryption: Yes

•Ping Supervision Messages: Yes

•Time Stamp synchronization: Yes

Wiegand interface D0,D1 (DATA0/ DATA1):

•Wiegand Keypad / RFID reader;

•Wiegand Keypad / RFID reader:

•26-bit,34bit Wiegand RFID card format

•4-bit, 6-bit, 8-bit Keypad PIN/CODE format

•The total length of the bus from 10 to 100m.

Module control:

ARM/DISARM of the security system via:

•Free SERANOVA app (Android, IOS, web)

•SMS message 800 users

•short call DIAL 800 users

•Maxim-Dallas iButton key (iButton DS1990A

–64 Bit ID)) 800 users.

•Wiegand keypad code or RFID keycard or

key fob 800 users

Buffer for unsent events:

Nonvolatile flash events log 3072 events

5V power source output:

•Voltage 5V

•Current limit 100mA

Power supply voltage:

•DC 10-16 V / 200mA max

•Max. Allowed ripple voltage 100mV.

Consumption current:

In standby mode less than 50 mA.

In dialing or SMS/GPRS sending mode

less than 200 mA.

Environmental parameters:

Storage temperature range

from -40 to +85 oC / -40 to 185 oF

Operational temperature range

from -30 to +75 oC / from -22 to 167 oF

Max relative humidity:

0-90% RH @ 0… +40°C (0-90% RH @

+32… +104°F) (non-condensing)

Package weight 90g

Module weight: 43g

Overall dimensions of the module:

73x62x26mm

GTCOM2 User manual v.2024-01-04 7 | EN

1.2 Used definitions and terms

Term

Description

Alarm Log

Records of system events

Arming/Disarming

The process to activate or deactivate the system's security.

Authorized user

A person with a mobile number registered in the GTCOM2 module. Multiple users with equal rights can be added.

Backup battery

The secondary power source of the system. In case of a main power failure, the backup battery will take over.

Bell squawk

Siren signals indicating arming (2 short beeps) and disarming (1 long beep). Default is off.

Bypass/Activate Zone

Allows disabling a compromised zone for arming. The zone is ignored if breached while armed and stays bypassed till

disarmed.

Caller ID

Identifying the caller's phone number.

COM

Negative power supply terminal.

Configuration

Setting system parameters such as phone numbers, input names, etc.

CMS

Central monitoring station

DIAL

The system makes a call to the number specified.

Diagnostic Tool

When using Configuration tool software, you may monitor system inputs/ outputs, view changes of peripheral devices,

instantly configure necessary options, for example, enabling/disabling PGM outputs, etc.

Entry Delay

Countdown initiated upon violation of a Delay-type zone. If disarmed before expiry, no alarm triggers.

EOL

(End of line resistor) input type with resistor.

Event

The information that the user receives.

Event Log

Recorded system events. Logs actions, configurations, and info messages.

Exit Delay

Time after arming for users to leave the secured area.

Fault

An issue preventing normal system operations. The system can diagnose and notify of faults via SMS.

iButton key

A unique 64-bit ID code containing chip enclosed in a stainless-steel tab usually implemented in a small plastic holder.

The module supports up to 800 iButton keys each holding a unique identity code (ID), which is used for system arming

and disarming.

Installer

a person provided with INST (installer's) password

Master/User Code

Allows to carry out system arming/ disarming as well as minor system configuration and control

Normally closed (NC)

It is a switch that passes current until actuated.

Normally open (NO)

It is a switch that must be actuated to pass current.

Periodic Test Event

Regular system test event with date, status, signal strength etc.

Pull-up resistor

Is that it weakly "pulls" the voltage of the wire it is connected to towards +V (or whatever voltage represents a logic

"high").

PGM output

A PGM output is a programmable output that toggles to its set up state when a specific event has occurred in the system

or if the user has initiated the PGM output state change manually.

Ping period

Sets period of time defining how often the module sends ping data packet to the server.

Service messages

ARM/DISARM, test, resetting of the system.

SSR

Solid State Relay

SMS forward

System can re-sent all incoming SMS messages to the specified users. It is useful if the GSM operator of the inserted

SIM card sends some useful information (SIM card validation or payment account status and etc.) or it is necessary to

monitor all incoming SMS messages by specified user.

User

It is a person being aware USER password.

Zone

Detection devices such as motion detectors and door contacts are connected to the alarm system’s zone terminals.

Zone state/status

Indicates a zone's condition: violated or restored.

Positive power supply terminal.

GTCOM2 User manual v.2024-01-04 8 | EN

1.3 Package content

Table 1 Standard package content

GTCOM2 module –1 pcs

Shipping Package - 1 pcs

Package content may be vary without a notice. Ask the seller before buying!

Table 2 Additional, under request package content

Cellular Antenna 2.5 dBi L-Type

SMA Connector

4G LTE Antenna 3dBi SMA male

Adhesive Mount 2m Cable

4G LTE Antenna 7dBi SMA male

Magnetic 2m Cable

4G LTE Antena 5dBi SMA male

Magnetic 2m Cable

Waterproof Temperature Sensor

DS18B20 cable 1m

Temperature sensor DS18B20

Digital Temperature/Humidity

Sensor Am2305

Humidity sensor AM2320

iButton DS1990A-F5+ key

iButton probe with LED indicator

Mini USB cable

Wiegand keypad & RFID reader

GTCOM2 User manual v.2024-01-04 9 | EN

1.4 General view of the module

1. LED Indication: See Table 3 for the meaning of LEDs.

2. Mini USB Connector: Used for module configuration and firmware updates.

3. SIM Card Holder: Push-push type for Nano SIM.

4. ANT GSM Antenna Connector.

5. Terminal Block: For power supply and input/output connections.

1.5 Meaning of LEDs and contacts

Table 3 Meaning of LEDs

Name

Indication variations

Meaning

WDG (green) built-in

LED

Watchdog heart beat blinking, remains lit for

50ms, and turns off after 1000ms.

The module is functioning.

Off

The module is out of order or no voltage

REG (yellow) built-in

LED

Lights continuously

Modem has been registered to the network

Flashes, remains lit for 50ms, turns off for

300ms

Modem is being registered to the GSM network.

Blinking fast, remains lit for 50ms turns off

for 50ms

PIN code of SIM card error. PIN code request should be removed

Off

Modem failed to register to the network.

DATA (red) built-in LED

Lights continuously

The memory of the module contains unsent reports to the user or to the

server.

Off

All data has been sent.

LINE (blue)

Lights continuously

The security control panel has picked up a handset Off-hook

OFF

The security control panel has not picked up a handset On-hook

DTMF

Blinking 5-10ms

DTMF tones are receiving from the control panel

Blinking 1s

DATA OK. Data received correctly.

Figure 2 Meaning of LINE and DTMF LEDs

LINE (blue) LED lights continuously, when central panel OFF HOOK DTMF LED is blinking (5-10ms). When DTMF LED lights for 1s, data received

correctly.

GTCOM2 User manual v.2024-01-04 10 | EN

Table 4 Terminal block. Contacts.

Name

Optional functions and Description

DC+

10-16V

Max

0.2A

COM

Common terminal (negative)

TIP

Terminal to connect with security control panel TIP terminal

RING

Terminal to connect with security control panel RING terminal

I/O1-I/O2

Programmable functions

Digital input (zone) NC/NO/EOL/EOL+Tamper [1]

Open drain output 16V/1A

Analog voltage input 0-16V

IN1/D0 …

IN2/D1

Programmable functions

Input/Zone with pull up resistor 10K to the VD+. Used for gate position or security

sensors

Can be configured NC/NO/EOL/EOL+Tamper

Wiegand interface. Inputs D0 and D1 used for Wiegand RFID reader, keypad

Programmable functions

Digital output (Max 3.3V)

Digital input (Max 3.3V)

Dallas 1-Wire bus. For iButton DS1990A and temperature sensors DS18B20

Aosong 1-Wire bus. Humidity Sensor AM2302, DHT22, AM2305, AM2306

Max available voltage

+3,3V

Max available current

10mA

+5V

Power supply for external temperature, humidity sensors

Max available voltage

+5V

Max available current

100mA

RS485 bus A contact

RS485 bus B contact

[1] If the zone used for security system purpose 5.1k pull-up resistor should be connected

2 QUICK START

•Settings can be saved to file and quickly written to other communicators.

•Two access levels for configuring the device for CMS administrator and for installer.

•Remote configuration and firmware updates.

2.1 Requirements of the Security Control Panel

The security control panel should meet the following requirements:

•Support the Ademco Contact ID protocol in accordance with the SIA DC-05 standard.

•Support dialing in DTMF tones.

•Support the transfer of Contact ID data in DTMF tones.

•It is recommended that the control panel supports automatic Contact ID codes.

2.2 Requirements for SIM card

•Any SIM card could be used. The GTCOM2 module is not locked to a specific GSM network. This means users can use a SIM card from any

GSM service provider that offers SMS and calling capabilities.

•For controlling the module via a short call, the SIM card should have a Caller ID option, which is typically available. If your card cannot identify a