Micro Seven, Inc. ®, models LS15-sia format for testing of alarm panels with SIA format without any need of telephone lines
copyrights Micro Seven, Inc.®, 2010



i Small, 4" x 1.75" x 7.5"
i Security Industry Association’s DC03 SIA FORMAT with FSK modem type
i Handshake and acknowledge (kiss-off) tones
i DTMF or Rotary Pulse Dialing Input
i Any telephone number accepted with dialed telephone number displayed on PC screen
i Dual Frequency-type call progress tones for dial tone and ring-back tone
i Window-type software for programming and displaying dialed telephone numbers and alarm messages
i Column parity and bit parity check
i Alarm-receiver simulator
i Dial-up telephone line simulator function from line 2
i Battery-feed (loop current)
i Car battery adapter and 230 volt power options
i 6 month warranty
i Listen-in and ring Line 2 for voice communication with alarm panels
i Programming amplitude of handshake and kiss-off tones

Application and benefit of alarm receiver

i Demonstration and testing alarm control panels at factories and fields
i No alarm receivers required for testing alarm control panels
i Complete testing of alarm panels before the installation
i Confirm dialing telephone numbers before installation


Traditionally, when alarm panels are tested in the manufacturing or demonstrated in the sales offices, alarm receiver with two public telephone lines are required in addition to a computer. The Micro Seven model LS15 SIA FORMAT eliminates an alarm receiver and two telephone lines by combining both of telephone line simulator and alarm receiver functions for the application. Here, an alarm panel is connected to the line 1 of LS15 SIA FORMAT. The RS232C port of a PC is connected to the rear panel connector of LS15 SIA FORMAT with special cable and connector that are provided with LS15 SIA FORMAT. Micro Seven’s LS15 SIA FORMAT control software provides a tool to display incoming alarm messages. First, the alarm panel goes off-hook at line 1. The loop current is flowing at the line 1.  Then, the alarm panel dials a telephone number, which is output at RS232. After few seconds, the LS15 SIA FORMAT provides ring-back tone for two on/off periods. Then, there is no sound for four seconds. And ring-back tone is generated for two seconds.  Then handshake tone is generated by LS15 SIA Format. When the alarm panel receives the handshake tones, the alarm panel transmits a string of alarm message. When the alarm message with parity bits and column parity, LS15 SIA FORMAT the kiss-off tone to the alarm panel. LS15 SIA FORMAT also transmits the ASCII equivalent of the alarm message at the RS232C interface to the PC.  If the alarm message is the Listen-in type, ring signal is produced at line 2. If a telephone set is attached at line 2 and the receiver is lifted, 2-way audio paths are established between alarm panel and line 2.

Then, the alarm panel either transmits a new alarm message after a short delay or hangs up with the telephone line to terminate the call. If the alarm panel did not receive the kiss-off tone, the alarm panel may repeat transmitting the same alarm message several times. When LS15 SIA FORMAT sees the on-hook-state, it turns off the loop current for a few hundred milliseconds as a disconnect signal. Then, LS15 SIA FORMAT is now ready for a new call from the alarm panel. LS15 SIA FORMAT is compatible with the SIA DC03 specifications. LS15 SIA FORMAT also contains a partial capability of LS15-C1, which is a new generation 2-line telephone line simulator with non-volatile program memory.


Specifications of alarm receiver function:


Line 1: alarm receiver (by factory default), may be changed to telephone line simulator by control software

Line 2: telephone line simulator


Dialing: any number by DTMF or rotary pulse dialing. ASCII equivalent of dialed telephone numbers are output at RS232:

For example, if an alarm panel dials 18005551212, the following data is output at RS232 interface:




DTMF dialing signal power: -13dBm to +5dBm per a frequency with maximum 4dB difference between frequencies.

Pulse dialing: Break period: 45 to 75 ms (60 ms nominal), make period: 30 to 60 ms (40 ms nominal)


Handshake tones:

2225Hz: -20 dBm nominal power, -30 dBm power in the line impairment mode


Kiss-off tones (Acknowledge tone):

2025 (positive) or 2225 (negative),  -20 dBm nominal power, -30 dBm power in the line impairment mode


Alarm message baud rate: 300 baud


Battery-feed voltage (loop voltage): (same as the telephone line simulator function): -20 volts


Off-hook impedance requirement: 400 ohms maximum DC, 600 ohms nominal AC(same as the telephone line simulator function)


Call Progress Tones: (same as the telephone line simulator function)


Line Input Jacks: USOC-RJ11-C, standard modular phone jack (same as the telephone line simulator function)


Programmable disconnect-signal: (same as the telephone line simulator function)


RS232C Interface:

Speed: 1200 baud, with one stop bit, no parity bit

The interface signals: Receive Data, Transmit Data, Data Set Ready, Clear-to-send, and ground. The Data Terminal Ready signal is forced high at LS15 SIA FORMAT meaning that a PC is always ready to receive data from LS15 SIA FORMAT.

Connector: special modular connector on LS15 SIA FORMAT the rear panel

Special cable and special connector-9-pin (F)-D-sub at a PC

Received alarm messages are computed for the checksum, and they are transmitted to PC for each character. PC transmitted back hex D (carriage return) to LS15E to signal reception of data.


International AC/DC Adapter(provided with LS15 SIA FORMAT): 100-240VAC input with four

AC/DC Adapter or Car Battery Adapter input and 12VDC regulated output, 800mA maximum 

Line Status Display: red LED for each line to indicate off-hook status (continuous on) 

Power-On Indicator: green LED display

Dimensions: 19 cm (4") W x 4.5 cm (1.75") H x 10 cm (7.5") L

Weight: 400g (0.8 LBS.)

Environmental: Operating temperature: 0 to 35 degree C, Humidity: 85% RH at 35 degree C

Warranty/Service: 6 months limited warranty. No warranty if any factory seal is broken. Service is performed at the factory, usually within 5 working days.


Reference: Digital Communication Standard-SIA DC-03




The provided software is a Window’s type. Its purpose is to program to control tones and display formats.





Communication port setup


The current communication port is displayed. If displayed communication port does not match with communication port in the computer, “?” is shown in the status display area. Then enter a new communication port number in the edit window of RS232 Commport Number. Exit and reenter the software.


Display area


The communication port status, dialed telephone number and alarm messages are displayed in the edit window.



Selection of hexadecimal display


Alarm messages are shown in hexadecimal notation of a byte; “30” for ASCII “1”, “41” for ASCII “A”, etc. instead of ASCII characters.



Parity bit testing


Disable transmission of negative acknowledge tone after receiving a wrong parity bit. The column parity checking is still valid.



Wrong column parity word


Selects a wrong starting data pattern instead of hexadecimal FF for column parity word.



KB inut


If you move your cursor to this KB input area, all KB entries are transmitted to LS15SIA FORMAT via RS232. It simulates Hyper terminal. It is convenient feature for accessing data memory and EEROM.


Loading Default File


Factory default condition is restored with a file DEF15S. It takes one minute. The ASCII “D” is shown  in the display area when it is done.


Typical PC display of telephone number and alarm messages


#18005551212 (Account block) 06 23 30 30 31 31 31 31 DA, (New Event block with Console Emergency) 44 4E 51 41 30 30 E5 (Listen-in) 42 4C 39 30 F8




Micro Seven, Inc. ®

1095-K N.E. 25th Hillsboro, OR, 97124 U.S.A.

Home Page: www.microseveninc.com

Email: sales@microseveninc.com

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