FunkTronic Major BOS 2b2 User manual

Major BOS 2b2
serial number 3799 and later

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Inhalt
Technical Data 2
Controls of Major BOS 2b2 3
Major BOS 2b2 4
Programming 4
Connectivity 4
Tastatur 4
Carrier Indication (Squelch) 5
Transmitter Indication (PTT) 5
Selection Indication 5
Microphone Selection 5
Tone Call Decoder 5
Tone Call Encoder 6
Recording Conversations 6
Several Control Sets in Parallel Circuit 6
Activate Busy-Lines 6
Read Busy-Lines 6
External Signalling Device 6
AF telephone connection 6
Operating in FMS mode 7
Functions for TETRA digital radios (SW version 1.02 or higher) 7
Potentiometers 8
Service Program 8
Registers of Major BOS 2a2 9
Sockets Pinout 15
Layout - Main Board 16
Layout - Connection Board 17
Jumpers and Potentiometers 17
Connection Cable to PC (RS232, Ord.No: 635090) 17
General Safety Information 18
Returning of Old Equipment 18
Release Notes 19
Order Information 19
Page
Technical Data
Supply Voltage +12V DC -15% +25%
Current consumption max. 1000 mA
AF input level
Recommended value for earpiece AF 500 mV (at 10 kOhm)
Input impedance approx. 10 kOhm
AF output level
Factory default 500 mV at 200 Ohm
Range 300mV to 700mV
Output impedance (Transmitting) approx. 200 Ohm
Output impedance (Receiving) high impedance (disconnected)
Tape Recorder output level
Factory default - 6 dBm (at 600 Ohm)
Range (Potentiometer P8) - 14 dBm to - 2 dBm (at 600 Ohm)
Output impedance approx. 600 Ohm
Weight (without cable) approx. 1650 g
Size (without gooseneck microphone)
weight x depth x height 245 x 220 x 90 mm

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Controls of Major BOS 2b2
12 3
6
7
8
12
11
1 - Transmitter indication
2 - Selection indication
3 - Receiver indication (Squelch)
4 - Selection key
5 - Monitoring volume
6 - PTT key
7 - Tone Call key (Call I and Call II)
8 - Master volume
9 - Loudspeaker
10 - PTT key handset
11 - Handset
12 - Gooseneck microphone
4
10
9
5

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Major BOS 2b2
Major BOS 2b2 is identical to Major BOS 2a2, except that Major BOS 2b2 has an additional
internal connection board making it largely compatible to Major BOS 4a and 8a. The most
important difference is found in the PTT output which always switches to 12 V in Major BOS 2b2
while the polarity can be chosen for Major BOS 4a and 8a.
Most of the working parameters can be configured via a computer using the programming
software.
Regarding functionality and connector pin assignment, Major BOS 2b2 compatible to Major BOS
2b.
Of course, there are several changes and new features:
- electrical, programmable potentiometers have replaced the analogous potentiometers
- programmable registers instead of jumpers
- programmable headset volume
- programmable amplification of the audio inputs from radio
- noise suppression for the inputs from radio
- tunable minimum volume for single radio circuits and tunable minimum overall volume
- AF settings (mute, listening, max. volume) can be adjusted separately for earpiece, loudspeaker,
and tape
- software option "NF-Squelch" (AF squelch)
- software option "Encoder/Decoder" permitted for up to four radio circuits
- flashing squelch LED and alarm tone on decoding of a call (call 1, call 2)
Programming
The Major BOS 2a2 can be configured using the Major BOS 2a2/2b2 programming software (download
at www.funktronic.de -> Service). Alternatively, the functions can be programmed directly in the
respective registers using a terminal program (e.g. hyper terminal).
The adjustment of the potentiometers, in general, is done using the terminal program.
Connectivity
The Major BOS 2b2 is connected to a 12V DC power supply unit. Up to four radios can be connected
to the control set. For every radio, squelch input, PTT output, busy-line (compatible to Major BOS
4a/8a, but NOT to Major BOS 2a2) as well as NF in- and outputs are available. Furthermore, Major
BOS 2b2 features connections for a headset, an external signalling device and a tape output. Via the
RS 232 interface a PC connection for programming purposes can be established.
As the NF outputs are only open during transmission, several Major BOS 2b2 can be connected in
parallel circuit.
Tastatur
The keypad consists of four selection keys for the different radio circuits, two tone call keys and the
red PTT key.

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Carrier Indication (Squelch)
Every one of the four radio circuits provides its own carrier indicator (Squelch), which is located above
the corresponding selection key. If using junction box MBOS2AB1, for activation the squelch input
needs a voltage between 5V and 14V. If MBOS2AB6 is used, the logic of the carrier indication is
configurable. The polarity of the carrier indication and the AF muting when no carrier is present can
be programmed.
Transmitter Indication (PTT)
Every radio circuit has its own transmitter indication, which is lit when the transmitter is activated.
This happens upon pushing the PTT button or one of the two tone call buttons. The LED blinks if a
parallel Major BOS 2b2 is on transmission.
Selection Indication
The selection indicator is permanentely luminous if the corresponding radio circiut is selected and
active. If it is in blinking state this circuit is busy and cannot be selected.
Selection of Base Stations / Radio Circuits
To connect to one of the four radio circuits the corresponding selection key has to be pressed. A
subsequent button press sets the circuit to inactive. To activate more than one channel hold the first
pressed button down and select further circuits. Programming the Major BOS2b2 can disable this
feature. Acitve circuits are indicated by a luminous selection indication LED. A busy radio cuircuit
is idicated by a blinking LED and cannot be activated. Radio circuits can be disabled, active radio
circuits on power-on can be programmed.
Loudspeaker and Volume Control
On transmission the loudspeaker is turned off automatically. If it is off, when the handset ist lifted, can
be programmed. The loudspeaker volume can be adjusted with the master volume control.
Microphone Selection
The Major BOS2b2 has three microphone routings available. The PTT button in the handset turns
on the handset's microphone. The red PTT button and the headset's PTT input can be configured
independently. Possible associations are gooseneck microphone, headset microphone or automatic
selection. If automatic selection is on, the headset microphone is used if a headset is detected
otherwise the gooseneck microphone is used.
Tone Call Decoder
The optional software "Encoder/Decoder" allows the Major BOS2b2 to decode Tone Call1 and Tone
Call2 on any radio circuit and to activate the corresponding circuit automatically.

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Tone Call Encoder
The Major BOS 2b2 includes a encoder for Tone Call 1 and Tone Call 2. The tone calls are sent with
the corresponding keys of the keypad. The tone is sent as long as the button is pushed.
Recording Conversations
Via the installed tape recorder output the recording of conversations is possible. The interface
comprises a potential-free AF output as well as a potential-free contact (electronic relay) to control
a recording device.
Several Control Sets in Parallel Circuit
As the AF outputs are only cut in during transmission and the NF inputs can be switched to high-
resistance using Jumpers J1 and J2, several Major BOS 2b2 can be connected to each other. Therefor,
all connections to the radio circuits (TX-AF, RX-AF, squelch and PTT keying) must be connected in
parallel (bus or star wiring). The outputs for the radio circuits are compatible to Major BOS 4a and 8a
and can be combined. Only the PTT heying represents an exception. It is always active to +12V for
Major BOS 2b2 and cannot be changed to PTT keying vs. GND.
A special task is fulfilled by the busy-lines of the radio circuits, that are only connected between the
control sets. The busy-lines of Major BOS 2b2, 4a and 8a are compatible with each other but they
are NOT compatible to those of Major BOS 2a2 and may not at all be connected to those!
Activate Busy-Lines
Every control set that is connected to the respective busy-line can signalise to the control sets
connected in parallel if a circuit is activated or if transimission is already in progress.
Read Busy-Lines
Every control set that is connected to the busy-line recognizes if the respective circuit is busy and
indicates this by a flashing transmission indicator or selection indicator. Furthermore can be configured
how Major BOS 2b2 reacts to busy radio circuits, e.g. PTT keying or selection of the circuit can be
blocked and/or incoming AF can be muted.
External Signalling Device
An external signalling device can be connected to Major BOS 2b2. The sensitivity of this potential-free
input is 500 mV at 3 kohm and cannot be varied. By operating the corresponding PPT input (PTT3)
the external signal is transmitted to the selected circuits.
AF telephone connection
By connecting the external headset adapter the headset can be used for conversation via telephone
and radio. Switching of the headset to telephone mode is achieved via the optocoupler input that has
to be programmed appropriately (see section Optocoupler Input).

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Operating in FMS mode
With the software option "Encoder/Decoder" Major BOS 2b2 can be extended to a FMS control panel.
Possible FMS functions are the ID transmission at PTT keying and the transmission of up to two
arbitrary, programmed FMS telegrams (e.g. conversation request) using the two call buttons. in this
case, these are, of course, no longer available to transmit call 1 or call 2.
By conneting our FMS handset Commander 5 FMS to the D-Sub connector for external conversation
devices (handpiece or headset), the Major becomes ready for FMS use.
Here, the FMS handset can also be used as an alternative to the usual handpiece of the Major.
Therefor, the PTT output of the Commander 5 FMS must be configured to GND.
Functions for TETRA digital radios (SW version 1.02 or higher)
For application in digital radio monitoring of the conversation request tone is necessary. As the Major
mutes its loudspeaker (LS) during transmission, this function has not been available if transmission
is conducted using the gooseneck (GN) microphone.
Thus, in version V1.02 and higher the LS can also stay active during a transmission with the GN
microphone. Circuits, on which no transmission takes place, are muted. Listening to active circuits
(current transmissions) is still possible during transmission. Here, the volume can be reduced.
This function can also be active if the LS would be muted because the handset is taken off.
For transmission using a different microphone (headset, handset or via external input) this option is
not available.
New registers:
270: Circuit 1
271: Circuit 2
272: Circuit 3
273: Circuit 4
Description for all 4 registers:
1st digit: 0 = if SH-PTT is keyed and handpiece is taken off, the LS status depends on
register 016/2
1 = if SH-PTT is keyed and handpiece is taken off, the LS is always active
4th-8th digit: max. volume for SH-PTT: 00000 (LS aus) to 32767 (max. volume)
Here, the listening volume for the circuit is set, the total volume depends on the
overall volume settings

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Potentiometers
By the use of the potentiometers the volume settings of the different radio circuits can be adjusted.
The functions of the potis are described in the table below:
Poti Function/Level
P1 RX-AF (listen) circuit 1
P2 RX-AF (listen) circuit 2
P3 RX-AF (listen) circuit 3
P4 RX-AF (listen) circuit 4
P5 loudspeaker AF, (total)
Service Program
For Major BOS 2b2 the programming of the registers and the calibration of the electronic potentiometers
is accomplished using the service program. This program is accessible via the serial interface (for
pin assignment see section Cable Connection to PC). For this purpose a suitable terminal program
can be used: e.g. HyperTerminal (Windows), minicom (Linux).
The configuration of the serial interface is as follows:
data transfer rate 9600 bit/s
start bit 1
data bits 8
parity none
stop bit 1
flow control none
If the Major BOS 2a2 is switched on and the terminal program is started, the service program starts
after pressing ENTER ¬. showing the following menu:
Online - Monitor MBOS2a2
------------------------
Software: MBOS2a2
Version : V1.00
SW-Datum: 07.04.10
Option : Encoder/Decoder + AF-Squelch
Rxxx................read register xxx
Pxxx yyyyyyyy.......program register xxx with yyyyyyyy
A...................potentiometer calibration
Tx..................TX-output off/on (0/1)
Ixxxx...............switch on tone generator with xxxxHz (0000=off)
H...................detection of a headset
Q...................software reset
X...................exit monitor

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Register Function
Registers of Major BOS 2a2
000 Radio circuit configuration 1
1st digit circuit 1 enabled, y = 1, n = 0
2nd digit circuit 2 enabled, y = 1, n = 0
3rd digit circuit 3 enabled, y = 1, n = 0
4th digit circuit 4 enabled, y = 1, n = 0
5th digit several active circuits possible y = 1, n = 0
6th digit on PTT if no circuit is active: use previous circuit = 0, error = 1
7th digit default "previous" circuit after power-on (binary sum of circuits = 0 - F)
001 Radio circuit configuration 2
1st digit circuit 1 enabled at power-on, j = 1, n = 0
2nd digit circuit 2 enabled at power-on, j = 1, n = 0
3rd digit circuit 3 enabled at power-on, j = 1, n = 0
4th digit circuit 4 enabled at power-on, j = 1, n = 0
5th digit circuits at power-on according to digits 1 - 4 = 0,
previously enabled circuits = 1
002 Squelch configuration 1
1st digit circuit 1
2nd digit circuit 2
3rd digit circuit 3
4th digit circuit 4
1st - 4th digit SQL active: AF = 2 (only with option AF-squelch)
high = 1
low = 0
003 Squelch configuration 2
1st digit circuit 1 AF is on: on squelch = 1, always = 0
2nd digit circuit 2 AF is on: on squelch = 1, always = 0
3rd digit circuit 3 AF is on: on squelch = 1, always = 0
4th digit circuit 4 AF is on: on squelch = 1, always = 0
004 Busy Out configuration
1st digit Busy Out circuit 1
2nd digit Busy Out circuit 2
3rd digit Busy Out circuit 3
4th digit Busy Out circuit 4
1st - 4th digit Busy Out Busy always off = 0
Busy active if TX is active = 1
Busy active if circuit is on = 2
005 Busy In LED configuration
1st digit Busy In circuit 1
2nd digit Busy In circuit 2
3rd digit Busy In circuit 3
4. digit Busy In circuit 4
1st - 4th digit Busy LED no function = 0
Busy active: TX-LED flashes = 1
Busy active: circuit-LED flashes = 2

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006 Busy In, configuration of functions
1st digit Busy In circuit 1
2nd digit Busy In circuit 2
3rd digit Busy In circuit 3
4th digit Busy In circuit 4
1st - 4th Stelle Busy In no function = 0
active, mutes circuit = 1
active, disables PTT keying =2
active, disables PTT keying and mutes circuit = 3
active, disables circuit activation = 4
active, disables circuit activation and mutes circuit = 5
active, disables activation of any circuit = 6
active, disables activation of any circuit and mutes circuit = 7
007 TX In LED configuration
1st digit TX In circuit 1
2nd digit TX In circuit 2
3rd digit TX In circuit 3
4th digit TX In circuit 4
1st - 4th digit TX In no function = 0
active, TX-LED flashes = 1
008 TX In Funktionskonfiguration
1st digit TX In circuit 1
2nd digit TX In circuit 2
3rd digit TX In circuit 3
4th digit TX In circuit 4
1st - 4th digit TX In no function = 0
active, mutes circuit = 1
active, disables PTT keying = 2
active, disables PTT keying and mutes circuit = 3
009 Duplex configuration
1st digit TX In circuit 1
2nd digit TX In circuit 2
3rd digit TX In circuit 3
4th digit TX In circuit 4
1st - 4th digit simplex = 0
duplex = 1
010 AF input configuration of deactivated circuits
011 AF input configuration of activated circuits
1st digit circuit 1 to loudspeaker
2nd digit circuit 2 to loudspeaker
3rd digit circuit 3 to loudspeaker
4th digit circuit 4 to loudspeaker
5th digit circuit 1 to earpiece
6th digit circuit 2 to earpiece
7th digit circuit 3 to earpiece
8th digit circuit 4 to earpiece
1st - 8th digit circuit is muted = 0
listening volume = 1
maximum volume = 2 or 3
Register Function

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012 Tape relay configuration 1
1st digit relay on: at TX, y = 1, n = 0
2nd digit relay on: at every SQL, y = 1, n = 0
3rd digit relay on: at SQL on an activated circuit, y = 1, n = 0
013 Tape relay configuration 2
1st - 3rd digit overrun time of tape relay: nnn * 1 s (0 - 655 s)
012 AF input configuration of deactivated circuits
013 AF input configuration of activated circuits
5th digit circuit 1 to tape
6th digit circuit 2 to tape
7th digit circuit 3 to tape
8th digit circuit 4 to tape
5th - 8th digit circuit is muted = 0
listening volume = 1
maximum volume = 2 or 3
014 Headset configuration 1
1st digit microphone for red PTT-button
2nd digit microphone for external PTT-button
1st - 2nd digit gooseneck (GN) microphone = 0
headset (HS) microphone = 1
automatically switch to HS = 2
(no HS => GN microphone; headset present => HS microphone)
015 Headset configuration 2
1st digit threshold value for headset detection nnn (000 - 999) * 5 mV
if voltage is lower than threshold => headset is considered connected
016 Configuration of earpiece and loudspeaker
1st digit earpiece is off, if hung up = 0, earpiece is always on = 1
2nd digit loudspeaker is off, if earpiece taken off = 0, louspeaker is always on = 1
019 Functions of buttons CALL1, CALL2, PTT
1st digit function FMS ID code on PTT, y = 1, n = 0
2nd digit function CALL1-button
3rd digit function CALL2-button
2nd - 3rd digit no function = 0
CALL1/2 transmits as long as button is pushed = 1
send FMS 1/2 telegram = 2 (option Encoder/Decoder)
send tone sequence 1/2 = 3 (option Encoder/Decoder)
6th digit circuit(s) for CALL1-button, current = 0, binary sum of circuits = 1 - F
7th digit circuit(s) for CALL1-button, current = 0, binary sum of circuits = 1 - F
020 FMS telegram for PTT buttons
1st - 8th digit FMS ID-code (BLOOFFFF)
021 FMS telegram for CALL1 button
1st - 8th digit FMS 1 telegram (BLOOFFFF)
022 FMS telegram for CALL2 button
1st - 8th digit FMS 2 telegram (BLOOFFFF)
Register Function

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023 Digits 9 and 10 in all of the 3 FMS telegrams
1st digit circuits where a FMS ID-code may be sent
(binary sum of circuits = 0 - F)
2nd - 3rd digit digits 9 and 10 for ID-code (register 020)
4th - 5th digit digits 9 and 10 for FMS 1 (register 021)
6th - 7th digit digits 9 and 10 for FMS 2 (register 022)
8th digit improved forerun and final bit 0 = 0
improved forerun and final bit 1 = 1
forerun according to standard procedure and final bit 0 = 2
forerun according to standard procedure and final bit 1 = 3
031 Tone sequence 1 for CALL1-button
032 Tone sequence 2 for CALL2-button
1st - 5th digit 5-tone sequence
041 Tone call decoder circuit 1
042 Tone call decoder circuit 2
043 Tone call decoder circuit 3
044 Tone call decoder circuit 4
1st digit decode tone calls: none = 0, call1 = 1, call 2 = 2, both calls = 3
2nd digit activation of circuit upon decoded call
no activation = 0
activate new circuit, if no TX and handset lies on Major = 1
activate new circuit, if no TX = 2
activate new circuit = 3
no activation of additional circuit = 4
activate additional circuit, if no TX and handset lies on Major = 5
activate additional circuit, if no TX = 6
activate additional circuit = 7
3rd digit SQL-LED does not flash, no ring tone = 0
SQL-LED does not flash, ring tone = 1
SQL-LED flashes, no ring tone = 2
SQL-LED flashes, ring tone = 3
051 1st - 3rd digit Time limit for transmission (nnn * 1 s)
055 Configuration of forerun / overrun
1st - 2nd digit nn * 10 ms forerun time before tone sequence / FMS
3rd - 4th digit nn * 10 ms overrun time after tone sequence / FMS
5th - 6th digit nn * 10 ms time of advance PTT keying without AF
(may be no larger than 1st - 2nd digit)
080 Reference for tone sequence decoder 1
1st - 3rd digit max. duration of 1st tone = nnn * 5 ms
4th - 5th digit min. duration for all tones = nn * 5 ms
081 Reference for tone sequence decoder 2
1st - 3rd digit max. tone duration beginning with 2nd tone = nnn * 5 ms
5th digit tone call system : ZVEI = 0
CCIR = 1
ZVEI2 = 2
EEA = 3
ZVEI3 = 4
Register Function

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082 Reference for tone sequence encoder
1st - 2nd digit duration of 1st tone = nn * 10 ms
3rd digit duration of other tones = n * 10 ms
4th - 5th digit pause between call and ID-code = nn * 10 ms
083 Reference for group call decoder circuit 1
084 Reference for group call decoder circuit 2
085 Reference for group call decoder circuit 3
086 Reference for group call decoder circuit 4
1st - 2nd digit min. tone duration for single tone decoder = nn * 100 ms
3rd - 4th digit max. tone duration for single tone decoder = nn * 100 ms
(00 = decode as soon as min. duration is reached)
5th - 6th digit min. tone duration for special tone decoder (Ruf 1 / 2) = nn * 100ms
7th - 8th digit max. tone duration for special tone decoder (Ruf 1 / 2) = nn * 100ms
(00 = decode as soon as min. duration is reached)
089 Tone recognition
4th - 8th digit min. level for tone recognition from circuit 1 - 4 (0 - 32768)
210 noise suppression (AF mute) circuit 1
211 noise suppression (AF mute) circuit 2
212 noise suppression (AF mute) circuit 3
213 noise suppression (AF mute) circuit 4
1st - 2nd digit threshold value for activation of AF mute = nn * 0.9 mV
3rd - 4th digit threshold value for deactivation of AF mute = nn * 0.9 mV
214 AF squelch configuration circuit 1
215 AF squelch configuration circuit 2
216 AF squelch configuration circuit 3
217 AF squelch configuration circuit 4
1st - 2nd digit nn * 5 ms above threshold value until SQL
3rd - 4th digit threshold value (AF present) = approx. nn * 1.8 mV
5th - 6th digit nn * 5 ms below threshold value until SQL is gone
7th - 8th digit threshold value (AF gone) = approx. nn * 1,8 mV
220 Output level radio AF -> LS
221 Output level poti test tone -> LS
222 Output level call -> LS
223 Output level ringtone -> LS
230 Output level radio AF -> earpiece / headset
231 Output level poti test tone -> earpiece / headset
232 Output level call -> earpiece / headset
233 Output level ringtone -> earpiece / headset
240 Output level radio AF -> tape
241 Output level poti test tone -> tape
242 Output level call -> tape
243 Output level ringtone -> tape
250 Output level radio AF -> radio
251 Output level poti test tone -> radio
252 Output level call -> radio
253 Output level ringtone -> radio
4th - 8th digit 00000 = off - 32768 = maximum
Register Function

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260 Input level adjustment and min. volume for circuit 1
261 Input level adjustment and min. volume for circuit 2
262 Input level adjustment and min. volume for circuit 3
263 Input level adjustment and min. volume for circuit 4
1st - 3rd digit input level
-6,0 dB (000) ... 0dB (060) ... +19,5 dB (255)
4th - 8th digit min. volume level (00000 - 32768)
264 4th - 8th digit Min. overall volume level (00000 - 32768)
270 TETRA function for circuit 1
271 TETRA function for circuit 2
272 TETRA function for circuit 3
273 TETRA function for circuit 4
1st digit 0 = if SH-PTT is keyed and handpiece is taken off, the LS status depends on
register 016/2
1 = if SH-PTT is keyed and handpiece is taken off, the LS is always active
4th - 8th digit max. volume for SH-PTT: 00000 (LS aus) to 32767 (max. volume)
Here, the listening volume for the circuit is set, the total volume depends on
the overall volume settings
Register Function

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Sockets Pinout
All of the schemes show the sockets as viewed from the rear of the Major.
Pinout FK 1-4 (radio circuits)
ST1 - 4
RX-AF input (earpiece +) 1
RX-AF input (earpiece
- ) 2
squelch input (carrier) 3
GND (ground) 4
busy-line 5
(do not connect to radio!)
PTT output 6
(open collector max. 100mA to +12V)
TX-AF output (mod. +) 7
TX-AF output (mod.
- ) 8
AF in/outputs are equipped with transformers and thus
potential-free.
Pinout Power
ST14
12V-DC, max 1.5 A,
inside: positive pole, outside: GND
Pinout RS 232
ST6
TXD (RS232) 1
RXD (RS232) 2
GND 3
PTT keying input 4
ext.signalling device (PTT3, to GND)
free 5
free 6
AF input ext. sign. device Ext_NF (mod +) 7
AF input ext. sign. device Ext_NF (mod
- ) 8
Pinout TB (Tape)
ST5
tape switch contact 1
tape switch contact 2
AF output A (mod. +) 3
AF output B (mod.
- ) 4
AF output A-B is equipped with a transformer and thus
potential-free.
The switch contact of the tape is an electronic relay
output.
Pinout PTT (headset switching)
ST11
PTT keying input, HS (PTT2, to GND) 1
+battery output power supply voltage 2
for headset adapter
control line 3
for headset adapter
optocoupler input (anode +)
4
optocoupler input (cathode
- ) 5
GND (PTT2-GND)
6
Pinout Headset ST10
PTT keying input HS (PTT2, to GND) 1
AF input HS (microphone +) 2
AF output HS (earpiece +) 3
GND AF output HS (earpiece
- ) 4
GND AF input HS (microphone
- ) 5
GND (PTT2-GND)
6
There are two sockets intended for headset use. The
headset itself is connected to ST10. An ext. PTT switch
(e.g. foot switch) can be connected to ST11.
ST14 ST5 ST6 ST11 ST10 ST4 ST3 ST2 ST1

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Layout - Main Board
Socket ST1, ST2, ST10, ST12 --> Connection Board
Socket ST5 to ST8 --> option for UGA modules
ST 5 UGA module radio circuit 4
ST 6 UGA module radio circuit 3
ST 7 UGA module radio circuit 2
ST 8 UGA module radio circuit 1
Stecker ST3 --> display
Stecker ST4 --> handset
Stecker ST9 --> gooseneck microphone
Stecker ST11 --> hook and loudspeaker
pin 1 tuning fork contact (hook)
pin 2 GND
pin 3 AF output loudspeaker
pin 4 GND
ST 3 ST 12 ST 11
ST 10
ST 4
ST 1 ST 2

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Layout - Connection Board
Jumpers and Potentiometers
Jumper Position Function
J1A 1-2 RX-AF input circuit 1 is 600ohm/20kohm (1 / 2)
J1B 4-5 RX-AF input circuit 2 is 600ohm/20kohm (1 / 2)
J2A 1-2 RX-AF input circuit 3 is 600ohm/20kohm (1 / 2)
J2B 4-5 RX-AF input circuit 4 is 600ohm/20kohm (1 / 2)
Poti Function/Level
P1 RX-AF circuit 1
P2 RX-AF circuit 2
P3 RX-AF circuit 3
P4 RX-AF circuit 4
Connection Cable to PC (RS232, Ord.No: 635090)
ST6 Function 9pin COM at PC
1 TxD 2
2 RxD 3
3 GND 5

- 18 - mbos2b (13.03.2014)
Kompetent für Elektroniksysteme
Please read the operating instructions carefully before installation and setup.
The relevant regulations must be complied to when working with 230V line voltage, two-wire-
lines, four-wire-lines and ISDN-lines. It is also very important to comply to the regulations
and safety instructions of working with radio installations.
Please comply to the following safety rules:
- All components may only be mounted and maintained when power is off.
- The modules may only be activated if they are built in a housing and are scoop-proof.
- Devices which are operated with external voltage - especially mains voltage - may only
be opened when they have been disconnected from the voltage source or mains.
- All connecting cables of the electronic devices must be checked for damage regularly
and must be exchanged if damaged.
- Absolutely comply to the regular inspections required by law according to VDE 0701
and 0702 for line-operated devices.
- Tools must not be used near or directly at concealed or visible power lines and conductor
paths and also not at and in devices using external voltage – especially mains voltage -
as long as the power supply voltage has not been turned off and all capacitors have been
discharged. Electrolytic capacitors can be still charged for a long time after turning off.
- When using components, modules, devices or circuits and equipment the threshold
values of voltage, current and power consumption specified in the technical data must
absolutely be complied to. Exceeding these threshold values (even if only briefly) can
lead to significant damage.
- The devices, components or circuits described in this manual are only adapted for the
specified usage. If you are not sure about the purpose of the product, please ask your
specialized dealer.
- The installation and setup have to be carried out by professional personnel.
Returning of Old Equipment
According to German law concerning electronic devices old devices cannot be disposed off
as regular waste. Our devices are classified for commercial use only. According to § 11 of
our general terms of payment and delivery, as of November 2005, the purchasers or users
are obliged to return old equipment produced by us free of cost. FunkTronic GmbH will
dispose of this old equipment at its own expense according to regulations.
Please send old equipment for disposal to: FunkTronic GmbH
Breitwiesenstraße 4
36381 Schlüchtern
GERMANY
>>> Important hint: freight forward deliveries cannot be accepted by us.
February 2nd , 2006
Subject to change, Errors excepted
General Safety Information

mbos2b (13.03.2014)
- 19 -
Kompetent für Elektroniksysteme
06.09.12 - German version of Major BOS 2b2 manual translated into English.
13.03.14 - Order Information (RS232 cable) added
Release Notes
Order No. Description
631020 Major BOS 2b
635090 Programming cable for RS232
900011 Puwer supply unit for Major BOS 1a, 2b, 4a, 8a
Order Information