MOBILE INTERCOM RI-32 User manual

1
mobileintercom.ru
mobileintercom[email protected]оm
WIRELESS INTERCOM RI-32 USER MAUNAL
Introduction
RI-32 Wireless Intercom Unit is capable
to interconnect up to six speakers at
once using different type of headsets:
Bluetooth (ver. Up to 3.0+) –3 pcs;
Wired (3.5mm jack) –2 pcs;
External balanced audio –1 pcs.
Internal rechargeable battery runtime is
up to 5 hours.
Physical dimensions: 127mm x 79mm x
22mm, weight 133 g.
Operational temperature: from -10°C to
+40°C.
Device overview
1 Display
Please see the explanations below in this manual.
2 Talk button
This button changes internal audio routing when pressed. You can attach
external PTT button using Talk jack.
Basic operations: (see “Normal Mode” and “PTT Mode” below for more
details)
Push the button briefly to switch PTT mode on and off;
Press and hold the button to keep PTT mode on, and release it to turn PTT
mode off.

2
3 ESC button
Push this button to exit settings menu.
4 External connections
5Navigation buttons
Use arrows/OK buttons to change settings (see below).
6 Power on/off button
Use the buttons to switch unit on and off.
Operational diagram
Please note:
You can use BT3 port to
connect Bluetooth-enabled GSM
mobile phone instead of BT headset;
EXT jack has galvanic isolation
transformer and support balanced
audio in/out.

3
Initial screen status
Upper right
Percentage of battery charge and recharging sign “∧”
when connected to an external DC power source.
Upper left
“T” symbol indicates that Talk/PTT mode is active. Symbols “1”, “2”or “3”indicate
that MFB mode is currently on for the corresponding headset.
(See more details below at 1. CONNECTIONS and 10. PTT)
Central area
Status of Bluetooth ports (BT1 –BT3) showing useful information on connected
headsets:
Headset model - in case if this port is connected
<no pair> - if no headset has been designated to this port
<not connected> - when designated headset is not available
Lower part
You can revise or modify input volume level for each of the Bluetooth ports. Use Left
/ Right arrow keys to select one of BT1 –BT3 ports and Up / Down to adjust input
level.
MAIN MENU:
Please use OK button to enter the Main Menu:
1. Connections
2. Saved devices
3. Bluetooth 1
4. Bluetooth 2
5. Bluetooth 3
6. GSM mode
7. Line A

4
8. Line B
9. Line Ext
10. PTT
11. Presets
12. Full reset
Use Up / Down arrow buttons to select menu item and OK button to review its
settings.
1. CONNECTIONS:
There’re 5 different sub-items in Connection menu:
•Normal Mode
•PTT mode
•BT1 MFB
•BT2 MFB
•BT3 MFB
NORMAL MODE
Normal audio routing mode is active when Talk/PTT
and MFB modes are off, so this is the default operation
mode for the unit. Leftmost column represent all the
sources, and the upper row contains all the
destinations. The numbers at the sources and
destinations cross-points represent audio levels for
each pair of source & destination.
Use arrow keys to navigate and short OK button clicks to select volume level from 0
to 10.
PTT MODE
PTT mode is an alternative routing table being activated when the TALK (or external
PTT) button is pressed. Follow the same process as for the Normal mode to set the
audio levels between sources and destinations.

5
BT1 MFB
BT2 MFB
BT3 MFB
MFB (Multi-Function button) is usually the main button of
a Bluetooth headset. In case of AirPods™ just use
double tap.
MFB mode is an alternative routing table being activated
when the MFB button of a specific headset (BT1-BT3) is
pressed. Follow the same procedure to set audio levels
between sources and destinations as for the Normal mode, for each of connected
headset.
Please note that MFB (and PTT) mode fully overrides Normal routing table when
activated. If some of Normal mode interconnections are not configured for MFB (or
PTT) mode –they will be disconnected. In addition, you can set priority of PTT mode
over MFB. (More details at 10. PTT)
Press MFB button one more time to deactivate MFB mode and revert routing table to
Normal mode. You can set timeout for automatic deactivation if needed. (Please
see 10. PTT)
While MFB mode is activated, you will see the number of active headset in the upper
left corner of the display and will hear confirmation tone in the headset. Lower
pitched tone will indicate deactivation of this mode.
MFB mode functionality can be completely deactivated
by pressing ESC button for a few seconds while you in
the main menu. You will see L(lock) symbol at the top
row of the screen as a confirmation.
2. SAVED DEVICES:
This menu item will let you browse the list of twelve last connected Bluetooth
headsets. You can select desired headset and assign it to the specific BT port of the
Intercom. During the process, you have to put this headset into the pairing mode.
Since paired, the headset will reconnect to this BT port until it will be replaced of
forgotten (refer to 3.-5. BLUETOOTH 1,2,3).

6
The pairing procedure can take some time (up to minutes) and will very likely to fail if
your headset was not in paring mode at the right moment.
3. - 5. BLUETOOTH 1,2,3:
This menu item indicates BT port status and gives you control over the BT headset
connection.
Please use the headset’s paring mode to connect:
Refer to headset’s manual to put the headset to pairing mode
Start Bluetooth scanning by selecting Scanmenu item and pressing OK button
Choose desired headset and press OK
Exit menu by pressing ESC
Since BT headsets broadcast themselves periodically, it may take some time to
appear in scan results –please be patient.
In order to disconnect BT headset please select corresponding BT port, select Pair
from the menu, press OK. Then you will see Forget device, so press OK to release
the headset.
You can also adjust input audio level from -18 dB to 0 dB for the specific BT port by
using Left and Right arrow buttons.
6. GSM MODE:
This menu item will convert BT3 port to a “headset mode”, so you will be able to
connect Intercom to your Bluetooth-enabled mobile phone as a wireless headset
(name –Intercom).
Important notice: only HFP/HSP protocol is supported by this mode, meaning that
only incoming/outgoing phone calls will be routed to Intercom, but not the music
played.
7. - 8. LINE A-B:
These items will let you to adjust input audio level for wired headsets Aand Bfrom -
18 dB to 0 dB by using Left and Right arrow buttons. Press ESC to exit.

7
9. LINE EXT:
This item allows to adjust Input audio level from -18 dB to 0 dB and Output audio
level from -24 dB to 0 dB (and Mute) for EXT connection by using Left and Right
arrow buttons. Press ESC to exit.
Please note that PTT (Push To Talk) function that changes internal audio
routing is being activated by TALK button on the front panel, or by external
button connected to PTT port.
10. PTT:
PTT mode activates alternative audio routing table configured at 1.Connections –
PTT Mode and it fully overrides NORMAL mode routing, all NORMAL mode
connections will be dropped if not configured for PTT mode.
This menu item lets you to setup the following parameters:
PTT timeout (5, 10, 20, 60 seconds or OFF) is
intended to switch PTT mode (or MFB mode) off after
certain amount of time and return to NORMAL routing
mode. In case if this timeout set to OFF, the only way to
return to NORMAL mode is to click PTT (or MFB)
button again.
You can also set here MFB button priority over PTT –any High priority MFB button
will override active PTT mode.
11. PRESETS:
You can backup and restore all connection settings to/from Intercom’s memory
using this menu item.
12. FULL RESET:
Press and hold OK button for 3 seconds to revert Intercom to factory settings (this
will clear audio levels, headset connections, presets, etc.)

8
CABLES PINOUT:
Please use typical stereo headset pinout for ports LA –LB:
PTT (TALK) port pinout:
EXT port pinout:
EXT port has 100-Ohm isolation transformers for input and output audio lines.

9
If you Intercom set contains red colored Jack(4pin) –Jack(4pin) cable please use it
to connect external device to EXT port. Red plug of this cable is designated for EXT
port, and pink one –for external device like mobile phone or A/V sender over cellular
network (LiveU™, TVU™, etc).
Important notice:Some of audio devices detect connection of external microphone
by electric resistance. In this case you have to use ~3.5 kOhm resistor at the mic
input circuit for your EXT port cable (LIN+ pin at the diagram above, biggest one
closer to cable).
Additional tips:
1) The working range of Bluetooth headsets mainly depends on two factors: its
transmitter power and how busy is the 2.4 GHz radio band with another Wi-Fi and
Bluetooth devices.
Transmission power is defined by BT Class:
Class 1 –100 mW (expect up to 100 meters range)
Class 3 –1 mW (usually about 10 meters)
If you need bigger range –choose Class 1 and try to avoid places with high density
of Wi-Fi networks at 2.4 GHz.
Sometimes the same headset can reach up to 100 meters in a park but only 20
meters in a city center.
2) LA –LB ports pinout was designed for typical PC/smartphone headsets and
provides necessary power to electret mic. You can use special adapter (not
included) to connect dynamic microphone but due to asymmetric input there may be
output sound leakage to input line. This interference comes from cable inter-lines
electric capacity and fully depends on quality of headset’s cable. Try to use shielded
one.
3) Use only high quality microUSB cable to recharge internal battery of Intercom.
Low quality thin cables has higher electric resistance, this can overload and break
the internal power driver of Intercom. Fully charged battery can power the device for
more than 5 hours.
All product names, logos, and brands are property of their respective owners. All company, product and service names used in
this manual are for identification purposes only. Use of these names, logos, and brands does not imply endorsement.
mobileintercom.ru