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BTR-24
User Manual 2
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User Manual
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Telex BTR-24, TR-24 User Manual 2

Operating Manual
BTR-24 TR-24 Wireless Intercom System
Bosch Communications Systems
Table of Contents
Section 1 Introduction .................................................................1-1
General Description.....................................................................1-1
System Features........................................................................1-1
Section 2 BTR-24 Base Station ..........................................................2-1
Controls and Connections ................................................................2-1
Section 3 TR-24 Beltpack...............................................................3-1
Controls and Connections ................................................................3-1
Section 4 Specifications ................................................................4-1
System Technical Specifications ...........................................................4-1
Section 5 Operation ...................................................................5-1
Wireless Mode.........................................................................5-1
Wired Mode...........................................................................5-3
Master Wireless Mode...................................................................5-5
Battery Charging Instructions .............................................................5-7
Section 6 Encryption and Password ......................................................6-1
Encryption Code .......................................................................6-1
Login Password........................................................................6-1
Software Version.......................................................................6-1
Logging into a Unit .....................................................................6-1
User Menu Options .....................................................................6-2
Section 7 Battery Care/Long Term Storage ................................................7-1
Battery Care...........................................................................7-1
Long Term Storage .....................................................................7-1
Li-Ion Batteries ........................................................................7-1
Section 8 Trouble Shooting .............................................................8-1
Section 9 RF Channels .................................................................9-1
RF Channels ..........................................................................9-1
Section 10 Regulatory Information.......................................................10-1
Regulatory Information.................................................................10-1
Section 11 Accessories and Replacement Parts .............................................11-1
Section 1 - Introduction
General Description
The Telex BTR-24 System is a full duplex (simultaneous talk and listen), multi-channel, wireless intercom system. The system offers a complete solution for up to 10, full duplex users per base station, many more if in push-to-transmit mode. With fast and easy set-up, durable beltpacks, 64 bit audio encryption, and professional grade headsets.
The main components of this system consists of the TR-24 beltpack and the BTR-24 base station.
The TR-24 beltpack offers the user three audio channels; Audio Channel 1, Audio Channel 2, and both audio's combined. The user can talk and listen on these channels or just turn off the talk button and listen only.
The beltpacks have the ability to communicate with each other in wireless, wired or master wireless modes. In wireless mode, beltpack communicate to each other using the base station as a relay. In wired mode, beltpacks turn off their wireless ability and communicate via an ethernet cable or a buildings ethernet backbone. Finally in master wireless mode, a beltpack can become base station and serve as the wireless relay for coverage over an area.
The beltpack uses an internal rechargeable Li-Ion battery that will provide up to 8 hours of uninterrupted operation.
System Features
• No FCC License required.
• Easy base station and beltpack setup.
• Uses mature 2.4GHz IEEE 802.11 Wireless LAN
Technology.
• A beltpack can serve as a base station if needed.
• Beltpacks can communicate to each other wired or wireless.
• Audio in the system is encrypted via a 64 bit DES algorithm.
• Base station automatically selects the clearest RF channel for
the system, and sets the system on that channel. No user intervention is needed.
• Easy to read base station LED display to indicate the RF
channel of the system.
• If desired, the user can select any one of the eleven standard
802.11 channels for the system to operate via a single button on the BTR-24 front panel.
• Durable, water resistant, ABS, beltpack cases.
The BTR-24 base station can support up to ten TR-24 beltpacks in full duplex mode and more if in push-to-transmit mode. The base station provides a central relay location which handles the audio traffic between beltpacks. The built-in base station intelligence called ClearScan™ automatically selects the best RF (Radio Frequency) channel for communications on start-up. The base station also uses an internal rechargeable Li-Ion battery that will provide up to 10 hours of uninterrupted operation.
• Dependable, rechargeable, wide temperature range, Li-Ion
batteries.
• Low battery indications on the beltpack and base station.
• Base station and beltpacks can be powered from external AC
or internal battery.
1-1
ONON
OFFOFF
LOW
BATTERY
POWER
AP
ACTIVE
CHANNEL
Telex
R
SELECT
CHANNEL CLEAR SCAN
LOCK
BTR-24
1
2 3 4 5
Section 2 - BTR-24 Base Station
RED: CHARGING GREEN: READY
PGM
TRANSMIT ANTENNA
12 VDC
400mA
CORD
RETAINER
RECEIVE ANTENNA
BTR-24
Telex Communications, Inc.
This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions
(2) This device must accept any interference, received.
(1) This device may not cause harmful interference, and
Including interference that may cause undesired operation.
Made in U.S.A. XXXXXXXXX
FCC ID:B5DM525
IC: 1321A-XOAP S.N.: 000003
6
7 9
8
10
Controls and Connections
Front View
1. On/Off Switch – Turns the power on/off to the base station.
2. Power / Low Battery Light – Indicates the base station has power, either from the internal battery or external power connected to the unit.
Battery Indication:
• GREEN = Battery OK
• RED = Battery Low ( »30 minutes left)
• No Light = Battery Depleted
3. AP Active Light – This green light flashing indicates that the AP has successfully booted and is operating.
4. RF Channel Display – Indicates the RF channel the unit is set on.
5. Select Button – Press the button to select the desired RF channel for the base station.
• ClearScan – Press and hold the button until the decimal
point starts to flash (about 3 seconds) then release. The unit will examine the RF channels available, then select the one with the least activity and set the AP on that channel. NOTE: On boot the unit will ClearScan and automatically select the cleanest RF channel.
Rear View
6. Receive Antenna Jack – Reverse TNC receive jack.
7. Charge/Power Jack – Used to charge the internal battery or power the unit directly off a wall outlet. Accepts a 5.5mm x
2.5mm plug with the center positive. Must be supplied with a 12VDC regulated power supply with at least a 400mA current capacity.
8. Charge Light.
• RED = Battery is charging.
• GREEN = Battery is charged.
9. Configuration Jack – RJ-45 jack is used to interface the base station to an Ethernet cable. jack may be used for configuring the base station or connecting multiple base stations
10.
Transmit Antenna Jack – Reverse TNC transmit jack.
• Lock – Press and hold the button until the decimal point is
on solid (about 10 seconds) then release. The AP will be locked on the channel displayed. To unlock, press and hold the button again until the decimal point is off. Lock makes the currently displayed channel difficult for a user to accidentally change.
2-1
Section 3 - TR-24 Beltpack
1
2
3
OFF
MIC
S.T.
A J
D
1
2
4
5
A J
D
CHG
EXT
6
7
8
9
(1) Microphone Shield (-)
(2) Microphone Audio (+)
(3) Headphone High (+)
(4) Headphone Low (-)
Controls and Connections
Top View
1. Volume Control and Power Switch – Turns the beltpack power on/off and controls headset volume.
2. Battery Light/Power Light – Indicates the beltpack has power, either from the internal battery or AC power connected to the unit.
• GREEN = Battery Indication: battery OK
• RED = Battery Low (»15 minutes left)
• NO Light = Battery Depleted
3. Button One and Light – Selects audio channel one. The channel light has two modes depending on the <TALK> button's state.
• Light Solid = Talk and Listen enabled.
• Light Flashing = Listen only enabled. (Push-to-TX)
4. Talk Button – Enables the headset microphone. The button has two modes:
• Momentary = Pressed and hold for over ½ second.
• Latch on/off = Tap button and the microphone path is
enabled. Tap again to turn off.
5. Button Two and Light – Selects Audio channel two. The channel light has two modes depending on the <TALK> button's state.
• Light Solid = Talk and Listen enabled.
• Light Flashing = Listen only enabled. (Push-to-TX)
Bottom View
6. Charge Jack – Used to charge the internal battery or power unit directly off wall outlet. Accepts a 5.5mm x 2.5mm plug with the center positive. Must be supplied with a 12VDC regulated power supply with at least a 400mA current capacity.
7. Charge Light.
• RED = Beltpack battery is charging.
• GREEN = Beltpack battery is charged.
8. Headset Connector – Standard 4-pin XLR connector.
Configuration Jack – RJ-45 jack used to interface the
9. beltpack to an Ethernet cable. Jack may be used for wired
mode and configuring the beltpack.
Beltpack Button Combinations (All have voice prompts):
Wireless Mode .................Press <Talk> until unit is done
booting
Wired Mode .....................Press <TWO> until unit is done
booting.
Master Wireless Mode .....Press <ONE> until unit is done
booting.
Momentary Mode.............Press <ONE> + <TALK> + <TWO>
(Push-to-TX full time) for 3 seconds. Press the three buttons
again to go back to the default
"Push-to-Latch" mode.
Microphone Gain .............Press <ONE> + <TALK> for 3
seconds. Keep <TALK> held down
and use <ONE> to decrease the gain,
<TWO> to increase it. Release all
buttons for at lease 1 second to set.
Sidetone Level..................Press <TALK> + <TWO> for 3
seconds. Keep <TALK> held down
and use <ONE> to decrease the
level, <TWO> to increase it. Release all buttons for at least 1 second to set.
3-1
Section 4 - Specifications
System Technical Specifications
RF Technology............................................................................................................IEEE 802.11 (WiFi)
Frequency Band of Operation ......................................................................................2.412 to 2.462 GHz
FCC License ..............................................................................................................No License Required
Encryption Technology.............................................................64 bit (DES) Digital Encryption Standard
Audio Frequency Range................................................................................400 Hz to 5500 Hz (+/- 1dB)
Dynamic Range................................................................................................................................>75 dB
Beltpack Headset Output ............................................................200 mW into 300 Ohms (1% Distortion)
Beltpack Microphone Gain Adjustment .....................................................10 Levels with Voice Prompts
Antenna (TR-24)................................................................................................................Internal Dipoles
Antenna (BTR-24).......................................................................Multiple omni and Directional available
BTR-24 (Base Station) Battery .........................................................................Lithium-Ion Rechargeable
BTR-24 Battery Life...........................................................................................................10 Hr (Typical)
BTR-24 Recharge Time ................................................................................................10-14 Hr (Typical)
BTR-24 Low Battery Indication...................................................30 minutes of battery life left (Typical)
TR-24 (Beltpack) Battery..................................................................................Lithium-Ion Rechargeable
TR-24 Battery Life ...............................................................................................................8 Hr (Typical)
TR-24 Recharge Time.......................................................................................................6-8 Hr (Typical)
TR-24 Low Battery Indication......................................................15 minutes of battery life left (Typical)
BTR-24 (Base Station)Size........................6.00” L x 7.63” W x 1.72” H (15.24cm x 19.37cm x 4.37cm)
BTR-24 Weight..............................................................................................................2 lb 11 oz (1.2 kg)
TR-24 Size ...................................................5.25” L x 3.75” W x 1.68” H (13.33cm x 9.53cm x 4.27cm)
TR-24 Weight........................................................................................................................12.5oz (354g)
Carry Case Size....................................23.50” L x 8.50” W x 20.50” H (59.70cm x 21.60cm x 52.07cm)
Carry Case Weight ......................................................(Not Loaded with Equipment)12 lb 8 oz (5.44 kg)
4-1
Section 5 - Operation
ON
OFF
LOW BATTERY
POWER
AP ACTIVE
CHANNEL
Telex
R
SELECT
CHANNEL CLEAR SCAN LOCK
BTR-24
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
ON
OFF
LOW
BATTERY
POWER
AP
ACTIVE
CHANNEL
Telex
R
SELECT
CHANNEL CLEAR SCAN LOCK
BTR-24
ON
OFF
LOW
BATTERY
POWER
AP
ACTIVE
CHANNEL
Telex
R
SELECT
CHANNEL CLEAR SCAN LOCK
BTR-24
CONNECTED BY ETHERNET CABLE
LOCATION
1
LOCATION
2
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Telex
TR-24
R
Wireless Mode
Description
The TR-24 has the ability to be booted in one of three modes. These modes are wireless, wired and master wireless. This section will discus the wireless mode.
The wireless mode is the most used mode of the beltpack. The wireless mode is set by holding the <TALK> button down as the unit boots. Then release it once a channel LED has lit indicating communication has started. In this mode the beltpack’s radio is active and the bottom RJ-45 Ethernet connection is deactivated. The beltpack communicates to other beltpacks wireless via a base station (This base station could be another beltpack if it was set to boot in master wireless mode.). The base station serves as a “relay” for audio packets going between beltpacks. One base station can serve up to ten beltpacks in full duplex mode (simultaneous talk and listen).
Multiple base stations can also be utilized in an installation. The base stations have the ability to communicate to each other via an Ethernet network connected to the RJ-45 jack on the rear panel. The connection between bases could be a direct connection via an Ethernet cable (100m, 328ft Max.) or connected via the building’s Ethernet infrastructure (See “Network Information” in the “Wired Mode” discussion for details.). Due to the base station’s wired interconnection, the beltpacks of the various base stations can communicate with each other.
Ten full duplex beltpacks is still the limit even if multiple base stations, connected via Ethernet, in non-overlapping RF coverage areas, are in a system.
Figure 5-1
Ten Beltpacks in Wireless Mode
With ten beltpack in full duplex, up to 28 additional beltpacks can work off the base station if these beltpacks are in Push-to-TX mode. In Push-to-TX mode the beltpacks are listen only and the beltpacks’ channel lights are flashing until the <TALK> button is active. At that point the beltpack transmits full time and is in full duplex mode until user disables the <TALK> button again.
NOTE: Only ten full duplex beltpacks can work off a base station. Thus the number of full duplex beltpacks on that base must be reduce by the number of Push-to-TX beltpacks that could become full duplex if their users press the talk button.
For example, a base station has 6 full duplex beltpacks and 28 Push-to-TX beltpacks. Up to 4 of the 28 Push-to-TX beltpacks could go to full duplex at the same time without reaching system limitations. If 5 of the Push-to-TX were to become full duplex, for a total of 11 full duplex beltpacks, the system would go beyond its loading limit and all users will start to experience drop outs and delays in audio.
Figure 5-2
Two Ethernet connected base stations in two different
locations.
5-1
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