Designed and optimized for use with personal protective equipment.
Rapidly deployable communications for incidents including:
- Mass Casualty
Includes Portable Repeater & Radios, Wireless Amplified Speaker & Headsets.
Additional components include Voice Projection Unit, Land Mobile Radio – Remote Key Switch & RF Transmit Indicator.
Intra-Team Wireless Intercom (Hands Free, Full Duplex)
–Simultaneous, two-way voice communications between NCOIC, support personnel and down-range members of entry team
Level “A” & “B”, MOPP 1-4, SCBA, PAPRs & EOD9 PPE Compatibility
Low Power, Portable Radios and Repeater
— Permits operation of multiple teams in close proximity
Bridge intra-team communications to two-way Land Mobile Radio (i.e. XTS-5000, MBITR, PRC – 117)
— For communications reach-back & command situational awareness
HERO Safe Emissions
— Will not affect EMI & RFI sensitive devices
Battery Operated Portable Repeater and Radios
— Potable Radios (6 hrs) and Repeater (10 hrs) will operate for full duty cycle
Explosive Ordnance Disposal (EOD)
Hazardous Material Response (WMD-CST/Haz-Mat)
Medical Response (CERF-P/VIPER/NMRT)
The DWIS (Digital Wireless Intercom System) is intra-team wireless intercom that is compatible with PPE/Level “A” and “B”. It is an invaluable communications tool for explosive ordnance disposal, medical & haz-mat response teams.
Primary System Components
Accessories (For Team Support Functions)
Literature & Briefings
The following briefings and literature on the DWIS medical and EOD intra-team wireless intercom are available for download:
- DWIS – Chem/Bio (CBRNe) Wireless Intercom – 1.87 MB
- DWIS – Explosive Ordnance Disposal (EOD) Wireless Intercom – 1.47 MB
|NUMBER OF PORTABLES SUPPORTED:||Up to six.|
|OPERATING FREQUENCY RANGE:||2400 TO 2483 MHz|
|RF CHANNELS:||11 pre-programmed channels, 2403.04 through 2479.84 Mhz on 7.68 MHz increments.
5 Non-Overlapping Channels on 15.36 MHz increments;
3 Non-Overlapping Channels on 23.04 MHz increments;
320 kHz step resolution.
|ADJACENT CHANNEL REJECTION:||60 dB minimum.|
|TRANSMITTER POWER:||AIU: 100 mw (+20 dBm);
ME: 50 mw (+ 17 dBm);
100, 50 and 25 mw available, not a field selection
|RECEIVER SENSITIVITY:||-95 dBm, for 10-5 BER|
|FREQUENCY STABILITY:||±7 PPM|
|MODULATION:||Direct Sequence Spread Spectrum (DSSS), BPSK
10.24 MCPS chipping rate;
341.333 KBPS data rate;
chip to bit ratio = 30.
|MULTIPATH DELAY TOLERANCE:||440 nanoseconds|
|MULTIPLE ACCESS METHOD:||TDMA; 1 master packet time slot, 6 slave packet time slots; cycle time 5.25 milliseconds, controlled by master;
42 PCM frames per TDMA cycle;
5.25 milliseconds end to end delay (10.5 milliseconds round trip);
Base to remote message duration: 679.7 microseconds;
Remote to base message duration: 656.3 microseconds.
|TRANSMISSION VOICE BAND AUDIO:||300 Hz – 3 kHz bandwidth;
4 bit micro-law ADPCM codec
|HEADSET INTERFACE:||Earpiece output: 8 ohm (min); volume adjustable up to 1 Watt RMS;
Microphone inputs: 8 ohm dynamic or electret.
|AUXILIARY I/O:||Transmit side (10K nominal pull-up to + 5V);
Receive side (1K nominal source/sink resistance);
4-bit parallel full duplex data, update rate 10 Hz, min.
Switch closure signifies logic “1”, +5 V signifies logic “1; 0 V signifies logic “0”.
Defaults to logic “0” at power up, or with loss of signal. Exmute signal; logic “1” signifies a valid received signal
and AUX data is present.
|Each packet, whether master or slave, has the same basic structure: guard time, followed by sync (S Field), followed by data (D Field).
S Field length: 168 bits.
D Field length: 192 bits.
|PORTABLE (ME) POWER DRAIN:||Receiving: 215 ma;
Transmitting: 350 ma;
Average: 235 ma.
|PORTABLE BATTERY OPTIONS:||Lithium ion rechargeable battery pack,
NiMH rechargeable battery pack,
8 each “AA” alkaline cells.
|PORTABLE BATTERY LIFE:||8 hours for “AA” alkaline cells, 12 hours for Li battery pack, at normal duty cycle|
|DIMENSIONS:||AIU with SLA battery and charger: 13.75 x 12 x 3.5″ (34.95 x 30.5 x 8.9 cm).
ME: 4 x 9 x 1″ (10.2 x 22.9 x 2.6 cm), with batteries.
|WEIGHT:||AIU with SLA battery and charger: 7.3 lb (3.3 Kg).
ME with batteries: 1.6 lb (0.75 Kg).
Audio and Video
Wired/Wireless Intercom from U.S. Army Chemical Munitions Demilitarization Facility