Marconi CRM115E User Guide
CM 115 E
VOICE/DATA ENCRYPTION
EQUIPMENT
The CM115E equipment is a digital
ciphering device that can be configured for voice or data applications.It
can be used in conjunction with HF,
VHF and UHF radios providing either narrow or wide band channels.
The voice analogue signal is internally converted to a digital signal, encrypted through a high-grade security algorithm, modulated and sent to
the external radios for transmission.
The crypto algorithm is a proprietary Marconi Selenia Communications algorithm that can be customised by the end user.
Plain mode is also available. The operator can select the working mode
as well as the key variable. Rapid
erasure of all keys is possible.
The equipment can store up to 60 ke y
variables. Key loading is performed by
means of portable electronic transfer
devices (Tape Reader,Fill Gun,etc.)
The CM115E can be provided with
the following Ancillary Units:
• CP1144/D,Remote Control Unit
• MT1133/D,mounting slide
The equipment operates in the fol-
lowing modes:
Narrow Band
Voice Mode:
• Headphone interface (Voice in/out
(0 dBm/600 Ohm),PTT)
• Analogue-to-Digital Voice conversion (LPC10 Vocoder at 2400 bps)
• Digital Encryption
• Analogue modulation (Modem set
in voice mode)
• Radio interface
Data Mode:
• DTE interface (electrical interface
V.10)
• Synchronous encryption and transmission at 300,600,1200,2400 bps
• Analogue modulation (Modem set
in data mode)
• Radio interface
Wide Band
Voice Mode:
• Headphone interface (Voice in/out
(0 dBm/600 Ohm),PTT)
• Analogue-to-Digital Voice conversion (CVSDM 16 kbps)
• Digital Encryption
• Radio interface (BB / Diphase
modulation)
Data Mode:
• DTE interface (electrical interface
V.10)
• Synchronous encryption and transmission at 8 or 16 kbps)
• Half-duplex/Full-duplex Transmission Mode
The CM115E also incorporates the
following features:
• CIK (Crypto Ignition Key)
• Anti-tampering mechanisms
• Battery for key holding
• Crypto alarms
• Local (Keyboard & Display) and
remote control (RCU)
• BITE
The chassis is a lightweight aluminium alloy casting composed of three
sub-assemblies:
• Front panel
• Main chassis
• Rear panel
The equipment is based on modular
assembly allowing easy module substitution and maintenance.
CM 115 E
VOICE/DATA ENCRYPTION EQUIPMENT
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