REDCOM Radio Interface

REDCOM Radio Interface
Connecting REDCOM switching systems and military & commercial radios
Easy message-based setup
Allows back-to-back radio patches with VOX, COR & PTT
Security check for encrypted military radios
Suppresses repeater squelch tail noise burst
Three monitor speaker outputs
Supports multi-user dial-in monitoring via analog, digital & IP
• Front panel LED indications
• Standard interface compatible
with normal balanced/unbalanced remote radio electrical
• Remote Supervision Release
allows the switch software to
release the radio circuit on
detection of on-hook from the
phone network
Radio users gain access
to REDCOM system features
REDCOM’s Radio Interface provides a simple
and reliable connection between REDCOM
switching systems and two-way radio systems.
Radio users gain all the same benefits of a
REDCOM system normally available to station
users. The feature allows any phone in the
REDCOM system to dial out to a remote radio,
or allows a radio to dial directly into the system
and ring a phone, make an outside call, or call
another remote radio system.
Adjustable gain
REDCOM’s Radio Interface provides adjustable
gain to accommodate radio audio and long
cable lengths, enabling geographic distribution
between the radio base unit and the REDCOM
Multi-user dial-in monitoring
Several users can monitor radio traffic by dialing
in via analog telephone systems, digital (ISDN)
phones, or IP phones. This feature can also be
password controlled for enhanced security.
Input Gain
• The Radio Interface may be
adjusted to provide a 0 dBm
level (PCM) to the backplane
when the input is any level
between 100 mV rms and
2 V rms (+8.5 to –17 dBm0
at 600 Ω).
Supports VOX, COR & PTT calling
The Interface contains two circuits and supports
full two-way calling with Push To Talk (PTT),
Voice Operated Transmission (VOX) or Carrier
Operated Relay (COR). Each circuit can interface
with an HF (pulse) or UHF/VHF (DTMF) radio
for simplex or duplex operation. The Interface
allows direct, back-to-back radio patches with
both VOX and COR.
• Transmission in each direction is VOX
controlled, with built-in timing to facilitate
transmit/receive transitions.
• Operating parameters can be changed in the
field to accommodate specific radio system
• Parameters are stored in non-volatile RAM
for protection if the board is removed or
• Transmits a ring sound over the radio to the
remote user to notify of an incoming call
(call will not be billed until it is answered).
• On-board microprocessor controls the 2-way
VOX, call progress monitoring, and timing
operations without the use of specially
equipped phones.
• Auto answer is available on a port-by-port
basis and can answer on ring number 1–255. This is set by using the “ans_mode” command on the Radio Interface screen.
• PTT activation from REDCOM LCS or ISDN
CommandSet™ phones.
Radio Requirements
• Microphone Input: low
impedance 150 Ω (nominal
0.1–8 mV rms), or 600 Ω
(100 mV to 2 V).
Effectively suppresses
repeater squelch
REDCOM technology removes the annoyance
of repeater squelch tail noise found in analog
radios commonly in use with police, fire,
municipal and commercial/industrial communication networks.
Security check for encrypted radios
Interoperable with encrypted military radios,
REDCOM’s Radio Interface verifies that the
radio is secure before the voice transmission is
©2008 REDCOM Laboratories, Inc. REDCOM, the REDCOM logo, and TRANSip are registered trademarks and CommandSet is a trademark of REDCOM Laboratories, Inc. Subject to change without notice or obligation.
Talk to the communications experts at REDCOM
For more information about how REDCOM can create a reliable solution for you,
call us today at +1.585.924.6500, or e-mail
One Redcom Center, Victor, NY 14564-0995, U.S.A.
• Variable audio delay to
accommodate scanners and
secure preamble
Output Gain
• The output can be adjusted
to any level between 0.1 and
8 mV rms into a 150 Ω load,
or –16 to +9 dBm0 into 600 Ω
• Speaker Output: 50 mV to 3 V
rms into the Radio Interface’s
600 Ω input.
or higher
compatible RADIOS:
Below is a list of radios that
have been tested by REDCOM
for compatibility with the Radio
• SINCGARS (RT-15xx and
RT-17xx series, various
• Cobra MicroTalk
• Rockwell Collins AN/VRC-100
• Harris AN/PRC-150
• Harris AN/PRC-117F
• Harris RF5000
• Motorola MaxTrac 300
• Kenwood TK-805D