IDAS™ System Bridges the Gap Between Analog and Digital

IDAS is Icom's digital land mobile radio system using the NXDN™ common air interface. IDAS offers a complete system of handheld radios, mobile radios, repeaters, network interface/trunking controller, remote communicator and various accessories. IDAS is a complete digital solution that system owners and managers can grow into as their own time and budgets allow.

IDAS™ Products

IDAS™ System Features

  • Spectrum efficiency
  • Audio quality and coverage
  • Secure conversation
  • IDAS trunking
  • Flexible IP network
  • Flexible migration path

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IDAS™ System Benefits and Cost Comparisons

IDAS has useful calling features including selective calling, status message, radio, stun/kill/revive and GPS position reporting, etc. The IDAS system is ideal for business and industry users who are thinking to migrate to a digital system and hence to future mandated narrow channel spacing.

IDAS™ Conventional IP Network

An IDAS conventional IP network can extend your communication coverage. It lets you connect dispersed sites and allows you to communicate like a single site.  With an IDAS conventional IP network system, it is possible to have radio communications all the way from the basement to the top floor, all in stable digital audio. Already deployed LAN cables can be used in an in-building solution.

IDAS™ Multi-Site Conventional Systems

Multi-site conventional systems are possible with IDAS LINQ. Choose from the following configurations: LINQ™REPEAT, LINQ™REPEAT+, LINQ™VOTE, and LINQ™VOTE+.

LINQ Repeat

LINQ Repeat – multicast repeaters
Two or more conventional repeater connect via an IP network to create a multicast system that expands the coverage beyond a single repeater. In this case, the mobile subscriber radio transmits its uplink to the green repeater. The green repeater transmits the downlink on its own frequency while sending the signal to the orange and blue repeaters over IP. Those repeaters transmit their downlink on their unique frequencies thus ensuring the signal reaches all subscriber radios in the system.

LINQ Repeat+

LINQ Repeat+ – multicast repeaters with subscriber voting
An optional configuration of LINQ Repeat with the added function of subscriber voting and signal beaconing. In this case, the mobile subscriber radio and repeaters function just as the LINQ Repeat system would where a mobile subscriber radio passes traffic through a repeater to other subscribers in the system. In the background, subscriber voting and beaconing enable the mobile subscriber to listen for the beacon from each repeater to determine which has the strongest signal. Once determined, the mobile subscriber radio switches to that channel for traffic uplink/downlink transmissions. The mobile subscriber radio ignores the downlinks from other repeaters while continuing to listen for the beacons.


LINQ Vote – single repeater with system receive voting
One transmitting repeater and two or more receive-only repeaters (voting receivers) make up LINQ Vote. LINQ Vote is useful when mobile or portable radio uplinks cannot reach back to the transmitter/repeater, but the transmitter downlink can reach the desired coverage area. In this case, there are two voting receivers and the mobile subscriber radio uplink signals. The voting receivers send the signals over IP to the transmitter and selects the strongest signal to transmit in the downlink.

LINQ Vote+

LINQ Vote+ – multicast repeaters with system receive voting and subscriber voting
This system has at least two transmitters and two voting receivers with the addition of subscriber voting and beaconing. In this case, there are two transmitters and three receivers. Two of the receivers sense the mobile subscriber radio uplink signal which they send over IP to the two transmitters. Each transmitter selects the strongest signal to transmit as downlink. In the background, the mobile subscriber radio listens for the beacon to select the transmitter with the strongest downlink as its uplink channel.

LINQ Simulcast

LINQ Simulcast – simulcast repeaters with signal comparator voting
Two or more repeaters operate on the same downlink and uplink frequency pair make up a simulcast system. No system voting or subscriber voting is necessary. In this case, the mobile subscriber radio sends traffic over a common uplink frequency to any repeater within range. Each repeater sends its uplink traffic to the central comparator to select the strongest signal. With the aid of GPS and NTP timing synchronization, the comparator sends the traffic signal and timing information to each transmitter for downlink at a specific time to ensure good performance in the overlap areas.

Download LINQ™ Overview >

IDAS™ Multi-Site Trunking

IDAS MultiTrunk extends Icom's single site trunking system to multiple sites. Although IDAS MultiTrunk builds on the technology of IDAS Multi-site Conventional, it is a huge leap in capability. With IDAS MultiTrunk the advantages of trunking are enabled across many sites separated by great distances for operations that are large and geographically dispersed.

IDAS™ multi-site operation has now expanded to trunking. Use MultiTrunk to interconnect IDAS trunking sites, creating a large roaming coverage area. Use IP to transport radio traffic between sites adjacent to each other or from around the county.

Cut IP connection costs to a minimum. MultiTrunk compresses voice and data payload to a mere 13kbps, plus just a little bit more for administrative payload between trunking sites. MultiTrunk knows where the subscriber radios are and uses that knowledge to transmit only to those sites wtih target subscriber radios in the area.

IDAS MultiTrunk is a feature-rich, scalable solution that offers the industry's best value. Contact Icom today or visit your authorized Icom dealer.

  • Scalable from 1 channel to 30 channels per site, up to 16 sites
  • Effective operations with all channels used to transmit voice or data payload, priority monitoring for emergency interrupt, and polite roaming while conversations are occurring
  • All the features of a digital radio, like text, GPS and group/individual calls available in multi-site trunking

Digital/Analog Mixed Mode Operation

The IDAS radio can receive both analog mode and digital mode signals on a single channel. You can partially introduce the IDAS radios, while using the existing analog radios in a system. The IDAS system allows you to scale migration to narrow band digital at your own pace and need, while running your existing analog system. It is a cost efficient way to obtain the next generation two-way radio technology and protect your current system investment.

Peer-to-Peer Communication with FDMA

When compared to a TDMA (Time Division Multiple Access) 6.25 equivalent system, the FDMA (Frequency Division Multiple Access) enables "peer to peer" communication between radios in 6.25kHz digital mode. It ensues communication with no reduction in channel capacity, even if a repeater site is not available, or goes down.

Spectrum Efficiency

As explained, the IDAS system allows you to meet US FCC narrow banding requirements, and provides a solution to overcrowded airwaves.

Digital Signal Advantage

When comparing digital with analog FM, the audio quality of analog FM gradually deteriorates with static noise as the distance increases. On the other hand, the digital audio provides noise-less, stable audio for longer until the fringes of the communication range.

Secure Communication

When secure communication is required, the IDAS system provides a digital voice scrambler using a 15-bit key (about 32,000 keys) for encryption as standard. This is added security to the digital modulation/demodulation.

Selective Call, Group Call and Talk Group ID

The IDAS system allows you to call individual or group users. IDAS radios automatically send their own ID number when the PTT button is held down. IDAS radios memorize up to  500 of both individual/group ID is displayed on the LCD while receiving a message allowing you to identify who is calling.

Talk Back Function and Call Mode Selection

When the talk back function is enabled, the IDAS radio automatically selects the received talkgroup or individual ID to reply to the received call, while the talk back timer remains. After the talk back timer is exceeded, the IDAS radios will set to an initial call mode depending on programming which is either talkgroup or individual call or retain the previous user call mode selection.

Digital voice Scrambler

When secure communication is required, the IDAS system provides a digital voice scrambler using a 15-bit key (about 32,000 codes) as standard. This is added security to the digital modulation/demodulation.

Emergency Call Function

When the emergency button is pushed, the emergency signal will be automatically sent to the dispatcher or another radio. Other emergency features are a man down feature and a lone worker function, available for automated emergency calls (in digital and analog modes). A remote radio monitor function allows the dispatcher to turn on the PTT button from a remote location and transmit anything the microphone hears for a preprogrammed time period.

Status Message

You can set up to 100 conditions such as "on duty," "at lunch" or "in route" and send your status to another unit or the dispatch. Also, you can request another unit to send their status and receive it.

GPS Position Reporting

When used with the GPS speaker microphone, HM-170GP, for the handheld radio or an external GPS receiver for the mobile radio, the IDAS radio can send the current position information to another unit or the dispatch. Simultaneous status message and GPS data can also be sent. When connected to a PC installed with a mapping software application, the dispatcher will know the real-time activity of the fleet members.

Radio Stun, Kill and Revive

The radio kill functions disable a lost or stolen radio over the air, eliminating security threats from undesired listeners. When the radio receives the stun command, all functions will be locked out until the revive command is received or the user password is entered. The IDAS radio can also send radio stun, kill and revive commands.

Ran (Radio Access Number) for Digital Code Squelch

The RAN code is the digital equivalent of CTCSS for accessing an IDAS repeater or digital code squelch function.

Short Data Message Capability

Short data messages of up to 12 characters may be sent and received between IDAS radios or from the remote communicator.

Up to 16 IDAS Repeaters Connection Over IP Network

With the optional UC-FR5000, up to 16 IDAS repeaters can be interlinked with each other. An IDAS terminal radio user can communicate with other IDAS terminal radio users belonging to the interlinked repeater sites and/or a virtual dispatch station on the network.

Low Bandwidth Requirement

By using the AMBE+2™ vocoder compression, an IDAS conventional IP network requires only about 13kbps bandwidth per one voice path in theory. It means a DSL class line is sufficient for the IDAS conventional IP network. The IDAS conventional IP network. The IDAS conventional network system requires only one fixed IP address in a group of networked repeaters. Other repeater sites can work with dynamically allocated IP addresses when the IP manager/client mode is enabled through some restrictions may still be applicable.

Integrated System for Clean and Simple Installation

Icom has made it simple and easy to introduce and install an IDAS conventional IP network system requires only the UC-FR5000 network controller which can be installed into the IC-FR5000 series repeater - no control server and no extra rack space is required. In addition, the repeater and network controller settings can be remotely maintained and monitored over an IP connected PC.

RC-FS10 Remote Communicator

The remote communicator creates an IP-based virtual radio on a PC and works as a simple dispatch. IDAS communication features can be used with the remote communicator software. UP to 8 target IDAS repeater sites * can be programmable in the software. Eight remote communicators can connect to a single repeater

*The RC-FS10 software can transmit one voice path at a time. One CT-24 is required for receiving an IDAS repeater site and up to 8 repeater sites can be monitored simultaneously with 8 CT-24s.

Other Features

  • Radio check function allows you to verify if another radio is within the communication range
  • Call log displays the received call history
  • Call alert function notifies receiving party that a call is coming with a beep sound and blinking icon
  • Base station operation for repeater
  • Late entry: IDAS radio can decode the received ID and show group ID, unit ID or alias name on the display even when turned on during a conversation.