The Wisconsin Interoperable System for Communications (WISCOM) is a shared system that first responders in communities across the state will use to communicate during a major disaster or large-scale incident. WISCOM supports up to four simultaneous conversation paths during an incident, dramatically increasing the current capacity available with statewide mutual aid channels and allowing responders from any area of the state to assist another community without losing communication capabilities.

2017 WISCOM Viability Study 

Having mission critical technical problems with WISCOM? Immediately call 608-2WISCOM (608-294-7266) for assistance.

WISCOM is a VHF (Very High Frequency), digital P25 (Project 25) radio network which currently supports over 23,000 radios. As of December 2016,  there are 116 sites on air. The most recent site map may be found here: WISCOM Site Map.

WISCOM was built to a 95/95 mobile coverage standard from the core sites, which means it covers 95% of the state 95% of the time using a 50 watt mobile radio with a quarter wave roof mounted antenna. DOT provided an update on WISCOM at the 10/10/14 SSMG meeting.


  • Leverages existing radio towers and other infrastructure, which lowers initial cost. 
  • Does not use proprietary technology so it will be flexible; it works with the wide variety of local systems currently operating in the state. 
  • Shares a statewide infrastructure that will result in long-term cost-savings for everyone. Communities are already spending millions of dollars on systems that do not allow interoperability. As communities replace their aging local systems, they will be able to leverage the state backbone, sharing infrastructure costs and avoiding costly duplication of equipment. Communities can then build out additional local coverage and capacity to meet their needs when they are ready. 

WISCOM Procedures & Plans

WISCOM Subscriber Units
As of November 12, 2018, the following radios have been certified for operations on WISCOM.

Portable radios:

  • EF Johnson 5100 series (5100 ES/51SL ES)
  • EF Johnson VP-5230 and VP-5430
  • EF Johnson VP-6230 and VP-6430
  • EF Johnson VP400 Series
  • EF Johnson VP600 Series
  • EF Johnson VP900 Series
  • Harris P5400 series (Scan or System)
  • Harris P5500 series (Scan or System)
  • Harris Unity series (XG75, XG100)
  • Harris XL-200 Portable Radio
  • Icom F9011 Portable
  • Kenwood NX-5200 and NX-5400 - NOTES ON PROGRAMMING
  • Kenwood TK5210 and TK5220 –  IMPORTANT INFORMATION
  • Kenwood TK5230 and TK5430 -  NOTES ON PROGRAMMING
  • Motorola XTS series (1500/2500/5000)
  • Motorola APX portables (APX1000, 4000, 6000, 7000,8000)
  • Relm KNG P150
  • Tait TP9100 series
  • Tait TP9400 series

Mobile/Base radios:

  • EF Johnson 5300 series (5300 ES/53SL ES)
  • EF Johnson VM400 Series
  • EF Johnson VM600 Series
  • EF Johnson VM900 Series
  • EF Johnson VM5000 Series
  • EF Johnson VM6000 Series
  • Harris M7100 series (Scan or System)
  • Harris M7300 series (Scan or System)
  • Harris Unity series (XG75, XG100)
  • Icom F9511 Mobile
  • Kenwood NX-5700  -  NOTES ON PROGRAMMING
  • Kenwood TK5710 and TK5720 – IMPORTANT INFORMATION
  • Kenwood TK5730  -  NOTES ON PROGRAMMING
  • Kenwood VM-5730 
  • Kenwood VM-6730
  • Motorola XTL series (1500/2500/5000)
  • Motorola APX mobiles (APX1500, 4500, 6500, 7500)
  • Relm KNG M150, B150Tait TM9100 series
  • Tait TM9400 series

Guidelines for new radio purchases:
New radios purchased with grant funds must meet the following grant standards. Note that some WISCOM eligible models (listed above) do not meet all of the grant standards requirements:

  • Compliant with current P25 standards Phase 1
  • Equipment must qualify for WISCOM operation through the Subscriber Certification Program
  • Capable of operating on 2 or more digital trunked systems
  • Capable of passing the adopted and current P25 “Enhanced VOCODER Methods of Measurement of Performance” specified in (Telecommunications Industry Standard) TIA-102.BABG
  • P25 digital trunking enabled
  • Provide 512 channel minimum capacity
  • Minimum capability of 128 control channels
  • Capable of Alphanumeric Display
  • VHF Portable Radios have 138-174 MHz band spread
  • VHF Mobile Radios installed with a Wideband antenna (139-169 MHz or better)
  • Programmed according to Statewide Mutual Aid Frequency Plan within the Statewide Communications Interoperability Plan (available for download here) with a minimum of 25 narrow banded statewide mutual aid channels.
  • Programmed with the appropriate WISCOM talk groups

Recommendations for new Radios:
Recommendations for new radio purchases, based on experience and technical experience:

  • Compliant and capable for P25 Phase 2 
  • Ability to program multiple trunked system talk groups and conventional frequencies in the same zone


Want to subscribe to WISCOM? 

Please email  for more information. 

Want to obtain system key and programming information for WISCOM?

Please email  for more information.

Want P25 Radio ID Plan information?                                                                                 

Try here or contact 

Having technical problems with WISCOM? 

Call 608-2WISCOM (608-294-7266).