Chicago Police DepartmentSpecial Order S03-01-04
Radio Identification Numbers
Issue Date:25 October 2011Effective Date:25 October 2011
Rescinds:Version dated 26 June 2009 and S03-01-05
Index Category:Field Operations
I.Purpose
This directive:
  • A.establishes radio call identification numbers for Department member duty assignments.
  • B.identifies Department protocol for the issuance, modification, or termination of radio identification numbers.
  • C.assigns primary radio frequencies for each unit and duty assignment.
II.General Information
The term "radio call number" is frequently used interchangeably with “beat number” and “call number.” These terms refer to both how calls for services are dispatched by the Office of Emergency Management and Communications (OEMC) and how the Department identifies tour-of-duty assignments for personnel. In a very fundamental way, these identifiers are the mechanism by which the Department delivers services to the public. These same identifiers are also used as the basis for generating Department statistics, crime analyses, and managerial reports.
Today there is an electronic interdependence between multiple applications within the Department and OEMC. No longer can the Department simply create new radio identification numbers by issuing paper-based Department directives. Each newly authorized radio identification number requires the synchronization of Department electronic applications, established managerial reports, and coordination with OEMC to ensure there is no duplication or confusion due to the introduction of new or modified radio identifiers.
The official radio identification numbers and primary radio communication frequencies are posted and maintained on the Department’s intranet site.
III.Responsibilities
  • A.All unit commanding officers will ensure that their units have a sufficient number of radio identification numbers to successfully fulfill their mission. Unit commanding officers requesting to add, modify, or delete these identifiers, or to be assigned to a different primary radio frequency, will submit a written report through their chain of command to the attention of the Director, Research and Development Division.
  • B.The Research and Development Division will maintain the radio identification table and liaison with the OEMC, Public Safety Information Technology (PSIT), and other Department units as necessary to perform this responsibility.

    (Items indicated by italcs/double underline were added or revised on 25 October 2011.)
Authenticated by: RMJ
Garry F. McCarthy
Superintendent of Police
11-148 PMD