Technical Appendix Specifications for the RADIO SYSTEM UPGRADE

G. Voice and signaling interfaces to communications networks and auxiliary radio equipmentshall be digital unless interfacing to existing or contractor-provided analog equipment.H. Interconnection of the central electronics to leased telephone lines or other media shall beaccomplished through standard 66-type punch-down blocks and bridging clips, to enabletechnicians to isolate each sub-system for troubleshooting.I. Audio output to the logging recorder shall not contain control tones. The sum of all noiseshall be 40dB below the average audio level.J. Voice truncation, between the dispatcher's operation of the PTT switch, and audio outputfrom a field radio unit, and between a radio unit keying the microphone and audio output atthe dispatcher position, shall not exceed 400 milliseconds.K. The system shall allow operating parameters, including those for paging, to be programmedor reconfigured from a remote location on the City’s LAN, using a password, throughEthernet equipped personal computer (PC).L. System must be sufficiently redundant that there is no single point of failure.M. System logging will be to a log file that automatically archives old logs based on file sizeand/or date. Log files shall be printable by a designated supervisor’s workstation. Log writeerrors shall result in a visual and audible alarm to the workstations. Contractors shalldescribe size constraints on log files and how they can be automatically archived.N. All base station interfaces shall utilize tone remote controls with standard tone keyingprotocols commonly in use by Motorola or Tyco. The workstations shall be capable ofoperation with the Contractor’s latest digital radio system offerings.Operational FeaturesEach proposed dispatch radio control shall be equipped with the following features:A. All workstations shall provide an alert tone generator with multiple tone combinations, andassociated momentary switch depiction for urgent messages.B. Failure of a hard disk drive shall not affect the operation of the system, its screens, or anyactive configuration files.C. Workstation channel icons shall be capable of displaying eight-character, user “aliases”derived from emergency button activation from field units and from PTT-ID. Up to 24aliases shall be stored in history for immediate access.D. Capability for full-duplex operation between dispatcher and radio units shall be provided,with dispatcher priority.E. A restricted channel-alerting marker (Code 33) tone shall be provided which willautomatically sends a tone (or digital equivalent) on any combination of channels at aprogrammable interval and duration during events requiring restricted channel use. Theinterval shall be adjustable from one second to ten seconds; the duration adjustable from 250milliseconds to two seconds; the frequency of the tone adjustable from 700 to 1,000 Hz.Enabling and disabling the tone shall be performed with a single-action from the screendisplay. A flashing icon or screen depiction shall indicate an enabled and active status. Thedispatcher or mobile/portable user shall immediately override and disable the tone duringCity of San Luis Obispo 34 Radio System Upgrade TECHNICAL APPENDIX