ST-888 ANI Decoder/Display UnitDESCRIPTIONThe ST-888 ANI Decoder/Display Unit is a key component of the SelectoneMobilecall ANI (Automatic Number Identification) System, which provides instantidentification of a transmitting mobile or station unit in a two way radio system.Applications include remote status monitoring and control systems, taxi systems, policeand public safety, courier services, and other fleet dispatch systems where positiveidentification of the mobile unit is desired to reduce channel time, to identify systemabusers, or to provide a permanent record of fleet activity. The popular SelectoneMobilecall ANI System is in daily use throughout the world in over 3,000 fleets with over75,000 mobile and portable radios.The ST-888 Decoder/Display is typically connected to the base radio at thedispatchers location to provide a visual display of the identity of eachtransmitting mobile unit. The ST-888 is compatible with the industry-standard DTMF(Touch-Tone®) signalling format. Therefore, each mobile unit must have a DTMF ANIsignalling option, or be equipped with the Selectone ST-804A ANI/ENI Encoder, or similarANI encoder module.The ST-888 is an attractive desk top console measuring 8.0' W x 4.3' D x1.7' H and operates on 13.6 VDC or 117 VAC with wall mount adapter. The ST-888includes a real-time clock and calendar, eight code memory recall stack, Centronicsparallel port for printer interface, and a RS-232C serial port for interface to aterminal, serial printer, or computer.
Plectron Tone Generator
ST-888OPERATING SPECIFICATIONSSPECIFICATIONDETAILOperating Voltage13.6 Vdc ±20%Operating Current150mAdc at all operating voltagesSignaling FormatDTMF (16 available characters)Sequence LengthANI or ENI prefix plus 1 to 8 ID digitsSignaling Input Level30mVrms to 2.5Vrms (composite)Twist Acceptance-8 to +4 dB if lesser tone is 30mVrmsNoise Tolerance-12dB referenced to lower amplitude toneDecode Bandwidth+2.3% of nominal DTMF frequencySignaling Input Impedance50K balancedDigit RateManual0.5 to 10 Digits/Sec. Tone on time5 Digits/Sec.4 to 10 Digits/Sec. Tone on time10 Digits/Sec.8 to 16 Digits/Sec. Tone on time15 Digits/Sec.11 to 20 Digits/Sec.
Tone on time20 Digits/Sec.14 to 22 Digits/Sec. Tone on timeSpeaker MuteForm C Relay energizes on receipt of DTMFAlarm OutputOpen collectorSerial PortStandard RSS 232 C configured for DCESerial Baud Rate1200 baud, 8 bits, 1 stop bit, no parityDimensions8.0'W x 4.3'D x 1.7'H(20.32cm x 10.92cm x 4.32cm)Specificationsand descriptions subject to change without notice© 1999, Communications Specialists, Inc.All rights reserved.Revision 4/14/99Last updated May 28, 2003.