H - Electricity – 04 – M
Patent
H - Electricity
04
M
363/14, 354/233,
H04M 3/24 (2006.01) G08G 1/00 (2006.01) H04M 3/36 (2006.01)
Patent
CA 1039391
ABSTRACT OF THE DISCLOSURE A monitoring terminal used for the automatic collection of telephone traffic data such as for example the number and duration of calls on a given trunk or group of trunks, the num- ber of times and duration that all trunks or line finders were busy, or any other "event" occurring on a line that provides a signal proper for recording by the terminal. The terminal uti- lizes time division multiplexing to monitor traffic on up to 10240 input lines and converts the information in each group from parallel to serial form as 1024 serial 12 bit parallel words, records the event count data and usage time duration for each input line, and transmits accumulated event count and usage line data over a phone line as a serial message of 1024 groups of six characters. The terminal has up to ten parallel synchronously operating memory groups, each memory group containing an accumu- lating memory which counts the events as they occur and a passive memory which upon command receives data from the accumulating memory. Data in any accumulating memory or passive memory may be read out of the terminal on command from a remote supervising unit. Accumulation operation of the terminal is automatic, and data readout and subsequent clearing of the registers and coun- ters is controlled by the remote supervising unit. The condition of each line is examined continuously cyclically to determine the presence or absence of an event and the duration of such event. A multiple sampling technique is utilized to distinguish the pre- sence of an event from noise.
214320
Litzinger John E.
Werner Leroy H.
LandOfFree
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