Nixon & Vanderhye
Self correction of PST simulcast system timing
 Arrangements are disclosed for maintaining time synchronization of simulcast radio frequency communications system transmissions. A circuit continually instructs a modem to use the common system clocking signal, and modems are retrained whenever a channel is taken out of service because of a test call failure. 
Ericsson Inc.
H H
H04W H04H
additional inventional
Thomas A. George D.
Brown Rose, Jr.