VERSION 1.17 OF THE ICOM SOFTWARE FIXES A PTT HANG-UP PROBLEM THE HANG-UP OCCURRED WHEN CHANGING A FREQUENCY WHILE IN TRANSMIT ALSO INCREASED DATA TRANSFER SPEED WAS ADDED BETWEEN THE CONTROLLER AND THE RLC-ICM FOR THE RECORD: 1) COR FROM THE RLC-ICM IS ACTIVE LOW 2) PTT INTO THE RLC-ICM IS ACTIVE LOW 3) AUDIO OUTPUT FROM THE RLC-ICM IS DISCRIMINATOR AUDIO 4) TS-64 TONE UNITS NEED JUMPER JU-7 INSTALLED FOR CORRECT PL DETECTION 5) INITIALIZATION JUMPER IS PLACED BETWEEN R-T PINS INITIALIZATION IS THEN PERFORMED UPON POWER-UP 6) NORMAL OPERATION REQUIRES THIS JUMPER OUT OF LINE 7) 2 METERS DEFAULTS TO MODULE 1 8) 220 DEFAULTS TO MODULE 2 9) 440 DEFAULTS TO MODULE 3 10) MODULE 4 IS DISABLED 11) WHEN ENTERING A NEW FREQUENCY, THE MODULE GOES INTO RECEIVE ONLY MODE 12) CONFIGURATION CODE 85 PLACES THE MODULE IN TRANSMIT-RECEIVE ON 13) CONFIGURATION CODE 90 PLACES THE MODULE IN RECEIVE ONLY MODE, NO TX 14) CONFIGURATION CODE 95 PLACES THE MODULE INTO RECEIVE-TRANSMIT OFF MODE THIS UPDATE WILL NOT CHANGE ANY OF YOUR INTERFACE SETTINGS LINK COMMUNICATIONS, INC. TECHNICAL SUPPORT