BT2-R Repeater The BT2-4 is a narrowband repeater used in Monaco's D-500 Radio Alarm System to aid communications between transceivers and the central receiving equipment where terrain or some obstacle interferes with the radio signals. The BT2-R is located where its antenna provides a clear path with the central and the obstructed BT2s. It can be used with any four-tone BT2 or M-1. Target BT2 and zone ranges are programmed into the BT2-R by the user. The BT2-R repeats all interrogations, replies, alarms and troubles which include numbers in those ranges. A second BT2-R can be used in redundant mode to repeat messages for target BT2s or zones if the primary BT2-R does not. The BT2-R does not provide zone inputs, but does monitor and report its own ac fail, battery fault and enclosure tamper (optional) conditions. It also replies to D-500 supervisory interrogations. Repeats D-500 interrogations to target BT2s/M-1s and all messages from target BT2s/M-1s Provides capacity for up to eight groups of BT2s/M-1s A redundant BT2-R may be used as a backup to the primary BT2-R BT2-R number and target BT2 and zone ranges are entered on rotary switches and stored in a transferrable Data Module Communications between the BT2-R and the D- 500 are supervised by scheduled and manual interrogations Battery fault (low or disconnected battery or high charger output), ac fail and enclosure tamper (optional) conditions are reported with the BT2-R number, ac fail reporting may be inhibited LEDs identify BT2-R status Digital display shows programmed information and diagnostic test data; includes programmed diagnostic tests Provides 60-hour battery backup/charger 4 watts RF output power (Selected frequencies available at 2 watts RF output power)