AddPac AP-LMR2000 Manual page 7

Hardware Specification
AP-LMR2000 LMR Gateway
Example : E&M Interface for Radio Interworking Example : E&M Interface for Radio Interworking
Lead Name
E (Ear or Earth)
M (Mouth or Magnet)
SG (Signal Ground) SG (Signal Ground)
SB (Signal Battery)
Two-Wire Mode
T1/R1 (Tip 1/Ring 1) T1/R1 (Tip-1/Ring-1)
Four-Wire Mode
T/R (Tip/Ring)
T1/R1 (Tip-1/Ring-1)
p
Pin Description
Pin 7 Signal wire asserted by the router toward the connected device. Typically
mapped to the push-to-talk (PTT) lead on the radio.
Pin 2 Signal wire asserted by the router toward the connected device. Typically
mapped to the push-to-talk (PTT) lead on the radio.
Pin 8 Pin 8 Used on E&M signaling Types II, III, and IV. Used on E&M signaling Types II, III, and IV.
Pin 1 Used on E&M signaling Types II, III, and IV.
Pin 4 5 Pin 4,5 In two-wire operation the T1/R1 leads carry the full-duplex audio path In two wire operation, the T1/R1 leads carry the full duplex audio path.
Pin6,3 In a four-wire operation configuration, this pair of leads
carries the audio in from the radio to the router and would
typically be connected to the line out or speaker of the radio. t picall be connected to the line o t or speaker of the radio
Pin5,4 In a four-wire operation configuration, this pair of leads
carries the audio out from the router to the radio and would
normally be connected to the line in or microphone on the
radio radio
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