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2. PTP-SYNC interface description
Pinouts
The pinouts of the GPS/SYNC IN port of the PTP-SYNC unit are as follows:
Pin no.
Signal name
Pin 1
12VGPS
Pin 2
GND
Pin 3
GPS_1PPSA
Pin 4
GPS_RXDA
Pin 5
GPS_RXDB
Pin 6
GPS_1PPSB
Pin 7
GPS_TXDA
Pin 8
GPS_TXDB
NOTE
The GPS_1PPS, GPS_RXD and GPS_TXD signals conform to International
Telecommunication Union (ITU) recommendation V.11 (RS422).
RJ45 connector
This diagram shows how the pin numbers of the GPS/SYNC IN port correspond to the
RJ45 connector color codes (with T568B color coding):
phn-1613_008v000 (Jun 2011)
Signal description
12 V output to GPS receiver module, 250 mA max
Ground
1 Hz pulse input
GPS receive data
GPS receive data
1 Hz pulse input
GPS transmit data
GPS transmit data
PTP-SYNC Installation Guide
Page 10
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