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Normal connections for original TRIMBLE NTP interface

The Test Traffic Measurement Service (TTM) was shut down on 1 July 2014. This information is available for historical reference.

Connections for "RIPE-NCC TTM GPS Interface".

Pin 1 of the connector is given in the picture below.

According to the EIA568 B specifications, the colours of the UTP cable are :

When this colour scheme is used, the connections are as follows for the "RIPE-NCC GPS interface".

Signal Description	Wire Color	Protocol	Palisade Connector	RJ45 or modular plug		NTP DB25 Interface
DC Power(+9 to +32 Volts DC)	Red	+9 to 32 V	Pin 1	Pin 8	brown	Pin 1
Port B: RS-422 / Receive -	Violet	TSIP RS422	Pin 2	Pin 1	white/orange	Pin 25
Port B: RS-422 / Receive +	Orange	TSIP RS422	Pin 3	Pin 2	orange	Pin 13
Port B: RS-422 / Transmit -	Brown	TSIP RS422	Pin 4	Pin 5	white/blue	Pin 11
Port B: RS-422 / Transmit +	Yellow	TSIP RS422	Pin 5	Pin 4	blue	Pin 23
Port A: RS-422 / Receive -	White	Event Input RS422	Pin 6 not used
Port A: RS-422 / Receive +	Grey	Event Input RS422	Pin 7 not used
Port A: RS-422 / Transmit -	Green	NMEA / TSIP RS422	Pin 8 not used
DC Ground	Black	Ground	Pin 9	Pin 7	white/brown	Pin 7
Port A: RS-422 / Transmit +	Blue	NMEA / TSIP RS422	Pin 10 not used
One PPS: Transmit +	Orange w/ White stripe	RS422	Pin 11	Pin 3	white/green	Pin 21
One PPS: Transmit -	Black w/ White stripe	RS422	Pin 12	Pin 6	green	Pin 9