Cisco Systems ASR 901 10G manual GPS Port Pinouts, 10 Mhz

Appendix B Cable Specifications

GPS Port Pinouts

Table B-7	Time of Day RJ-45 Interface Pinout
Pin	Signal Name	Direction	Description
3			Not connected
4	Ground
5	Ground
6			Not connected
7	TOD_N	Output/Input	Time of Day RS422 differential input
			or output
8	TOD_P	Output/Input	Time of Day RS422 differential input
			or output

GPS Port Pinouts

The Cisco ASR 901 10G router has a 10Mhz and a 1PPS GPS port that allow you to configure input or output clocking with a GPS device. Table B-8summarizes the pinouts for the 10Mhz and 1PPS interfaces.

Note For pinouts related to ToD and 1PPS using the BITS interface, see Console Port Signals and Pinouts.

Table B-8	GPS Port Pinouts for the Cisco ASR 901 10G router
		10 Mhz	1PPS
Waveform		Input—Sine wave	Input—Pulse shape
		Output—Square wave	Output—Pulse shape
Amplitude		Input— > 1.7 volt p-p	Input— > 2.4 volts TTL
		(+8 to +10 dBm)	compatible
		Output— > 2.4 volts TTL	Output— > 2.4 volts TTL
		compatible	compatible
Impedance		50 ohms	50 ohms
Pulse Width		50% duty cycle	26 microseconds
Rise Time		Input—AC coupled	40 nanoseconds
		Output—5 nanoseconds

The 1PPS interface type is Series 1.0 / 2.3, 50 ohms.

For instructions on how to configure the 10 Mhz and 1PPSs ports, see the Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.

Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide

OL-28105-02 B-7