Cisco ASR-920-20SZ-M - GPS Port Pinouts; Time-Of-Day Port Pinouts

DescriptionDirectionSignal
Name
Pin
Not used——7
Not used——8
GPS Port Pinouts
The following table summarizes the GPS port pinouts.
The 10 Mhz and 1 PPS interfaces can be configured as input or output using Cisco IOS CLI commands. For
more information, see the Cisco ASR 920 Series Aggregation Services Router Configuration Guide.
Note
Table 8: GPS Port Pinout
1PPS (input and output)10 Mhz (input and output)
Input—Pulse shape
Output—Pulse shape
Input—Sine wave
Output—Sine or square wave
Waveform
Input— > 2.4 volts TTL compatible
Output— > 2.4 volts TTL compatible
Input— > 1.7 volt p-p (+8 to +10 dBm)
Output— > 2.4 volts TTL compatible
Amplitude
50 ohms50 ohmsImpedance
26 microseconds50% duty cyclePulse
Width
40 nanosecondsInput—AC coupled
Output—5 nanoseconds
Rise Time
Time-of-Day Port Pinouts
The following table summarizes the ToD/1-PPS port pinouts.
Table 9: RJ-45 1PPS/ToD Port Pinouts
DescriptionDirectionSignal
Name
Pin
Do Not ConnectOutputRESERVED1
Do Not ConnectInputRESERVED2
1PPS RS422 signalOutput or
Input
1PPS_N3
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
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Troubleshooting Aids
GPS Port Pinouts