Time-Of-Day Port Pinouts; Usb Port Pinouts - Cisco Network Convergence System 540 Hardware Installation Manual

Appendix
Table 15: Timing Port Pinouts
Waveform
Amplitude
Impedance
Pulse
Width
Rise Time

Time-of-Day Port Pinouts

This table summarizes the ToD/1-PPS port pinouts:
Table 16: RJ-45 ToD/1-PPS Port Pinouts
Pin
1
2
3
4
5
6
7
8

USB Port Pinouts

This following table summarizes the USB port pinouts:
Table 17: USB Port Pinouts
Pin
A1
10 MHz (Input and Output)
Input—Sine wave
Output—Square wave
Input— > 1.7 volt p-p(+8 to +10 dBm)
Output— > 2.4 volts TTL compatible
50 ohms
50% duty cycle
Input—AC coupled
Output—5 nanoseconds
Signal Name
–
–
1PPS_N
GND
GND
1PPS_P
TOD_N
TOD_P
Signal Name
Vcc
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
1PPS (Input and Output)
Input—Rectangular pulse
Output—Rectangular pulse
Input— > 2.4 volts TTL compatible
Output— > 2.4 volts TTL compatible
50 ohms
26 microseconds
40 nanoseconds
Direction
–
–
Output or Input
–
–
Output or Input
Output or Input
Output or Input
Description
+5 VDC
Time-of-Day Port Pinouts
Description
–
–
1PPS RS422 signal
–
–
1PPS RS422 signal
Time-of-Day character
Time-of-Day character
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