Srx5600 Alarm And Management Cable Specifications And Pinouts - Juniper SRX5600 Hardware Manual

Higher-order loss = 0.5 dB
Clock recovery module = 1 dB
The power margin (P ) is calculated as follows:
M
P = P – LL
M B
P = 13 dB – 2 km (1.0 dB/km) – 5 (0.5 dB) – 2 (0.5 dB) – 0.5 dB [HOL] – 1 dB [CRM]
M
P = 13 dB – 2 dB – 2.5 dB – 1 dB – 0.5 dB – 1 dB
M
P = 6 dB
M
The following sample calculation for an 8 km-long single-mode link with a power budget (P
the estimated values from
(8 km @ 0.5 dB/km, or 4 dB) and loss for seven connectors (0.5 dB per connector, or 3.5 dB). The power
margin (P ) is calculated as follows:
M
P = P – LL
M B
P = 13 dB – 8 km (0.5 dB/km) – 7 (0.5 dB)
M
P = 13 dB – 4 dB – 3.5 dB
M
P = 5.5 dB
M
In both examples, the calculated power margin is greater than zero, indicating that the link has sufficient
power for transmission and does not exceed the maximum receiver input power.
SRX5600 Alarm and Management Cable Specifications
and Pinouts
IN THIS SECTION
Alarm Relay Contact Wire Specifications for the SRX5600 Services Gateway | 183
Console Port Cable and Wire Specifications for the SRX5600 Services Gateway | 183
RJ-45 Connector Pinouts for the SRX5600 Services Gateway Routing Engine Ethernet Port | 183
RJ-45 Connector Pinouts for the SRX5600 Services Gateway Routing Engine Auxiliary and Console Ports | 184
Table 50 on page 181 to calculate link loss (LL) as the sum of fiber attenuation
182
) of 13 dB uses
B