(13 dBm) – (0.5 dBm [HOL]) – ((5) * (0.5 dBm)) – ((2) * (0.5 dBm)) – ((2 km) * (1.0 dBm/km)) – (1 dB
[CRM]) = P
M
13 dBm – 0.5 dBm – 2.5 dBm – 1 dBm – 2 dBm – 1 dBm = P
M
P
M
= 6 dBm
The calculated power margin is greater than zero, indicating that the link has sufficient power for
transmission. Also, the power margin value does not exceed the maximum receiver input power. Refer
to the specification for your receiver to find the maximum receiver input power.
EX4650 Management Cable Specifications and Pinouts
IN THIS SECTION
Console Port Connector Pinout Information | 71
RJ-45 Management Port Connector Pinout Information | 72
RJ-45 to DB-9 Serial Port Adapter Pinout Information | 73
QSFP+, QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information | 73
Console Port Connector Pinout Information
The console port on a Juniper Networks device is an RS-232 serial interface that uses an RJ-45 connector
to connect to a console management device. The default baud rate for the console port is 9600 baud.
Table 29 on page 72 provides the pinout information for the RJ-45 console connector.
NOTE: If your laptop or PC does not have a DB-9 male connector pin and you want to connect
your laptop or PC directly to a device, use a combination of the RJ-45 to DB-9 female adapter and
a USB to DB-9 male adapter. You must provide the USB to DB-9 male adapter.
71
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