Juniper J-series Services Router J2350 Hardware Manual page 124

JUNOS Software with Enhanced Services Hardware Guide
Figure 56: Connecting to the Console Port on J2320 and J2350 Routers
Figure 57: Connecting to the Console Port on the J4350 and J6350 Routers
Connecting to the CLI Remotely
You can connect to the CLI from a remote location through two dial-up modems: a
modem that is connected to the console port on the Services Router and a second
modem connected to a remote management device. The modem connection allows
you to remotely perform the same console operations you can perform locally.
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Connecting to a Services Router