Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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Interface Stack
Figure 1 on page 7 shows the stack for a channelized T3 interface. To configure a
channelized T3 interface, configure a T3 controller, followed by a T1 channel, and
then a fractional T1 channel. Finally, you must configure a High-Speed Data Link
Control (HDLC) data channel on the interface.
Figure 1: Stack for Channelized T3 Interface
For more information about the layers in a channelized T3 interface, see “Numbering
Scheme” on page 7.
NOTE: For a detailed description of interface types and specifiers, see Interface Types
and Specifiers in JUNOSe Command Reference Guide . For information about interfaces,
see Planning Your Network in JUNOSe System Basics Configuration Guide .
Numbering Scheme
This section describes how to identify each layer in a channelized T3 interface stack.
T3 Controllers
A T3 controller on a channelized T3 interface is identified using the slot/port format
where:
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slot —Number of the slot in which the line module resides in the chassis.
In ERX-7xx models, line module slots are numbered 2-6; slots 0 and 1 are
reserved for SRP modules. In ERX-14xx models, line module slots are numbered
0–5 and 8–13; slots 6 and 7 are reserved for SRP modules. In an ERX-310 router,
line module slots are numbered 0–2; slot 0 is reserved for the SRP module.
■
port —Number of the port on the I/O module. On a CT3/T3 12 I/O module, ports
are numbered 0–11.
For information about installing line modules and I/O modules in ERX routers, see
ERX Hardware Guide, Chapter 4, Installing Modules .
Platform Considerations
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Chapter 1: Configuring Channelized T3 Interfaces