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JunosE 11.3.x Physical Layer Configuration Guide
CT3/T3-F0 Line Modules and CT3/T3 12 I/O Modules
Exchanging Modules
Interface Stack
6
NOTE: The Juniper Networks E120 and E320 Broadband Services Routers
do not support configuration of channelized T3 interfaces.
For detailed information about the modules that support channelized T3 interfaces on
ERX7xx models, ERX14xx models, and the ERX310 router:
See ERX Module Guide, Table 1, Module Combinations for detailed module specifications.
See ERX Module Guide, Appendix A, Module Protocol Support for information about the
protocols and applications that channelized T3 modules support.
ERX7xx models, ERX14xx models, and the ERX310 router support the CT3/T3-F0 line
module and CT3/T3 12 I/O module. The CT3/T3-F0 line module and CT3/T3 12 I/O
module support both channelized and unchannelized T3 operation. You can configure
a mixture of channelized and unchannelized ports on these modules. For information
about configuring unchannelized T3 ports, see "Configuring Channelized T3 Interfaces"
on page 3.
ERX14xx models support up to 12 CT3/T3-F0 line modules and 12 CT3/T3 12 I/O modules,
ERX7xx models support up to 5 CT3/T3-F0 line modules and 5 CT3/T3 12 I/O modules,
and the ERX310 router supports up to two CT3/T3-F0 line modules and two CT3/T3 12
I/O modules. Each CT3/T3 12 I/O module has 12 physical T3 (DS3) ports. Each port uses
two SMB connectors: one for the transmit (TX) connection and one for the receive (RX)
connection.
CT3/T3-F0 line modules and CT3/T3 12 I/O modules support the following in channelized
mode:
28 asynchronous T1 (DS1) channels per T3 port
24 DS0 channels (64-Kbps) per T1 interface
166 DS0 channels per T3 port
If you replace a CT3/T3 line module and a CT3/T3 I/O module with a CT3/T3-F0 line
module and a CT3/T3 12 I/O module or vice versa, you must erase the configuration of
the existing modules. See the slot accept command in Managing Modules in the JunosE
System Basics Configuration Guide.
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.
Copyright © 2010, Juniper Networks, Inc.
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