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JUNOSe 11.1.x Physical Layer Configuration Guide
OCx/STMx/DS3-ATM Line Modules and 4xDs3 ATM I/O Modules
ERX7xx models, ERX14xx models, and the ERX310 router support the
OCx/STMx/DS3-ATM line modules and 4xDS3 ATM I/O modules.
ERX14xx models support up to twelve OCx/STMx/DS3-ATM line modules and twelve
4xDS3 ATM I/O modules, the ERX7xx models support up to five of these line modules
and five corresponding I/O modules, and the ERX310 router supports up to two of
these line modules and two corresponding I/O modules. There are four physical T3
(DS3) ports per I/O module. Each port uses two BNC connectors: one for the transmit
(TX) connection and one for the receive (RX) connection.
OCx/STMx/DS3-ATM line modules pair with 4xDS3 ATM I/O modules to support the
following:
CT3/T3-F0 Line Modules and CT3/T3 12 I/O Modules
ERX7xx models, ERX14xx models, and the ERX310 Broadband Services Router
support the CT3/T3-F0 line modules and CT3/T3 12 I/O modules.
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. To configure these modules to support
unchannelized T3 operation, issue no "channelized" on page 51 . (See "Configuration
Tasks" on page 51 .) For information about configuring channelized T3 ports, see
"Configuring T3 and E3 Interfaces" on page 45.
ERX14xx models support up to twelve CT3/T3-F0 line modules and twelve CT3/T3
12 I/O modules, ERX7xx models support up to five of these line modules and five
corresponding I/O modules, and the ERX310 Broadband Services Router supports
up to two of these line modules and two corresponding I/O modules. There are twelve
physical T3 (DS3) ports per I/O module. Each port uses two SMB connectors: one for
the transmit (TX) connection and one for the receive (RX) connection.
48
Platform Considerations
Clocking
Redundancy
Frame Relay logical interface support
Unique IP interface support for each PPP or Frame Relay PVC interface
HDLC
Fractional T3 (T3 only)
Line speeds of 45 Mbps (T3) and 34 Mbps (E3)
Clocking
Redundancy
Frame Relay logical interface support
Unique IP interface support for each PPP or Frame Relay PVC interface
Line speeds of 45 Mbps
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