Higher-Level Protocols; Platform Considerations; Cocx-F3 Line Modules And Associated I/O Modules; Chapter 2 Configuring T3 And E3 Interfaces - Juniper PHYSICAL LAYER - CONFIGURATION GUIDE V11.1.X Configuration Manual

For message strings that are unique to a particular message type, the line module
must receive another message of the same type containing this string in order to
retain the local copy of the string and reset the timer. For example, if the line module
receives a test signal message containing a generator string and does not receive
another test signal message within 10 seconds, it will erase the local copy of the
generator string.

Higher-Level Protocols

See ERX Module Guide, Appendix A, Module Protocol Support for information about
the higher-level protocols that T3 and E3 interfaces support.

Platform Considerations

You can configure unchannelized T3 and unchannelized E3 interfaces on the following
E Series Broadband Services Routers:
NOTE: The E120 and E320 Broadband Services Routers do not support configuration
of unchannelized T3/E3 interfaces.
For detailed information about the modules that support unchannelized T3/E3
interfaces on ERX7xx models, ERX14xx models, and the ERX310 router:

COCX-F3 Line Modules and Associated I/O Modules

ERX7xx models, ERX14xx models, and the ERX310 router support the COCX-F3
line modules and associated I/O modules.
ERX14xx models support up to twelve COCX-F3 line modules and twelve
corresponding I/O modules, 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 twelve physical
T3/E3 (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.
COCX-F3 line modules and associated I/O modules support the following:
ERX1440 router
ERX1410 router
ERX710 router
ERX705 router
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 unchannelized T3/E3 modules support.
Chapter 2: Configuring T3 and E3 Interfaces
Platform Considerations
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