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 routers:
■
ERX-1440 router
■
ERX-1410 router
■
ERX-710 router
■
ERX-705 router
■
ERX-310 router
NOTE:
The E120 router and the E320 router do not support configuration of
unchannelized T3/E3 interfaces.
For detailed information about the modules that support unchannelized T3/E3
interfaces on ERX-7xx models, ERX-14xx models, and the ERX-310 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.
COCX-F3 Line Modules and Associated I/O Modules
ERX-7xx models, ERX-14xx models, and the ERX-310 router support the COCX-F3
line modules and associated I/O modules.
ERX-14xx models support up to twelve COCX-F3 line modules and twelve
corresponding I/O modules, ERX-7xx models support up to five of these line modules
and five corresponding I/O modules, and the ERX-310 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:
Platform Considerations
■
47
Chapter 2: Configuring T3 and E3 Interfaces
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