Juniper CTP151 Platform, Hardware Manual, Page: 23 / 104

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CTP151 T1/E1 Interface Module
The Juniper Networks CTP151 Circuit to Packet platform optionally includes a replaceable CTP150-IM-T1E1
interface module that can be paired with another module of the same type or a serial interface module.
The four-port T1/E1 interface module supports individual cabling for each port. The CTP151 ports have
T1/E1 ports for RJ-48 connectors (see Figure 7 on page 12 ). The highest-numbered port (labeled 3) is on
the left, and the lowest-numbered port (labeled 0) is at the right, with the CLK port still farther to the right.
Figure 7: CTP151 T1/E1 Interface Module
g100917
1 2 3
3
—
1
—
STATUS LED Four T1/E1 ports
2
—
One clock reference port
The software-selectable T1/E1 interfaces for the module are T1, E1, fractional T1, and fractional E1. CSU
options, encoding, and encapsulation are also software-selectable.
The module also includes an external clock reference port for an RJ-48 connector.
NOTE: The external clock reference port must be used only on the module in slot 0, the left-most
slot on the front of the CTP151 chassis. For information about the CTP151 modules slot
numbering, see “CTP151 Modules Slot and Port Numbering” on page 57 .
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