Figure 4: CTP150 Serial Multiservice Interface Module
CLK
1
0
3
2
STATUS
g004483
HD-26 26-pin
connectors
Clock
connector
The software-selectable interfaces for the module on all ports are RS-232/V.24, EIA530/X.21, EIA530A,
V.35, and IRIG. Software-selectable rates range from 50 bps to 12.228 Mbps. On ports 0 and 2 there are
also options for 4Khz (4WTO) analog, or high quality analog.
The module also includes an external clock reference port for an HD-26 connector. Note that only one
external clock reference is required even if there are two interface modules, serial or T1/E1.
On the CLK port, differential clock signals are output on the pins 4 and 17 of the HD-26 connector. When
an EIA-530A DCE-F serial cable (CTP150-CBL-DB25-DCE-F) is connected to the CLK port, the TT pins
24 and 11 of the DB25 connector output clock signals. If you configure a 32 kHz reference output, an
RS-422 32 kHz clock signal is generated on the pins. Even if you disable the 32 kHz reference output and
configure an external clock reference, the module expects an RS-422 clock input (of the configured
frequency) on the same pins.
NOTE: The external clock reference port must be the one in module slot 0, the left-most slot in
the front of the CTP150 chassis.
RELATED DOCUMENTATION
CTP150 Serial Interface Module | 7
Serial Multiservice Interface Module Overview
CTP150 Interface Module HD-26 Connector Cable Pinouts | 27
CTP150 T1/E1 Interface Module
The Juniper Networks CTP150 Circuit to Packet platform optionally includes a replaceable
CTP150-IM-4P-T1E1 interface module that can be paired with another module of the same type or a serial
interface module.
9
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