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## Related Documentation

- CTP150 Serial Interface Module

# CTP150 Multiservice Interface Module

The Juniper Networks CTP150 Circuit to Packet platform optionally includes a Serial Multiservice Interface module CTP150-IM-SER-MS. The module provides 4-KHz or high quality analog audio, or interrange instrumentation group (IRIG) signals.

The multiservice card enables an IRIG time code (IRIG-B) signal to be transported through an IP network. The IRIG-B standard consists of a family of rate-scaled serial time codes with formats containing up to three coded expressions or words. The IRIG-B pulse code contains one frame of 100 elements per second for the time of the year and GPS receiver status. IRIG-B encodes day of year, hour, minute, and second data on a 1-KHz carrier frequency, with an update rate of once per second.

| Note: Only ports 0 and 2 (the bottom two ports) on the front of the serial module can be used for the multiservice features. You can configure direction, output high and low levels, and data range for this module.

The four-port serial interface module supports individual cabling for each port. The CTP150 ports have small serial ports for HD-26 26-pin connectors (see Figure 1). The lowest-numbered port (marked 0) is at the bottom left, and the highest-numbered port (marked 3) is at the top right.

Figure 1: CTP150 Serial Interface Module

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.

| Note: The external clock reference port must be the one in module slot 0, the right-most slot in the front of the CTP150 chassis.

## Related Documentation

- CTP150 Serial Interface Module

#### Published: 2011-01-31

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