Juniper CTP Series Hardware Guide

X.21 Connector Interface Signal Pinouts (DB-15 Female DCE)
Table 5 on page 31 lists the X.21 interface signal pinouts for the HD-26 connector to the female DB-15
connector for the CTP150 platform.
Table 5: X.21 DCE Connector Interface Signals for HD-26 to Female DB-15
DescriptionDB-15 PinHD-26 Pin
Receive Data—A (output from CTP)41
Receive Clock—A (output from CTP)62
Transmit Clock—A (input to CTP)74
Transmit Data—A (input to CTP)25
Signal Out—A (output from CTP)58
Signal Out—B (output from CTP)129
Signal In—B (input to CTP)1010
Signal In—A (input to CTP)311
Receive Data—B (output from CTP)1114
Receive Clock—B (output from CTP)1315
Transmit Clock—B (input to CTP)1417
Transmit Data—B (input to CTP)918
Ground824, 26
X.21 Connector Interface Signal Pinouts (DB-15 Male DTE)
Table 6 on page 31 lists the X.21 interface signal pinouts for the HD-26 connector to the male DB-15
connector for the CTP150 platform.
Table 6: X.21 DTE Connector Interface Signals for HD-26 to Male DB-15
DescriptionDB-15 PinHD-26 Pin
Transmit Data—A (output from CTP)41
31

Juniper CTP Series Specifications

General

Brand	Juniper
Model	CTP Series
Category	Server
Language	English