Black Box ME260A, Owner'S Manual

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Table A-1 (continued). Plug-in module’s interface connectors
(line functions).
Description Abbr. Direction EIA ITU V.35 V.36 ITU X.21
of Signal RS-232C V.24 Pin Type Pin Wire Circuit Abbr. Circuit Pin
to RS-232D V.35 No. Name
CircuitPin V.36
Ring RI DTE CE 22 125 J Unbal 15 IC
Indicator
Timing Transmit TTC DCE DA 24 113 U(A) Bal 17 A TT
Clock W9B) 35 B
(from DTE)
Transmit TC DTE DB 15 114 Y(A) Bal 5 A ST S Signal
Clock AA(B) 23 B Timing
(from DCE)
Receive RC DTE DD 17 115 V(A) Bal 8 A RT 6(A)
Clock X(B) 26 B 13(B)
(from DCE)
Tests Remote RLB DCE RL 21 140 HH Unbal 14 RL
Digital
Loopback
V.54/2
Local LLB DCE LL 18 141 JJ Unbal 10 LL
Analog
Loopback
V.54/3
Test Mode TM DTE TM 25 142 KK Unbal 18 TM
Sources EIA ISO CCITT ISO V.35 ISORS-499 ISO 4903
RS-232C 2110 V.24 2593 4902 (X.21/X.27)
RS-232D
APPENDIX A: Interface Data