Installation guide

Appendix A. Electrical Interfaces
Signal Name
Source
EIA-232 EIA-530 EIA-449 V.35
Mnemonic Pin Mnemonic Pins
(A/B)
Mnemonic Pins
(A/B)
Mnemonic Pins
Receive Signal
Element
Timing
DCE DD 17 DD 17 / 9 RT 8 / 26 115 V / X
Local
Loopback
DTE LL 18 LL 18 LL 10 141 L
Remote
Loopback
DTE RL 21 RL 21 RL 14 140 N
Ring Indicator DCE CD 22 - - - - 125 J
Transmit
Signal Element
Timing
DTE DA 24 DA 24 / 11 TT 17 / 35 113 U / W
Test Mode DCE RM 25 TM 25 TM 18 142 NN
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