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EIA-449 (RS-449)
coté DTE
coté DCE


N° broche Nom V.24 Dir Description Type
1   101   Shield Ground
2 SI 112 --> Signal Rate Indicator Control
3 n/a   n/a unused  
4 SD- 103 --> Send Data (A) Data
5 ST- 114 <-- Send Timing (A) Timing
6 RD- 104 <-- Receive Data (A) Data
7 RS- 105 --> Request To Send (A) Control
8 RT- 115 <-- Receive Timing (A) Timing
9 CS- 106 <-- Clear To Send (A) Control
10 LL 141 --> Local Loopback Control
11 DM- 107 <-- Data Mode (A) Control
12 TR- 108.2 --> Terminal Ready (A) Control
13 RR- 109 <-- Receiver Ready (A) Control
14 RL 140 --> Remote Loopback Control
15 IC 125 <-- Incoming Call Control
16 SF/SR+ 126 <--> Signal Freq./Sig. Rate Select. Control
17 TT- 113 --> Terminal Timing (A) Timing
18 TM- 142 <-- Test Mode (A) Control
19 SG 102   Signal Ground Ground
20 RC 102b   Receive Common Ground
21 n/a   n/a unused  
22 SD+ 103 --> Send Data (B) Data
23 ST+ 114 <-- Send Timing (B) Timing
24 RD+ 104 <-- Receive Data (B) Data
25 RS+ 105 --> Request To Send (B) Control
26 RT+ 115 <-- Receive Timing (B) Timing
27 CS+ 106 <-- Clear To Send (B) Control
28 IS n/a --> Terminal In Service Control
29 DM+ 107 <-- Data Mode (B) Control
30 TR+ 108.2 --> Terminal Ready (B) Control
31 RR+ 109 <-- Receiver Ready (B) Control
32 SS 116 <-- Select Standby Control
33 SQ 110 <-- Signal Quality Control
34 NS n/a --> New Signal Control
35 TT+ 113 --> Terminal Timing (B) Timing
36 SB 117 <-- Standby Indicator Control
37 SC 102a   Send Common Ground