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Pin | Signal | EIA CKT |
From DCE |
To DCE |
---|---|---|---|---|
1 | Frame Ground | AA | ||
2 | Transmitted Data | BA | D (Data) | |
3 | Received Data | BB | D | |
4 | Request to Send | CA | C (Control) | |
5 | Clear to Send | CB | C | |
6 | Data Set Ready | CC | C | |
7 | Signal Gnd/Common Return | AB | ||
8 | Rcvd. Line Signal Detector | CF | C | |
11 | Undefined | |||
12 | Secondary Rcvd. Line Sig. Detector | SCF | C | |
13 | Secondary Clear to Send | SCB | C | |
14 | Secondary Transmitted Data | SBA | D | |
15 | Transmitter Sig. Element Timing | DB | T (Timing) | |
16 | Secondary Received Data | SBB | D | |
17 | Receiver Sig. Element Timing | DD | T | |
18 | Undefined | |||
19 | Secondary Request to Send | SCA | C | |
20 | Data Terminal Ready | CD | C | |
21 | Sig. Quality Detector | CG | C | |
22 | Ring Indicator | CE | C | |
23 | Data Sig. Rate Selector (DCE) | CI | C | |
24 | Transmitter Sig. Element Timing | DA | T | |
25 | Undefined |