Operator's Guide B-3
DTE Device DCE Device
Pin # Signal Abbreviation Pin #
1 Frame Ground FG 1
2%Transmitted Data TxD %2
3&Received Data RxD &3
4%Request To Send RTS %4
5&Clear To Send CTS &5
6&Data Set Ready DSR &6
7 Signal Ground SG 7
8&Data Carrier Detect DCD &8
9&Pos. DC Test Voltage +V &9
10 &Neg. DC Test Voltage -V &10
11 &Equalizer Mode QM &11
12 &Sec. Data Carrier Detect (S)DCD &12
13 &Sec. Clear To Send (S)CTS &13
14 %Sec. Transmitted Data (S)TD %14
15 &Transmitter Clock TC &15
16 &Sec. Received Data (S)RD &16
17 &Receiver Clock — &17
18 Unassigned 18
19 %Sec. Request To Send (S)RTS %19
20 %Data Terminal Ready DTR %20
21 &Signal Quality Detect SQ &21
22 &Ring Indicator RI &22
23 %Data Rate Selector — %23
24 %Ext. Transmitter Clock (T C) %24
25 Unassigned — 25
EIA RS-232-C Pin Assignments