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V.24 Interface
22 Interphase Corporation
V.24 Interface
The following specifications describe the V.24 interface:
• Electrical specification: CCITT V.28, TIA/EIA RS-
232-C (+/-12V single-ended)
• Signaling: CCITT V.24
• Maximum data rate: 20 kilobits per second (Kbps)
• Maximum cable length: 50 feet
• Standard DCE connector: ISO2110 (DB25)
18 -ENV11 (V.11
Interface enable)
In
19 C(B)
(Command)
Out
20 DTR (Data
Terminal
Ready)
DTR (Data
Terminal Ready)
Out
21 -ENV35 In
22 RI (Ring
Indication)
RI (Ring
Indication)
In
23
24 TXCout
(Transmit
Clock—DTE)
X(A) (Transmit
Clock)
TXCout(A)
(Transmit
Clock—DTE)
Out
25 -TEST -TEST -TEST In
Pin V.24 V.11 V.35 Direction