CD2481 Datasheet, PDF (69/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

Programmable Four-Channel Communications Controller — CD2481
Table 10. DTE Connections
CD2481
CTS*
DSR*
TXCOUT/DTR*
RXCIN
TXCIN
RXCOUT
CD*
RS-232-C
CB
CC
–/CD
DD
DB
DA
–/CF
X.21
I
–
–
S
S
–
–
X.21bis (V.24)
106
107
108.2
115
114
113
109
Table 11 shows the recommended DCE (data communication equipment) connections between the
CD2481 and RS-232-C, X.21 and X.21 bis standard interfaces.
Table 11. DCE Connections
CD2481
RXD
TXD
RTS*
CTS*
DSR*
TXCOUT/DTR*
RXCIN
TXCIN
RXCOUT
CD*
RS-232-C
BA
BB
CB
CA
CD
DB/CC
–
DA
DD
DA/–
X.21
T
R
I
C
–
S
–
–
–
–
X.21bis (V.24)
103
104
106
105
108.2
114/107
–
113
115
–
NOTE: X.21 is completely different from X.21 bis.
Reference: CCITT 1988 Blue Book.
Datasheet
69