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Hardware Installation
Zero modem operation: Connecting two DTEs taking the CP 523 to CP 523 example
CP 523
Figure 3-12. Zero Modem Operation Taking the CP 523 to CP 523 as Example
Connecting a DTE to a DCE taking the CP 523 to modem (SIEMENS 2425 B DX) as example
CP 523
Note:
Only relevant in the case of communications using an RS-232-C (V.24) interface!
The "3964(R) communications mode" data transmission procedure does not support control
lines (DSR, DTR, CTS, RTS).
3-12
V.24 -RXD (5)
V.24 -TXD
(11)
DSR
(7)
DTR
(15)
CTS
(9)
RTS
(13)
GND
(2/21/23)
Shield
(24/25)
V.24 -RXD (5)
V.24 -TXD (11)
RTS
(13)
CTS
(9)
DTR
(15)
DSR
(7)
GND
(2)
Shield
(1)
Shield
(8)
Figure 3-13. Pin Assignments for CP 523 to Modem
(11)
V.24 -TXD
(5)
V.24 - RXD
(15)
DTR
(7)
DSR
(9)
CTS
(13)
RTS
(2/21/23) GND
(24/25)
Shield
(3)
Modem RXD
(2)
Modem TXD
(4)
Modem RTS
(5)
Modem CTS
(20)
Modem DTR
(6)
Modem DSR
(7)
GND
(1) Shield
CP 523
CP 523
Modem
EWA 4NEB 811 6044-02a
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