Getting Started with MAXserver Access Servers
0038
73
Communication
Server Connector
Modular Adaptor
To Modem
Straight Through Cable
Female RJ-12
Connector
Male DB-25
Connector
Male RJ-12
Connector
Male RJ-12
Connector
Straight Through Cable
DTR
XMT
DCD
RCV
GND
RING
Modem connector
Pin Signal
1
2
3
4
5
6
1
2
3
4
5
6
Female RJ-12
Connector
Adaptor Wiring - MX-350-0157
(Female RJ-12 to male DB-25)
20 •DTR
2 XMT
8 DCD
3 RCV
7 GND
22 RING
4 RTS
5 CTS
1
2
3
4
5
6
1
2
3
4
5
6
Figure 20 - Modular Cables for Connecting a Modem (6-Wire)
When using this cabling scheme, serial ports observe the DCD modem
control signal rather than the DSR modem control signal for modem control,
as well as DSRLOGOUT, SIGNAL CHECK, and hardware flow control
applications.
NBase-Xyplex 7-Wire Cabling
This cabling scheme provides XMT, RCV, DCD/DSR, DTR, RING, and
separate transmit and receive ground wires. This cabling is provided
through RJ-45 connectors (pin 8 of the connector is not used). Using this
cabling scheme you can use either modem control or hardware flow control,
but not both, since there are only 3 control signals.
This scheme is useful with the following applications:
·
Terminal emulation and file transfer applications, such as Kermit,
Xmodem, Microphone, etc.