Bay Networks 3395A, Руководство по настройке

Страница: 38 / 146

Basic Setup Activities for Access Serving
2-4 893-826-A
Six-Wire Cabling
The 6-wire 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, because there are only three control signals.
This scheme is useful with the following applications:
• Terminal emulation and file transfer applications, such as Kermit,
Xmodem, Microphone, and so on (cabling shown in
Figure 2-1 )
• Applications such as SLIP and PPP using low-speed modems (modem
control or DCD/DSR enabled and cabling shown in
Figure 2-1 )
• Applications such as SLIP and PPP using high-speed modems (RTS/CTS
flow control enabled and cabling shown in
Figure 2-2 )
• Applications using CCITT V.42-compliant modems or other devices
operating at high port speeds
Figure 2-1 is a wiring diagram that shows the cabling needed to connect a
communication server serial port to a modem for most standard applications
(i.e., those that do not require RTS/CTS hardware flow control).
Figure 2-2
shows the wiring for applications that require RTS/CTS flow control.
Figure 2-1. Modular cables for connecting a modem (6-wire port)
Straight Through Cable
Communication
Server Connector
To
Modem
Modular Adapter
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
RING
DTR
XMT
XMTGND
RCVGND
RCV
DCD
Not used
Male RJ-45
Connector Female RJ-45
Connector
Male RJ-45
Connector
Straight Through Cable
4897
Modem Connector
Pin Signal Male DB-45
Connector
1
2
3
4
5
6
7
8
22
20
2
7
3
8
6
4
5
Female RJ-45
Connector
Adapter Wiring
(Female RJ-45 to Male DB-25)
RING
DTR
XMT
GND
RCV
DCD
DSR
RTS
CTS