MRV Communications AE092FCAKA Especificações descarregar pdf (Página 64)

Cabling the LX Series

451-0308

NOTE: In order to expand the functionality of the serial interface, the LX

Series modular cabling allows you to connect different signals to

pin 7 of the LX Series. (This pin is an input to the LX Series.) When

a DCE device is connected to an LX Series serial port, the device's

DCD output is connected to pin 7. In this case, the signal at pin 7 is

referred to as DCD. DCD is used here for session control only, not

for flow control.

When a DTE device is connected to an LX Series serial port, the

device's DTR output is connected to pin 7 of the LX Series. In this

case, the signal at pin 7 is referred to as DSR. (This cabling scheme

also provides DECconnect compatibility, since DECconnect does

not support the DCD signal.)

MRV Communications 8-Wire Cabling

This cabling scheme provides XMT, RCV, DCD/DSR, DTR, RTS, CTS, and

two signal ground wires. This cabling is provided through RJ-45

connectors. Using this cabling scheme you can concurrently use modem

control and RTS/CTS hardware flow control, since there are four control

signals. This scheme is useful with relatively high speed devices, complex

modem control applications.

In Figure 25, one signal is referred to as CTS. The CTS signal designation

refers to the signal observed at pin 1 of each serial port. Pin 1 is

multiplexed to these signals.

This scheme is useful with the following applications:

• Terminal emulation and file transfer applications, such as Kermit,

Xmodem, Microphone, etc.

• Applications such as PPP using low speed modems.

• Applications such as PPP using high speed modems.

• Applications using CCITT V.42-compliant modems, or other devices

operating at high port speeds.

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MRV Communications AE092FCAKA Especificações Página 64