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3-20

MVME712-12/-13/A/AM/B Transition Modules and LCP2 Adapter Board UserÕs Manual

Connector J12 Interconnect Signals (MVME712-13, MVME712AM)

Connector J12 is an RJ-11 modular jack on the front panel of the MVME712-13
and MVME712AM. Each pin connection, signal mnemonic, and signal
characteristic for the connector is listed in

Table 3-13

C31

CTS2

CLEAR TO SEND (serial port 2) - CTS is a function
supplied to the terminal by the modem, and
indicates that it is permissible to begin transmission
of a message. When using a modem, CTS follows the
off-to-on transition of RTS after a time delay.

A31

RTS2

REQUEST TO SEND (serial port 2) - RTS is supplied
by the terminal to the modem when it is required to
transmit a message. With RTS off, the modem carrier
remains off. When RTS is turned on, the modem
immediately turns on the carrier.

C32

DCD2

DATA CARRIER DETECT (serial port 2) - sent by the
modem to the terminal to indicate that a valid carrier
is being received.

A32

DTR2

DATA TERMINAL READY (serial port 2) - a signal
from the terminal to the modem indicating that the
terminal is ready to send or receive data.

Table 3-13. Connector J12 Interconnect Signals (MVME712-13/12AM)

Pin

Number

Signal

Mnemonic

Signal Name and Description

Not used.

TIP

Tip side of telephone line.

RING

Ring side of telephone line.

Not used.

Table 3-12. Connector P2, J11 Interconnect Signals (MVME712

x) (Continued)

Pin Number

Signal

Mnemonic

Signal Name and Description

J11