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P300H P300 Series Modem Installation and Operating Handbook Page 83
Tx & Rx ESC Interface: [Link-R]
1=RS232 2=RS422 3=RS485 4:Link to remote M&C
Change, Tx/Rx, ESC/Aux/BA, Cfg Interfaces, ESC Menu
Internal link to M&C Port: [Local]
1=Local M&C PC end 2=Remote end
Change, Tx/Rx, ESC/Aux/BA, Cfg Interfaces, ESC, Link to M&C
Aux Interface: [RS232]
1=RS232 2=RS422
Change, Tx/Rx, ESC/Aux/BA, Cfg Interfaces, Aux Menu
6.6.33 Change, Tx/Rx, ESC/Aux/BA, INTERFACES Menu
This leads to the selection of the ESC and Aux interfaces. The interface selection screens are only shown
for active ports, and so either or both may show in turn depending on how the ports are defined for use. If
both are active then the ESC interface is selected first. NOTE that these are some of the few menus which
appears on both Tx & Rx menu trees, but for which the setting is common to both !
ESC Interface
All options except 4 are self explanatory, [Link-R] means Link-Remote and [Link-L] Link-Local. Option 4
leads onto the following menu:
This instructs the Modem make an internal link between the ESC port and the remote M&C port. It must
be set specifically for the end of the link the modem is located at. When either of these options are
selected, the physical ESC port is disabled, as it is linked internally to the M&C port.
LOCAL Incoming messages (on this modems remote M&C port Rx lines from the M&C
Master device) are routed directly to the Tx ESC channel and out over the satellite
link. Messages from the incoming satellite link on the Rx ESC channel are routed
onto the Tx output lines of the remote M&C port, to return the responses to the
Master M&C device.
REMOTE Messages from the incoming satellite link on the Rx ESC channel are driven onto
the remote M&C port Rx (input) lines, allowing any devices daisy chained to the
remote M&C port to receive a message (including this modem). Messages
present on the remote M&C port Tx (output) lines, which includes any response
from this unit or any device daisy chained to the remote M&C port, are routed to
the Tx ESC channel and back via the satellite link.
Aux Interface
Following the ESC interface selection the Aux port may be configured (self explanatory):