Domestic 1/0 Board (A9) Jumpers -- Continued
Same as W, X except on J4.
Normal configuration when the transmit pre-emphasis capability
is not used. If use of pre-emphasis is desired, remove jumper
from EE and add to FF.
Local Audio Loopback may be controlled by an EIA signal on J1-19.
Local dc Loopback may be controlled by an EIA signal on J1-13.
With jumper installed, the transmit audio level is reduced by 1
These jumpers are not used in this model.
G, H, I,
f. Rate/Mode Display Board. One jumper is located on the rate/mode board (fig
to blank out the rate/mode
display so no indications are visible
at the modem front panel. The V.29 modem is normally shipped with the blanking
jumper removed so the indications are visible.
Rate/Mode Display Blanking Jumper