Yaesu FT-1000MP Operating Manual page 73

Operation
Phone Patch Operation
Overview
Phone patch operation allows linking your FT-
lOOOMP to the public telephone line to provide
two-way simplex communications for MARS op-
eration, or on behalf of a third parties. The FT-
10OOMP may be used with the LL-7 phone patch
unit installed in the optional SP-8 external loud-
speaker, or with phone patch units from other
manufacturers. The diagram at the bottom of the
page shows interconnection for the SP-8/LL-7
combination; be sure to consult the documenta-
tion provided with units of other manufacture far
installation instructions.
Opera tion
Phone patch TdRx switching may be done
manually using the PTT method, or automatically
using the VOX circuit of the transceiver. While the
PTT method does not require balancing the
bridge circuit in the LL-7, it does require more
work by the operator: switching the microphone
PTT or transceiver
MQX
button at each "over"
during patched conversations. Therefore, most
operators prefer to use the VOX method when-
ever the telephone signal-to-noise level permits.
If the telephone noise level is high, however, the
PTT method may still be necessary, so you should
become familiar with both methods.
ANT-A
Regardless of which patch control method is
used, you may need to instruct the person on the
telephone to speak slowly at a clear normal voice,
and to say "over" and then keep quiet when they
expect a response from the other radio station.
This serves as a notice to you (if you are using
PTT control) to switch to receive while signaling
the other station to go ahead and transmit, and
will help avoid 'Uoubling" with the other station.
During all phone patch operation you should
monitor both sides of the conversation at all times
(this may be required by law). This requires a
telephone at the operating position.
Refer to the LL-7 Instruction Sheet far fuflher
details on phone patch setup and operation.
TELEPHONE
SP-81LL-7
i
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