Vertex Standard FT-1000MP manual Phone Patch Operation

Advanced Features

PHONE PATCH OPERATION

OVERVIEW

Phone patch operation allows linking your MARK- V FT-1000MPto the public telephone line to provide two-way simplex communications for MARS operation, or on behalf of a third parties. The MARK-VFT-1000MPmay be used with the LL-7phone patch unit installed in the optional SP-8external loudspeaker, or with phone patch units from other manufacturers. The diagram at the bottom of the page shows interconnection for the SP-8/LL-7combination; be sure to consult the docu- mentation provided with units of other manufacture for installation instructions.

OPERATION

Phone patch Tx/Rx switching may be done manu- ally 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 MOX button at each “over” during patched conversations. Therefore, most operators prefer to use the VOX method whenever 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.

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 trans- mit, and will help avoid “doubling” with the other sta- tion.

During all phone patch operation you should moni- tor 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-7Instruction Sheet for further de- tails on phone patch setup and operation.

Note

You may need to contact your telephone company for permission to connect another device to the phone circuit. Also, you should use a proper 600 Ohm, three-way transformer if connecting the LL- 7 with a telephone set to the same phone line.

page 84 MARK-V FT-1000MP Operating Manual