EFJohnson 002-9803-601, 98x3, 98x6 manual Miscellaneous, Call Guard Squelch, Supervisory Tones

MISCELLANEOUS

Talk-around is then automatically selected when one of these groups is selected. There is no special talk-around option switch or indicator. However, the group alpha tag on the lower line of the display may be used to indicate groups programmed for this feature. Talk-around is not available on LTR-Net and LTR systems.

Call Guard Squelch

The Call Guard squelch feature eliminates distracting messages intended for others using the channel. This is done by using a subaudible tone or digital code to control the squelch. This tone or code is unique to a user or a group on that channel. It is transmitted with the voice signal but is not heard because it is in the subaudible range and attenuated by a filter. Call Guard squelch can be programmed on each conventional group. LTR-Net and LTR opera- tion uses ID codes to perform a similar function.

MISCELLANEOUS

Supervisory Tones

The following tones are heard at various times when operating this transceiver. Some or all of these tones can be disabled by the TONES menu parameter or programming. Refer to “Tone Select” on page 26 for more information.

Busy Tone

This tone is similar to the standard telephone busy tone, and it indicates that the radio system is currently busy. The display also indicates “BUSY” while this tone is sounding. Repeated access attempts are made while the PTT switch pressed with this tone sounding. Therefore, it is not necessary to release the PTT switch to access the system. This tone sounds only with LTR-Net and LTR calls.

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