Motorola VRS750, Service Manual, Page: 50 / 104

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• The mobile will key up and transmit mic audio to the base.
2. During a portable-to-base repeat operation, the mobile user
initiates a mic PTT.
• A momentary talk prohibit tone will be heard and the mic
audio will be disabled.
3. During a base-to-portable repeat operation, the mobile user
initiates a mic PTT.
• The base-to-portable repeat will be interrupted.
• Mic-Hi line audio is routed to the VRS and transmitted to the
portable.
• The mobile will key up and transmit mic audio to the base.
• When the mobile mic PTT is released, the base-to-portable
repeat will continue if the mobile is still receiving a base
transmission.
NOTE: If the VRS is in a non-priority state all portable
transmissions will be heard on the mobile’s speaker.
The above descriptions apply to a VRS unit in a priority
state.
Acknowledgment
Tones
VRS Mobile-TX
Acknowledgment Tones
(Conventional Only)
When this option is enabled, the VRS transmits a feedback tone after
it has received a repeatable message on the portable frequency. This
signals the portable operator that the transmission was received. If the
repeated message was cut short due to the mobile TOT being exceeded
or the mobile channel being changed during the repeat, a lower-
pitched tone sounds. If the portable user does not hear a tone after
completing a transmission, the portable is either out of range of the
repeater or there is no priority repeater in the area.
VRS Mobile Trunking
Tones (Trunking Only)
For trunked modes, the VRS regenerates the standard trunking access
tones and transmits them to the portable. These tones, which are
essentially the same as those heard at the mobile’s speaker, are accessed
with the “quick-key” feature. For this operation, the portable user
briefly (less than one second) presses the PTT button, and then listens
for one of the following tones:
• The “talk permit” tone (three short beeps) indicates to the
portable user that the trunking system has granted a voice
channel to the mobile and that keying the portable during the
trunking system hangtime will result in acquiring this channel.
• The “system busy” tone (a telephone-like busy tone) indicates
that, at the time the portable user dekeyed, the trunking system
had no voice channel available. If the user does not key the
portable again after receiving a system busy signal, a “talk permit”
tone will be transmitted to the portable as soon as a voice channel
is available.