Motorola VRS750, Service Manual

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• The “talk prohibit” tone (a long, low tone) indicates to the
portable user that the mobile cannot access the trunking system.
For portable transmissions lasting longer than one second (as opposed
to a “quick-key,” which must be less than one second), the VRS will
respond with one of the following tones. If the “Trunking Access
Tones” option is disabled in the “VRS Options” screen of the ASTRO
mobile CPS, the “trunking access good tone” and the “trunking access
bad tone” will not be generated.
• The “trunking access good” tone (a single beep) indicates that a
portable-to-base transmission has occurred and the mobile
remained keyed for the entire transmission.
• The “trunking access bad” tone (a single, low-pitched tone)
indicates that all or part of the portable-to-base transmission was
not repeated or was interrupted during the portable’s valid PL
transmission. This would handle, for example, the case of the
mobile’s TOT expiring or the case where a “system busy” is
received first, and then a “talk permit,” so that only part of the
transmission could be repeated. This tone can also indicate that
the VRS has counted down in priority from a delay state of 2 or
higher.
• The “talk prohibit” tone (a long, low tone) indicates to the
portable user that the mobile cannot access the trunking system.
• 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.
Message/Status
Acknowledgment Tones
There are four different tones that the portable user can receive at the
end of a message/status attempt:
• Message/Status Acknowledged Good Tone—This tone is generated
by the mobile when the message/status has been acknowledged
by the base station. The VRS repeats the tone to the portable.
• Message/Status Not Acknowledged Bad Tone—This tone is
generated by the mobile when the message/status has been
transmitted but was not acknowledged by the base station. The
VRS repeats the tone to the portable.
• Message/Status Not Supported Conventional Bad Tone—This
tone is generated by the VRS when it receives a message from the
mobile indicating that the message/status number selected is not
a valid message or status while the mobile is on a conventional
channel.
• Message/Status Not Supported Trunking Bad Tone—This tone is
generated by the VRS when it receives a message from the mobile
indicating that the message/status number selected is not a valid
message or status while the mobile is on a trunking channel.