E.F. Johnson Company 7780 Series, Preliminary Service Manual, Page: 33 / 116

TRANSCEIVER OPERATION
2-19
November 1999
Part No. 001-7780-500
Emergency Calls
An emergency call urgently requests access to a
voice channel. To place this call, proceed as follows:
1. Select a SMARTNET/SmartZone channel that has
this feature enabled and press the Emergency option
switch. The emergency mode is indicated when
“EMERGNCY” is indicated in the display for 3
seconds.
2. To place the emergency call, manually press the
PTT switch and begin speaking as with a standard
call. All group calls which follow are then emer-
gency calls (private, telephone, and call alert calls
are not allowed). If the channel is changed, the call
is made on the emergency talk group programmed
for the new channel.
3. To exit this mode, power must be turned off and then
on again.
2.5.11 FAILSOFT OPERATION
If a failure occurs in the SMARTNET/Smart-
Zone system so that it cannot be used, the transceiver
automatically enters the failsoft mode. When this
mode is selected, the display alternately indicates
“FAILSOFT” and the alias of the selected channel.
When in the failsoft mode, operation is in the
conventional mode on a preprogrammed failsoft
channel. If a transmission is attempted before a failsoft
channel is located, a continuous tone sounds until the
PTT switch is released. When the radio system returns
to normal operation, this condition is automatically
detected and normal operation resumes.
2.5.12 SMARTNET/SMARTZONE SCANNING
Scanning on a SMARTNET/Smartzone channel
is similar to the standard scanning described in Section
2.3.11. Each channel can be programmed with a
different scan list that includes up to 16 channels, one
of which can be a priority channel.
Scanning is enabled/disabled by the Scan option
switch. In addition, channels can be programmed so
that scanning automatically starts whenever the
channel is selected. Scanning is temporarily disabled
and “
S
” turns off if a channel is selected that has scan-
ning disabled. Then when a channel is selected again
that permits scanning, it is automatically re-enabled.
In addition to calls on channels in the scan list,
pages, private calls, and telephone calls are received
while scanning. Messages on the priority channel are
received while listening to lower priority messages.
However, private and telephone calls are not inter-
rupted by calls on the priority channel.
2.5.13 DYNAMIC REGROUPING
The dynamic regrouping feature allows a
dispatcher to switch users to a dynamically defined
channel to receive an important message. Dynamic
regrouping operates as follows:
1. When this command is received, the alternating
dynamic regrouping tone sounds, the transceiver
automatically changes to the regrouping channel,
and the display alternately indicates “REGROUP”
and the alias of the selected channel. All transmit-
ting and receiving then occurs on this channel.
2. To reset all talk and announcement groups to normal
so that only the designated regrouping channel is on
the dynamic group, manually select the designated
regrouping channel if you know it. If this channel is
not selected or there is no designated regrouping
channel, all transmissions occur on the dynamically
assigned group regardless of which channel is
selected, and the regrouping tone sounds each time
the PTT switch is pressed.
3. When regrouping is canceled by the dispatcher,
transceiver operation returns to normal.
2.5.14 SMARTZONE FEATURES
Introduction
As described in Section 2.3.12, the SmartZone®
mode provides wide area coverage by allowing
roaming between SMARTNET and conventional sites.
SmartZone operation is the same as SMARTNET with
the following additional features:
Determining Current Site
To determine the current radio site, momentarily
press the Site Search option switch (if programmed). If