file:///C|/Documents%20and%20Settings/POpitz/My%20Documents/temp/UnidenManBeta/DecipheringTrunkedSystems.html
develop a scanner that can monitor them.
These non-scannable systems are identified in the system type as:
●
EDACS w/ESK
●
LTR Passport
●
OpenSky Standard
●
MPT1327
●
Tetra
System Voice
The other line inside the red square in the screenshot is System Voice , which summarizes the
kinds of voice modulation used on the system. Youll find the following voice types:
●
Analog (can be heard with any trunking scanner)
●
APCO-25 (can be heard with a digital scanner)
●
ProVoice (cannot be heard by any scanner)
●
VSELP (cannot be heard by any scanner)
The system voice also tells us
when digital channels are
mixed in with analog
channels on the same system.
Unfortunately, this means the
system voice line can cause a
lot of confusion. Just
remember: system voice does
not define the system type .
For example, in the system
information shown to the left,
we see that APCO-25 can be
used as a voice type on a Motorola system that is not actually a P25 system . When we're trying
to determine whether a system is a P25 system, we need to ignore the System Voice line and
focus on the System Type line. If there is P25 Voice on a non-P25 system, the scanner can sort
this out while scanning.
System Frequencies
The system frequencies section in the database lists all the frequencies used by the system (see
the blue square in the screenshot above on the right). For Motorola and P25 systems, you will
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