SFFR-6
User Manual
Configuration
Doc ID: ES1002-UM02-v204a
Copyright © 2014 Etherstack London Limited
Page 24 of 39
Field
Description
Duplexor Group Tag
If Duplexor Group Tags have been created, you can select a Duplexor Group to associate this profile with.
Selecting a specific Duplexor tag means this profile will only be available on the GoBox control interface if
the corresponding Duplexor is installed.
If Duplexor Group Tags have not been created, you can select
All
and then edit the profile once Duplexor
Group tags have been created. Selecting
All
means this profile option will always be available to select on
the GoBox control interface regardless of what Duplexor is installed.
Once an operational profile is associated with a Duplexor Group Tag, it may also be chosen as the default
start-up profile for a Duplexor.
Rx Frequency
This should be set to the desired centre receive frequency. The installed duplexer must be calibrated to this
frequency to ensure optimal RF performance.
Tx Frequency
This should be set to the desired centre transmit frequency. The installed duplexer must be calibrated to
this frequency to ensure optimal RF performance.
Tx Power
The transmit power in Watts to use for this operational profile.
Site ID
The Site ID indicates the identity of the P25 site and is inserted into over-the-air traffic. The Site Id must be
unique within an RFSS when the GoBox is used in Network mode.
The Site ID is limited to values between 0 and 255 (decimal).
P25 Type
The P25 Type field indicates the level of filtering the GoBox will apply to a received signal before repeating
the signal.
P25ConventionalMonitor
All detected P25 signals will be repeated. A user specified NAC will be used
for transmission.
P25ConventionalNAC
The GoBox will unsquelch on a NAC code
P25ConventionalGroup
The GoBox will unsquelch on both a NAC code and a Talkgroup Id
NAC
The NAC is a feature similar to CTCSS or DCS for analogue radios. Repeaters can be programmed to only
repeat P25 signalling when receiving the correct NAC.
NACs are programmed as a three-hexadecimal-digit code that is transmitted along with the digital signal
being transmitted.
Three of the possible NACs have special functions
0
x293 ($293)
the default NAC
0xf7e ($F7E)
a repeater set for this NAC will repeat P25 signalling on any decoded signal
received
0xf7f ($F7F)
a repeater set for this NAC will allow all incoming decoded signals and the
repeater transmitter will retransmit the received NAC
Talkgroup (optional)
The GoBox may be configured to only repeat P25 signals matching a certain Talkgroup Id.
Allowed values are 1 to 65535 inclusive.
IP Address
IP Address the GoBox will use when this operational profile will be selected. The GoBox will reconfigure its
network interface and IP address to this value when selected.
Subnet mask
The subnet mask the GoBox will use when this operational profile is selected.
Default gateway
The default gateway the GoBox will use when this operational profile is selected.
Site Subscriber Id
The site subscriber ID is used to register and affiliate with the RNC to allow multisite conventional
repeating. The value should be unique and homed to an RFSS.
RFSS Id
P25 Radio Frequency Sub-System Id.
Allowed values are hexadecimal (00 to FF)
WACN
P25 Wide Area Communications Network ID.
Allowed values are hexadecimal (00000 to FFFFF)
System Id
P25 System ID.
Allowed values are hexadecimal (000 to FFF)
Group Id
P25 Network Talkgroup ID.
Allowed values are hexadecimal (0000 to FFFF)
RNC IP Address
The static IP Address of the RNC in the IP network that the GoBox will register with.
Once the form has been completed, press the
Save
button to save the profile or
Cancel
to abort the operation.
Once save is pressed the profile is written to the GoBox.
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