MDS LEDR 1400F, Installation & Operation Manual

Page: 109 / 154

MDS 05-3627A01, Rev. D LEDR Series I/O Guide 101
9.4 Related NMS Commands
The orderwire can be configured by the NMS commands or through the
front panel. The earpiece volume is more easily set by the front panel
controls as the level is dependent on personal preference.
vox
– Voice level (relative) at which speech will be detected by the soft-
ware ( See “vox” on Page 88 )
volume
– Sets/displays the handset volume ( See “volume” on Page 88 )
alert
– Sends an orderwire alert to a specific radio or to all the radios on
the network ( See “alert” on Page 51 )
10.0 USING THE SERVICE CHANNEL
10.1 Concept
The Service Channel sends and receives ASCII-based information at
9600 bps in a half-duplex broadcast mode throughout the network. This
means that any data coming through the Service Channel Port of a radio
will be broadcast to the Service Channel of each radio in the network.
There can be only one radio transmitting Service Channel data over the
network at a time and the data will always be sent to every radio on the
network. No other radio will be allowed to transmit until the current
sender is finished.
If a radio does receive data in the Service Channel Port while another
radio is the active-sender, the data coming in the port will be queued and
sent when the active sender is finished. Depending on the number of
hops, link data rate, and Interleave setting, there may be a noticeable
latency from one end of the network to the other.
10.2 Setup
The user can configure all the Service Channel parameters for a specific
radio. The port may be enabled or disabled. In the disabled state (
svch
port off
), any data that comes in the Service Channel port will be dis-
carded and any Service Channel data that comes into the radio from
another radio in the network will be passed along to the rest of the net-
work but not sent out the Service Channel Port. When the Service
Channel Port (
svch port on
) is enabled, it will behave based on the other
settings.
The most important setting is the
echo
parameter. Echo is used with a
terminal emulator on a PC and the program does not display on the
screen character keyed in by the user.