MDS 05-3627A01, Rev. D
LEDR Series I/O Guide
99
Verification and Reboot
When the download is complete, verify the firmware image and reboot
the radio as described under Verification and Reboot in Paragraph
“Verification and Reboot” on Page 94
9.0
USING ORDERWIRE
9.1 Introduction
A handset may be plugged into the front panel of the LEDR radio to
allow voice communications between radio sites (see
). This
can be especially useful during setup and maintenance activities. All
radios on the network can hear what is said by any individual speaking
into a handset. No other radio may transmit on the orderwire until the
current speaker is finished. Depending on the number of hops, the link
data rates, and Interleave setting, there may be a noticeable latency from
one end of the network to the other.
The front panel alert function (
and
alert
com-
) can be used to signal all units in the network or a spe-
cific radio.
Normal payload data is not affected by Orderwire use. The Orderwire
uses voice-compression technology that introduces a slight, but notice-
able, delay in Orderwire audio.
The orderwire will not interrupt the normal data flow through the LEDR
data communication channel, however, it will reduce the throughput
efficiency of any data communications on the Service Channel during
periods of voice transmission.
A handset kit is available from MDS (P/N 02-1207A01), which pro-
vides basic communication services but does not contain a built-in
DTMF (tone) keypad. (The Orderwire supports the transmission of
DTMF-type signaling by detecting tones at the source, and regenerating
them at the receiving end, however, there are no DTMF supported radio
functions in the LEDR radios.)
9.2 Setup
Program the
vox
and
volume
setting for each radio. The volume setting is
user preference. The
vox
setting requires some forethought. The higher
the
vox
setting, the louder the user must speak to get the voice decoder
to recognize the speech. This will, however, prevent noise from entering
the “line.” A low
vox
level will recognize speech better but may transmit
more noise with the speech. The user should experiment with the
vox
setting to determine the best level for the speaker and the noise environ-
ment.
