The conditioned diphase group modem input/output also provides for a combined digital orderwire
to be received/transmitted along with the group data. This combined digital orderwire is available
when group data rate is 256 kb/s and above and includes 16 kb/s of DVOW and 2 kb/s of CESE
Dedicated User. A 16 kb/s or 32 kb/s dedicated user option is available. If this option is used,
data from the dedicated user is included in the multiplexed output SG. One of the four received
SG'S will contain data for the dedicated user. That particular demux will be selected to complete
routing of data to the dedicated user.
Orderwires. Two digital voice orderwires are available: a 16 kb/s DVOW and a 2.4 kb/s DVOW.
Earth side interface for the 2.4 kb/s DVOW is with an advanced narrowband digital voice terminal
(ANDVT). This orderwire provides terminal to terminal communications. Data for this orderwire is
included as part of the overhead in the SG.
The 16 kb/s DVOW has two operating modes (non-secure and secure). Mode selection is controlled
by the operator. Earth side interfaces are with a H-250 handset, a KY-57/58 Vinson, and a CNCE.
The CNCE interface is through the combined digital orderwire that is part of the conditioned diphase
group modem input/output, The Vinson and CNCE are secure orderwires.
The term "local" means your TD-1337(V)/G and the term "remote" means TD-1337(V)/G's that are
on the other side of the satellite. Local and remote TD-1337(V)/G's must be in the same orderwire
modes to conduct a conversation. Following is a list of points between which 16 kb/s DVOW con-
versations can be conducted.
H-250 handset to H-250 handsets at remote TD-1337(V)/G's
Vinson to local CNCE
Vinson to Vinsons at remote TD-1337(V)/G's
Vinson to CNCE at remote TD-1337(V)/G's
CNCE to Vinsons at remote TD-1337(V)/G's
CNCE to CNCE at remote TD-1337(V)/G's
CESE Telernetry, Communications equipment support element (CESE) telemetry
is a collection
equipment status reports that are processed for transmission to the controlling CNCE.
Up to 56 CESE status points are monitored, formatted to a block message, and applied to a digital
loop encryption device (DLED) as 150 b/s CESE data (red). The DLED encrypts the data and
returns it as 2 kb/s CESE data (black), The encrypted CESE data is then included as part of
the overhead in the SG.
CESE telemetry is demultiplexed out of the received SG'S and made available as 2 kb/s CESE
telemetry in balanced NRZ format. A CESE telemetry interface is also available through the combined
digital orderwire that is part of the conditioned diphase group modem input/output. The DLED output
or the output of demux 1 can be selected by the operator for this interface.