4RF Aprisa XE User Manual page 138

136 | Configuring the Traffic Interfaces
HSS DSR / DTR Mode
Set the DSR DTR Mode as required according to the table below. This field controls the state of the
outgoing interface control line.
When the HSS interface is DCE, the outgoing control line is DSR
When the HSS interface is DTE, the outgoing control line is DTR
DSR DTR Mode
Always Off DSR driven to off state
Always On DSR driven to on state
Follows Carrier DSR follows the state of
the RF link
Follows Carrier DSR follows the state of
+ Remote the RF link and the
DSR/DTR remote terminal DSR
control line if the
remote terminal is a
DTE, or the remote DTR
if the remote terminal is
a DCE.
HSS as a DCE
DTR driven to off state
DTR driven to on state
DTR follows the state
of the RF link
DTR follows the state
of the RF link and the
remote terminal DTR
control line if the
remote terminal is a
DCE. The remote HSS
can only be a DCE.
Aprisa XE User Manual
HSS as a DTE
To follow carrier is to indicate
the state of synchronization of
the RF link.
Control line pass-through mode
where DSR and DTR are carried
over the link from end to end.
The carrier (as above) plus the
remote terminal input control
line must be present to output
the local control line signal.
The HSS Control bit in the Cross
Connections application must
be set for the remote signalling
to operate.
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