User Manual

Configuring the traffic interfaces | 112
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
HSS as a DCE HSS as a DTE Comment
Always Off DSR driven to off state DTR driven to off state
Always On DSR driven to on state DTR driven to on state
Follows Carrier DSR follows the state of
the RF link
DTR follows the state of
the RF link
To follow carrier is to
indicate the state of
synchronization of the
RF link.
Follows Carrier
+ Remote
DSR/DTR
DSR follows the state of
the RF link and the
remote terminal DSR
control line if the remote
terminal is a DTE, or the
remote DTR if the remote
terminal is a DCE.
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.
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.