User Manual

Configuring the traffic interfaces | 113
HSS DCD mode
Set the DCD Mode as required according to the table below. This setting is only relevant in DCE
mode.
DCD Mode HSS as a DCE HSS as a DTE Comment
Always Off DCD driven to off state
Always On DCD driven to on state
Follows Carrier
+ Remote DCD
DCD follows the state of
the RF link and the
remote terminal DCD
input control line if the
remote HSS is a DTE. If
the remote terminal is a
DCE, then DCD only
follows the state of the
RF link.
Control line pass-through
mode where DCD is
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.
Follows Carrier
+ Remote RTS
DCD follows the state of
the RF link and the
remote terminal RTS
input control line when
the remote HSS is a
DCE.
NOT applicable
For switched carrier
applications this provides
RTS-DCD pass through
(DCE to DCE
configuration) and DCD-
DCD pass-through (DTE
to DCE configuration).
Set the XTxC Enabled control as required. Depending on the synchronous clock selection mode
selected, disabling XTxC will allow the terminal clock to be substituted for the external XTxC signal.