Verilink C100 (880-502893-001) Product Manual - Manual (Page 36)

Configuration Using the DIP Switches
3-12 Verilink C100 and C150 T1/FT1 CSU/DSU 6/15/99
Continuous or
switched carrier
(Receive Line
Signal Detect)
control Switch pack 4 position 5 selects Switched or Continuous Carrier
Control. This option works in conjunction with the Request-To-Send
(RTS) control signal, the Carrier Detect (CD or RLSD) control signal
and the 56000/64000 (Switch pack 4 position 4) DS-0 bandwidth
selection.
If the Synchronous Channel DS-0 selection switch is 64000 (no extra
bandwidth available), both the local and remote units output Carrier is
high to the Synchronous Channel. The Switched/Continuous selectio
is then ignored.
If the Synchronous Channel DS-0 selection is 56000, the difference
between 64000 and 56000 bps of 8000 bps (or multiples) is used to pass
Request-To-Send from the local unit to the remote unit and outputted
by the remote Synchronous Channel as Carrier Detect. In this mode if
Switch pack 4 position 5 is Off (Continuous), a high is transmitted to
the remote unit and Carrier Detect will be high on the remote
Synchronous Channel. If Switch pack 4 position 5 is On (Switched), the
RTS signal at the local Synchronous Channel will be sent across the T-1
line to the Synchronous Channel at remote unit and outputted as
Carrier Detect.
If the speed of the Synchronous Channel is 224000 bps or a lower
multiple of 56000, the Carrier control signal will be aligned with data.
If the speed is above 224000 bps and multiples of 56000, the Carrier
control signal will still be transparent but may not be aligned with
data.
CAUTION
If RTS is not supported by the local terminal equipment, Switch pack 4 position 5
should be Off (Continuous) to insure that ones density will be maintained over the T-1
link.
Carrier Detect and Data Set Ready will drop if the Network Interface is Out
Of Frame. NOTE