Multitech MT64DSU Owner's Manual page 18

MT64DSU Owner's Manual
DDS clocking (default) allows the MultiDSU64K to accept timing
signals from the DDS network's receive bipolar signal. Use this
selection whenever the MultiDSU64K is connected to the DDS
network lines.
Internal Clocking
External Clocking
DDS Clocking
(Factory Default Setting
Switch #5
Asynchronous/Synchronous Operation
(Asynchronous/Synchronous Mode)
The MultiDSU64K can operate in either Asynchronous or
Synchronous mode. In Synchronous mode, start and stop bits are
eliminated; internal clock circuits for receive and transmit timing on
the RS-232C or V.35 interface are activated.
Asynchronous Operation
Synchronous Operation
(Factory Default Setting
Switch #6
Request To Send Forced - "RTS"
(Asynchronous/Synchronous Mode)
With this option enabled, the MultiDSU64K provides a continuous
CTS signal, and disregards the state of the RTS signal at the DTE
interface. This provides a continuous outbound indication to the
network and remote device that there is a " Carrier on ". For many
networks (e.g., point-to-point), it is best to maintain a " Carrier on "
status on the communications channel to help minimize line
turnaround delays. This option is usually enabled for central site
DSU installations with multipoint lines (i.e., when continuous
outbound " Carrier on " is desired). This option must be disabled on
the remote station of a multipoint installation. When this option is
disabled, the MultiDSU64K receives and uses the RTS signal from
the DTE.
RTS functions Normally
RTS forced On
(Factory Default Setting
18
= Switch #3 UP and Switch #4 UP
= Switch #3 UP and Switch #4 DN
= Switch #3 DN and Switch #4 DN
= Switch #3 DN and Switch #4 DN)
= Switch #5 UP
= Switch #5 DOWN
= DOWN)
= Switch #6 UP
= Switch #6 DOWN
= DOWN)