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COMSPHERE 3550 Series Data Service Units
5-24 February 1995 3550-A2-GB20-10
Table 5-11
(2 of 4)
MUX (Port) Configuration Options*
Async Rate: =Sync
Next =Sync 1800 1200 600 300 150 Prev
Asynchronous Rate
. Specifies the rate of an asynchronous port. The asynchronous rate must be
less than
or
equal to
the synchronous data rate of the port. Set the synchronous data rate for a port via the Port Speed (PrtSp) configuration
submenu. This configuration option is displayed only if
Async
→
Sync
is enabled.
Option Verification: When 1800 bps is selected, the DSU verifies that the synchronous port speed is 2400 bps or
greater. If only one stop bit is used, the asynchronous rate
cannot
be equal to half the synchronous rate.
=Sync — Select for the asynchronous rate to be the same as the synchronous rate.
1800 — Select the rate of the asynchronous port.
to 150
AsyncBit/Char: 8
Next 6 7 8 9 10 Prev
Asynchronous Bits per Character
. Specifies the length of a character, including the parity bit but excluding the start and
stop bits. This configuration option is displayed only if
Async
→
Sync
is enabled. If set to 10, the
Stop Bits
configuration
option only displays 1.
6 to 10 — Select the asynchronous bits per character.
Stop Bits: 1
Next 1 2 Prev
Stop Bits
. Specifies the number of stop bits in an asynchronous character. This configuration option is displayed only if
the
Async
→
Sync
configuration option is enabled and
AsyncBit/Char
is set to 6, 7, 8, or 9. If
AsyncBit/Char
is set to 10,
only 1 stop bit appears.
1 to 2 — Select the number of stop bits to be used.
Overspeed: 2.5
Next 1.25 2.5 Prev
Overspeed
. Selects the overspeed range of the asynchronous-to-synchronous converter. This configuration option only
applies when
Async
→
Sync
is enabled.
1.25 — Select the basic overspeed range.
Basic range
provides 1.25% overspeed in the DTE asynchronous data
rate.
2.5 — Select the overspeed percentage for extended range.
Extended range
provides 2.5% overspeed in the
DTE asynchronous data rate.
RTS Cntrl: DTE
Next FrcOn DTE Prev
Request-to-Send Control
. Controls the behavior of the internal RTS lead.
FrcOn — Select for the DSU to keep the internal RTS ON continuously. Any data appearing on the transmitted data
(TXD) lead from the DTE is transmitted immediately.
DTE — Select for the DSU to turn ON RTS when the external RTS is turned ON. CTS is turned ON or Off by the
external control signal RTS.
* The menu paths for Prt1 and Prt2 are identical.