Paradyne 3551 manual General Configuration Options, Dte, =Rts

Configuring the Unit

Table 5-8

(1 of 4)

General Configuration Options

DTE Port: EIA232

Next EIA232 V.35 Prev

DTE Port (not displayed when a TDM/Flex is installed and enabled). Selects the active DTE interface.

EIA232 Ð Select when using the EIA-232 interface (connector). EIA232 operation is recommended for speeds

19.2kbps or below. Operation at speeds up to 56 kbps is dependent upon cable length, cable quality, and the local environment.

V.35	Ð Select when using the V.35 interface (connector). Operation at available rates for distances up to 1000
	feet.
RTS Cntrl: DTE for MPTT; FrcOn for other configurations
Next	FrcOn	DTE	Prev

Request-to-Send Control. This configuration option determines how the DSU will function with respect to the RTS lead. If set to FrcOn, the DSU internally forces the RTS lead ON; if set to DTE, the DSU sends control mode idle (CMI) whenever RTS is Off, and data mode idle (DMI) when RTS is ON.

FrcOn	Ð Select for PTPC, PTPT, and MPTC configurations. With this setting, the DSU internally forces data mode
		idle (DMI), regardless of whether RTS at the DTE interface is ON or Off.
DTE	Ð Select for MPTT configuration. This setting causes the DSU to send a control mode idle (CMI) signal
		whenever RTS is Off, and a data mode idle (DMI) signal when RTS is ON.
CTS Cntrl: Std
Next	Std	=RTS	Delay	FrcOn	Prev

Clear-to-Send Control. Controls the behavior of the CTS lead when abnormal conditions are present (e.g., No Signal or Test Mode), as determined by the configuration options RTS Cntrl and Circ Assur.

Std	Ð	Select for all factory-loaded configurations (PTPC, PTPT, MPTC, and MPTT) so that the DSU responds to
		abnormal conditions. When selected, CTS follows RTS except when the DSU is in Test Mode, or an
		alarm or CMI is being received, and Circ Assur is set to Enab.
=RTS	Ð	When selected, CTS follows RTS regardless of whether Test Mode, an alarm, or CMI is being received.
Delay	Ð	Select when using automatic backup. Selecting Delay is the same as selecting Std except that when an
		alarm is received, CTS does not go low (drop) until the DBM or external DBU has failed to backup in the
		time allotted by the Tries Time-Out(in the Backup options set) setting. Make sure that Auto Backup (in
		the Backup option set) is enabled.
FrcOn	Ð	When Forced On is selected, CTS remains ON as long as the DSU is receiving power .

AntiStream:Disab

Next Chang Prev

Antistreaming (only displayed when Full Mode is enabled, and a TDM/Flex is not installed). Antistreaming provides circuit protection against a streaming DTE (a defective DTE that has its RTS lead constantly turned ON) by clamping the RTS lead of the tributary DSU.

Antistreaming only takes effect when RTS Cntrl is set to DTE; it is disabled when RTS Cntrl is set to FrcOn.

Chang Ð Set timer to any value from 1 to 100 second(s), in increments of 1; or to Disab when streaming terminal detection is not needed.

3550-A2-GB20-20 December 1996 5-17