Paradyne 3551 manual Messages to the DSU

COMSPHERE 3550 Series Data Service Units

Table 5-11

(4 of 5)

MUX (Port) Configuration Options*

Elast Stor: Disab

Next Enab Disab Prev

Elastic Store (only displayed when Full Mode is enabled). Elastic Store hardware consists of a transmit buffer (register). Serial data from the extended circuit is clocked into the DSU elastic store using a clock provided by the extended circuit received clock lead. The DSU uses its own system timing to clock data out of the buffer.

Elastic Store is reset on power-up, overflow, or after the RTS lead makes an Off-to-ON transition. After reset, the elastic store can drift by ± 5 bits with the TDM/Flex enabled before overflow occurs.

Enab	Ð	Select to enable this configuration option.
Disab	Ð	Select to disable this configuration option.

RTS/CTS Del: 0

Next Chang Prev

Request-To-Send to Clear-To-Send Delay (only displayed when Full Mode is enabled). Allows for an additional delay between the time that RTS is turned ON and CTS is turned ON. An additional delay is sometimes required for multiplexed applications operating in switched-carrier operation. Enough delay must be provided so that the last DSU in the circuit has time to train and is ready to accept data before CTS is turned ON.

Chang Ð Select to change the RTS-to-CTS delay, from 0 to 1040 milliseconds in 8 milliseconds increments.

DTR Alarm: Disab

Next Enab Disab Prev

Data Terminal Ready Alarm (only displayed when Full Mode is enabled). Causes the DSU to report an alarm for the port if the port's DTR lead is Off for more than 30 seconds. The DCP displays DTR Alarm and reports the alarm to NMS.

Enab	Ð	Select if you want the DSU to report an alarm when the port's DTR lead turns Off for 30 seconds.
Disab	Ð	Select if no alarm is to be reported, regardless how long the port's DTR lead is Off.

AntiStream:Disab

Next Chang Prev

Antistreaming (only displayed when Full Mode is enabled). 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.
DSR FrcOn: Enab
Next	Enab	Disab	Prev

Data Set Ready Forced On (only displayed when Full Mode is enabled). Provides the ability to override any other options controlling the DSR lead.

Enab	Ð	Select for DSR to remain ON as long as the device is working, regardless of any tests or network alarms.
Disab	Ð	Select if DSR is to function as an active lead, reflecting various test and alarm conditions.
DSR on Tst: Enab
Next	Enab		Disab	Prev

Data Set Ready On in Test (only displayed when Full Mode is enabled). Controls the behavior of the DSR lead during testing.

Enab	Ð	DSR is ON continuously during testing, allowing a DTE that relies on DSR being ON to send test
		messages to the DSU.
Disab	Ð	DSR is Off during testing.

5-26 December 1996 3550-A2-GB20-20