Paradyne 3551 manual If DTR is low

Configuring the Unit

Table 5-6

(4 of 4)

DBM Configuration Options

V.13 Signl: Enab for MPTC and MPTT; Disab for other configurations

Next Enab Disab Prev

V.13 Signaling (only displayed when Full Mode is enabled). V.13 signaling applies to the DBM when the DBM is in Dial Backup mode. The normal RTS/CTS delay is 14 ms at 2.4 kbps and 11 ms at all other speeds when V.13 is enabled. It is under 2 ms when V.13 is disabled.

For the V.13 sequence to be generated by a tributary DBM, the following must be set: RTS Cntrl must be set to DTE,

CTS Cntrl set to Std or Delay. For the V.13 sequence to function at the control DBM, the following must be set: LSD Lead must be set to Std.

NOTE: Although this configuration option must be enabled in both the tributary and control DSUs in order to use

	V.13 signalling, RTS Cntrl propagation only occurs in the tributary-to-control direction.
Enab	Ð Select when backing up a circuit that is configured for nondisruptive or mixed diagnostics or rate
	adaption. When enabled at both ends, LSD is turned ON at the control while RTS is ON at the tributary,
	and is turned Off when RTS is turned Off at the tributary DBM. The V.13 sequence is sent over the
	network to tell the control to turn ON LSD (only for a MPTC or MPTT configuration).
Disab	Ð Select when configured for point-to-point nondisruptive diagnostics or point-to-point rate adaption; V.13
	Signaling is turned Off.

Dial Test:Disab

Next Enab Disab Prev

Dial Tone Test (only displayed when Full Mode is enabled). When enabled, the DBM periodically checks for a signal or dial tone. If the test fails, the DSU reports a Dial Test Failure alarm in its health and status reports. A Dial Test occurs once every 60 minutes until a failure occurs. Then, the test repeats every minute until the network recovers.

Enab	Ð	Select to perform a Dial Tone testing.
Disab	Ð	Set to Disable if the DBM is not to perform Dial Tone testing.

DTRCallCon:Disab

Next Ansr Disab Prev

Data Terminal Ready Call Control (only displayed when Full Mode is enabled). DTRCallCon uses the state of the DTR lead to control backup when contact with the remote DSU is lost.

Ansr	Ð	Select answer when the DTR lead is used for incoming calls. The DBM answers a backup call from the
		remote DBM when DTR is raised. It drops the call when DTR goes low or will not answer an incoming call
		if DTR is low.
Disab	Ð	Select to disable DTR Call Control; the state of the DTR lead is ignored.

3550-A2-GB20-20 December 1996 5-15