Paradyne 3551 manual DBM Configuration Options, Rxc

COMSPHERE 3550 Series Data Service Units

Table 5-6

(1 of 4)

DBM Configuration Options

Rate(Kbps): 9.6
Next	14.4		12.0	9.6	4.8	2.4	Prev
DBM Rate. Sets the initial data rate (in kbps) of the DBM for backup calls over the dial circuit.
14.4 to	Ð	Select the data rate for V.32bis modulation. The rate 14.4 is not displayed if you have a 12.0 kbps DBM.
4.8 kbps
2.4	Ð	Select for V .22bis modulation.
PrtSp(Kbps):		9.6
Next	14.4		12.0	9.6	4.8	2.4	1.2	Disab	Prev

Port Speed (not displayed with a TDM/Flex installed and enabled). Sets the speed of the DTE port interface. The port speed is set to any value less than or equal to the DBM Rate(Kbps) set above. The DBM performs rate adaption if set to less than the DBM port rate.

14.4 to	Ð Select the port speed for the DBM; 14.4 will not appear for a 12.0 kbps DBM.
1.2 kbps
Disab	Ð Select disable to set the port speed to 0.
TxClkSource: Int for a control DBM; RXC for a tributary DBM
Next	Int	RXC	Ext	Prt1	Prt2	DSU	Prev
Transmit Clock Source. Specifies the transmit timing source for the DBM.
Int	Ð Select internal clock source to take timing from the DBM. This setting is used primarily in point-to-point
		applications.
RXC	Ð Select receive clock source to take timing from the remote DBM's clock source.
Ext	Ð	Select external clock source when timing is taken from the external Transmit T iming lead on Port 1 (not
		displayed if a TDM/Flex is installed).
Prt1 or	Ð Select the port that timing is to be taken from, using the selected port's external Transmit
Prt2		Timing lead (displayed if a TDM/Flex is installed and is enabled).
DSU	Ð Select the DSU's clock source when connected to a DDS network and the network is to provide the
		timing. Do not select DSU if the DSU and the DBM operate at different rates.
CarrLossDisc: Yes
Next	Yes	No	Prev

Carrier Loss Disconnect (only displayed when Full Mode is enabled). Controls whether the DBM terminates a call when receive signal carrier is lost, or when the signal is no longer acceptable.

Yes	Ð	Select when you want to terminate the backup call when the carrier is lost.
No	Ð	Never select; for factory testing only. Selecting No will cause an off-hook line condition, which will result in
		excessive telephone charges.
Auto Retrain:Yes
Next	Yes	No	Prev

Automatic Retrain (only displayed when Full Mode is enabled). Controls whether the DBM will start a retrain sequence automatically when received signal quality is no longer acceptable.

Yes	Ð	Select if you want the DBM to retrain automatically.
No	Ð	Select if you do not want the DBM to retrain automatically. However, the DBM will respond to a retrain
		request from a remote modem or DBM.

5-12 December 1996 3550-A2-GB20-20