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Chapter 6. DTE Port Configuration

61200214L1-20 IQ Probe User Manual 6-3

None

No flow control is used and the IQ Probe drops frames during severe con-

gestion while in dial backup operation.

Hardware

The IQ Probe varies the DTE TC clock as necessary to relieve congestion

during dial backup operation.

FECN/BECN

While in a congested state during dial backup operation, frames across the

DBU PVCs have FECN or BECN set depending on the direction. Frames

outbound to the network have FECN set, while frames inbound to the at-

tached DTE device have BECN set. This method is useful if the attached

DTE devices can respond to congestion notification.

CTS Option

Set the CTS lead to F

ORCED

or F

OLLOW

RTS.

Forced On

The CTS lead is always on and the RTS lead is ignored.

Follow RTS

The CTS lead is on when the RTS lead is on (and off when the RTS lead is

off).

DSR Option

Set the DSR lead to F

ORCED

or N

ORMAL

Forced On

The DSR lead is always on.

Normal

The DSR lead is off when the IQ Probe does not receive DSR from the

DSU/CSU on the DCE port.

CD Option

Set the CD lead to F

ORCED

or N

ORMAL

Forced On

The CD lead is always on.

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ADTRAN 1200214L1 Spezifikationen Seite 79