Physical Layer Options (Phys Lyr Opt); Interface Type (Interface); Bit Rate; Flow Control - ADTRAN DSU IQ User Manual

PHYSICAL LAYER OPTIONS (PHYS LYR OPT)

Interface Type (INTERFACE)

Select the connector type for the DTE interface. The choices are
V.35 and EIA-232. See Pinouts on page A-1 for the connector pin
assignments.

Bit Rate

Set the operating speed of the DTE interface to 56 or 64 kbps.

Flow Control

This option determines how the DSU IQ responds to congestion
during DBU operation.

None

No flow control is used and the DSU IQ drops frames during
severe congestion while in DBU operation.

Hardware

The DSU IQ varies the DTE TC clock as necessary to relieve
congestion during DBU operation.

FECN/BECN

While in a congested state during DBU 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 attached DTE device have BECN set. This method is
useful if the attached DTE devices can respond to congestion
notification.
61200212L1-1 DSU IQ User Manual
Chapter 6. DTE Port Configuration
6-3