Microtronix Access User Guide
7.4.2 LAPB Status
The LAPB status table provides status information for the LAPB frame layer. The following table
provides a description of each column.
LAPB Status
Parameter Description
Interface Interface(s) that are currently being used for LAPB / X.25
WAN 0 (hdlc0)
WAN 1 (hdlc1)
Mode The current mode of the X.25 device:
DTE- Data Terminating Equipment (terminal emulation)
DCE – Data Connecting Equipment (network emulation)
State The current state of the LAPB device.
DM – Disconnected Mode
LinkSetup – establishing data link (SABM sent)
Info transfer – Normal data transfer
FRMR – frame recovery
T1 Remaining time in seconds before retransmission of an unacknowledged frame
N2 Current retransmit attempts - number of attempts already made to complete the
successful transmission of a frame
vs Send State Variable v(s) – next send frame sequence number
vr Receive State Variable v(r) – next expected frame sequence number
va Last acknowledged frame sequence number v(a)
T2 Remaining time in seconds before transmission of an outstanding acknowledgement
WIN The current frame window size for the interface.
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