X25AM Configuration and Management Manual

PTrace for the X25AM Subsystem
X25AM Configuration and Management Manual—523424-004
6-27
Common X.25 Terms
Common X.25 Terms
The X.25 standard as defined by the ITU-T allows various configuration modifiers to be
set by the PDNs. The vendor often requests these values at subscription time. The
X25AM subsystem has descriptive names for these values.
You can set any of the configuration parameters in Table 6-5 by using the SCF ADD
DEVICE or ALTER DEVICE command to the WAN subsystem and specifying the
corresponding X25AM I/O process modifier. Some configuration parameters can be
modified by the SCF ALTER LINE command to the X25AM subsystem; these are
noted in the table as SCF line attributes.
You can alter the timers T10 through T23 using X25AM I/O process modifiers. R10 is
the retry counter for T10, R11 corresponds to T11, and so on. The Txx timeout value is
the interval before an operation can be retried. The Rxx retry counter is the number of
times an operation can be retried.
Table 6-5. X.25 Configuration Parameters and X25AM I/O Process Modifiers
(page 1 of 2)
Operation
X25AM
Parameter
Probable
Value Meaning
Device Modifier/
Line Attribute
Name
K 4 Number of I frames
outstanding.
L2WINDOW
N1 1056 Maximum number of bits
in an I-frame, including
Address, Control, and
FCS bytes.
PACKETSIZE Modifier (For
PACKETSIZE=128 bytes,
N1=1056 bits)
N2 10 Maximum retransmission
count.
L2RETRIES
RETRIES is the SCF line
attribute.
T1 3 seconds Retransmission timer. L2TIMEOUT
T1TIMEOUT is the SCF
line attribute.
T2 L2IDLETIMEOUT
IDLETIMEOUT is the SCF
line attribute.
Restart T10 60 seconds Timer set at DCE issue
of restart indication.
Txx
Call request T11 180
seconds
Timer set at DCE issue
of incoming call.
Txx
Reset T12 60 seconds Timer set at DCE issue
of reset indication.
Txx
Clear T13 60 seconds Timer set at DCE issue
of CLEAR indication.
Txx